СПОСОБ И МИКРОСТРУКТУРА ДЛЯ ЭПОКСИДИРОВАНИЯ

Изобретение относится к катализатору для эпоксидирования этилена. Данный катализатор содержит каталитически эффективное количество серебра, промотирующее количество рения и цезия. При этом негомогенная микроструктура катализатора включает серебро и рений-цезиевую интерметаллическую фазу, причем концентрация рения и цезия в данной интерметаллической фазе является более высокой, чем концентрация серебра. Предлагаемый катализатор позволяет селективно окислять этилен в этиленоксид молекулярным кислородом при высоких уровнях конверсии этилена и кислорода. 5 з.п. ф-лы, 10 ил., 1 пр.

СПОСОБ ЗАСЫПКИ ПРОДОЛЬНОГО УЧАСТКА КОНТАКТНОЙ ТРУБЫ

Изобретение касается способа засыпки продольного участка контактной трубы единообразной частью твердого слоя катализатора. Способ засыпки продольного участка контактной трубы единообразной частью твердого слоя катализатора, активная масса которого представляет собой, по меньшей мере, один мультиэлементный оксид, который содержит a) элементы Мо, Fe и Bi, или b) элементы Мо и V, или c) элемент V, а также дополнительно Р и/или Sb, или активная масса которого содержит элементарное серебро на оксидном изделии-носителе, и который состоит из одного единственного сорта Sили из гомогенизированной смеси нескольких отличных друг от друга сортов Sкаталитически активных формованных изделий определенной геометрической формы или каталитически активных формованных изделий и инертных формованных изделий определенной геометрической формы, причем медиана максимальных продольных размеров L изделий определенной геометрической формы сорта Sхарактеризуется значением D , по меньшей мере, в пределах одного сорта ...

НОСИТЕЛЬ КАТАЛИЗАТОРА ЭПОКСИДИРОВАНИЯ, ЕГО ПОЛУЧЕНИЕ И ПРИМЕНЕНИЕ

Носитель имеет скорость солюбилизации натрия, определенную по количеству натрия, выделившемуся при погружении носителя в кипящую воду при соотношении кипящей воды и носителя 3:1 (мас./мас.), не более 5 мас.ч. на млн., из расчета на общую массу носителя, за 5 мин. При этом способ получения катализатора заключается в том, что упомянутую скорость солюбилизации натрия достигают методом, эффективным для перевода ионизируемых частиц, находящихся на поверхности носителя, в ионное состояние, и удалении, по меньшей мере, части этих частиц, или перевода ионизируемых частиц в нерастворимое состояние, или перевода ионизируемых частиц в стационарное состояние. Катализатор содержит упомянутый носитель, серебро и необязательно промотор. Катализатор получают путем пропитки, где активность водородных ионов в растворе снижена добавлением основания. Кроме того, заявлен способ каталитического эпоксидирования алкена кислородсодержащим газом. Заявленные носители с контролируемой скоростью солюбилизации обеспечивают ...

СПОСОБ ОКИСЛЕНИЯ УГЛЕВОДОРОДОВ И КАТАЛИЗАТОР ДЛЯ ОКИСЛЕНИЯ УГЛЕВОДОРОДОВ

Изобретение относится к способу окисления углеводородов в присутствии смеси водорода и кислорода на катализаторе, содержащем 0,5-10 мас.% серебра и титансодержащий носитель, отличающемуся тем, что катализатор содержит: a) титансодержащий носитель, такой как титанилгидрат, диоксид титана или смешанные оксиды кремния и титана, или смешанные оксиды кремния, алюминия и титана, b) частицы серебра со средним размером частиц от 0,3 до 100 нм. Также изобретение относится к указанному катализатору. Данный способ находит свое применение в промышленности для получения, например, оксидов этилена и пропилена. Технический результат – повышение селективности процесса, а также увеличение выхода продукта с уменьшением затрат. 2 н. и 6 з.п. ф-лы.

СПОСОБ ПОЛУЧЕНИЯ КАТАЛИЗАТОРА ДЛЯ ИЗОТОПНОГО ОБМЕНА ПРОТИЯ-ДЕЙТЕРИЯ И ОРТО-ПАРА КОНВЕРСИИ ПРОТИЯ

Изобретение относится к области гетерогенного катализа, в частности к способу получения катализатора для изотопного обмена протия-дейтерия и орто-пара конверсии протия. Способ включает получение наночастиц серебра при радиационно-химическом восстановлении ионов серебра из обратномицеллярного раствора с последующим нанесением на носитель, в качестве которого используют Сибунит, причем наночастицы серебра получают путем приготовления обратномицеллярного раствора серебра из 0,02-0,5 М раствора бис(2-этилгексил)сульфосукцината натрия в неполярном растворителе и 0,003-2,0 М водного раствора AgNO, приготовленный раствор обрабатывают ультразвуком до получения обратномицеллярной дисперсии с последующей ее деаэрацией, после чего суспензию подвергают воздействию γ-излученияСо с дозой от 5 до 30 кГр. Изобретение позволяет получить катализатор, предназначенный для работы при температурах, максимально приближенных к температурам сжижения протия и дейтерия. 5 табл., 4 пр., 1 ил.

КАТАЛИЗАТОР ДЛЯ КАТОДА ТОПЛИВНОГО ЭЛЕМЕНТА И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Изобретение относится к области катализаторов для топливных элементов, в частности к катализатору для катода топливного элемента, а также к способу его получения. Описан катализатор для катода топливного элемента, включающий сплав палладия и металла, выбранного из кобальта, хрома, ванадия, серебра, меди, золота, платины или их смеси, на углеродном носителе, отличающийся тем, что он дополнительно содержит аморфизованный углерод при следующем содержании компонентов, мас.%: ! палладий 5,0-20,0 металл или смесь металлов 1,5-11,0 аморфизованный углерод 1,0-3,0 углеродный носитель остальное, ! при атомном соотношении металлов в сплаве палладий : металл или смесь металлов=(1,0-1,8):(0,55-1.0). Также описан способ получения указанного выше катализатора для катода топливного элемента, включающий диспергирование ультразвуком углеродного носителя и по меньшей мере одного из прекурсоров палладия и металла, выбранного из кобальта, хрома, ванадия, серебра, меди, золота, платины или их смеси в среде органического ...

НОСИТЕЛЬ ДЛЯ КАТАЛИЗАТОРА ОЛЕФИНОКСИДА

Изобретение относится к носителям для катализатора, используемого для эпоксидирования. Описан носитель для катализатора эпоксидирования олефина, причем указанный носитель имеет объем пор от пор с диаметром менее 1 мкм менее 0,20 мл/г и объем пор от пор с диаметром более 5 мкм менее 0,20 мл/г, в котором, по меньшей мере, 40% объема пор состоит из пор, имеющих диаметр в интервале от 1 мкм до 5 мкм. Описан катализатор эпоксидирования олефина, который включает носитель и каталитически эффективное количество серебра на нем, причем указанный носитель имеет объем пор от пор с диаметром менее 1 мкм менее 0,20 мл/г и объем пор от пор с диаметром более 5 мкм менее 0,20 мл/г в, котором, по меньшей мере, 40% объема пор состоит из пор, имеющих диаметр в интервале от 1 мкм до 5 мкм. Описан катализатор эпоксидирования олефина, который включает носитель и каталитически эффективное количество серебра на нем, причем указанный носитель имеет общий объем пор от 0,2 мл/г до 0,6 мл/г, площадь поверхности от ...

КАТАЛИЗАТОР ДЛЯ ПОЛУЧЕНИЯ МЕТИЛЭТИЛКЕТОНА

Изобретение относится к области основного органического синтеза, конкретно к катализаторам окисления вторично бутилового спирта в метилэтилкетон в паровой фазе, и может быть использовано на нефтехимических и нефтеперерабатывающих предприятиях. Предложен катализатор для получения метилэтилкетона, включающий серебро на алюмосиликатном носителе при содержании компонентов в мас.%: серебро 10-20, носитель - остальное. В качестве носителя предложено использовать смесь орторомбической формы муллита, тригональной формы корунда α-кристобаллита, взятых в массовом соотношении (1-2):(6-8):(1-2) соответственно. Катализатор обладает повышенной активностью, селективностью и механической прочностью. 5 табл.

Способ изготовления катализатора селективного гидрирования ППФ

Изобретение относится к области химической технологии производства катализаторов, в частности, катализаторов селективного гидрирования пропан-пропиленовой фракции (ППФ). Предложен способ приготовления катализатора селективного гидрирования ППФ, включающий пропитку носителя на основе оксида алюминия растворами солей металлов, а именно, солей палладия и серебра, с последующей промывкой, сушкой и прокалкой. Техническим результатом изобретения является создание способа получения катализатора селективного гидрирования ППФ, обладающего хорошими характеристиками, в частности, обладающего высокой селективностью и позволяющего осуществлять практически полную конверсию метилацетилена и пропадиена с минимизацией побочной реакции гидрирования пропилена в пропан. 2 пр., 1 табл., 1 ил.

КАТАЛИЗАТОР ДЛЯ ПОЛУЧЕНИЯ ОКИСИ ЭТИЛЕНА

Использование: нефтехимия. Катализатор содержит 1 - 25 мас.% серебра, 10 - 3000 ч. /млн, щелочного металла, 0,1 - 10 ммоль/грения и остальное - носитель. Носитель содержит α - оксид алюминия, БФ альфа - Al2O3 предпочтительно в количестве свыше 90 мас.% и дополнительно 0, 05 - 6 мас.% оксида щелочноземельного металла, предпочтительно 0,05 - 5 мас.%, 0,01 - 5 мас.% диоксида кремния БФ SiO , предпочтительно 0,05 - 3 и 0 - 10 мас.% диоксида циркония, предпочтительно 0,5 - 2 мас.%. Носитель имеет объем пор по воде , предпочтительно 0.3-0.5 см3/г , и удельную поверхность 0.15-3 м2/г , предпочтительно 0.3-2.0 м2/г. В качестве щелочноземельного металла катализатор содержит металл из группы, состоящей из оксида кальция, оксида магния или их смесей, в количестве 0,05 - 2 мас.%. Катализатор может содержать сопромотор, выбранный из группы, состоящей из серы, молибдена, вольфрама, хрома или их смеси, в количестве 0,1 - 15 мкмоль/г катализатора. 7 з.п.ф-лы, 2 ил.

СПОСОБ ПРИГОТОВЛЕНИЯ СЕРЕБРОСОДЕРЖАЩЕГО КАТАЛИЗАТОРА ДЛЯ ОКИСЛЕНИЯ ЭТИЛЕНА В ЭТИЛЕНОКСИД И СЕРЕБРОСОДЕРЖАЩИЙ КАТАЛИЗАТОР ДЛЯ ОКИСЛЕНИЯ ЭТИЛЕНА В ЭТИЛЕНОКСИД

Использование: в каталитической химии, в частности в нефтехимии для процессов окисления этилена в этиленоксид. Сущность изобретения: серебросодержащий катализатор содержит 1-25 мас.% серебра на носителе. Последний содержит оксид алюминия, предварительно смешанный с соединением олова в атомном отношении последнего к алюминию, равном 0,0001-0,1, и соединением цезия в атомном отношении последнего к алюминию, равном 0,0001-0,1, и прокаленный при 1200-1700°С. Серебросодержащий катализатор может дополнительно содержать щелочной промотор - калий, рубидий или цезий в количестве 20-1000 мас.ч. /млн. мас. ч.к-ра. Катализатор содержит фторидный анион, предпочтительного в количестве 10-1000 мас. ч./млн.мас. ч.к-ра. Катализатор получают пропиткой предварительно полученного носителя раствором соединения серебра с последующим восстановлением соединения серебра до металлического. Для носителя предпочтительно использовать безводный или гидратированный оксид алюминия. В качестве соединения цезия используют ...

СПОСОБ ИЗГОТОВЛЕНИЯ КАТАЛИТИЧЕСКОГО НЕЙТРАЛИЗАТОРА ОТРАБОТАВШИХ ГАЗОВ ДВИГАТЕЛЕЙ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к технологии получения катализаторов и может быть использовано в системах нейтрализации отработавших газов автотранспорта. Предлагаемый способ включает нанесение в каналы его керамического корпуса покрытия на основе металла платиновой группы с последующей термической обработкой и использование электрического сопротивления, подсоединяемого к источнику питания, причем в качестве покрытия используют органозоль в виде ультрадисперсного металла платиновой группы, осажденного на кристаллах нафталина, который многократно наносят в каналы предварительно нагретого корпуса, а затем после термической обработки на полученном покрытии изготовляют электрические контакты путем многократного нанесения на него в местах подсоединения к источнику питания органозоля в виде ультрадисперсного серебра, осажденного на кристаллах нафталина, который также подвергают термической обработке. Технический результат - повышение эффективности процесса очистки отработавших газов от вредных примесей ...

КАТАЛИЗАТОР ОКИСЛЕНИЯ СЕРНИСТЫХ СОЕДИНЕНИЙ

Изобретение относится к области производства гетерогенных катализаторов жидкофазного окисления сернистых соединений (диоксида серы, сероводорода, меркаптанов) и может быть использовано для очистки газовых выбросов и сточных вод энергетической, нефтеперерабатывающей, нефтехимической, химической и целлюлозно-бумажной отраслей промышленности. Предлагается гетерогенный катализатор окисления сернистых соединений, содержащий активный компонент на носителе - полиэтилене высокого давления, отличающийся тем, что в качестве активных компонентов содержит пиролюзит-руду состава, мас.%: оксид марганца (IV) 54,76-69,10; оксид марганца (II) 1,80-4, 85; оксид железа (III) 5,00-11,23; оксид кремния 4,05-7,52; оксид бария 3,95-5,02; оксид алюминия 0,92-5,03; оксид титана 0,01-0,03; оксид кальция 0,50-0,82; оксид магния 0,40-0,70; оксид калия 2, 87-3,10; оксид натрия 0,37-0,58; оксид фосфора (V) 1,10-1,35; примеси - потери при прокаливании остальное, а также оксид меди (II) и пиритный огарок при следующем ...

КАТАЛИЗАТОРЫ ДЛЯ ПОЛУЧЕНИЯ АЛКИЛЕНОКСИДОВ, ИМЕЮЩИЕ УЛУЧШЕНУЮ СТАБИЛЬНОСТЬ, ЭФФЕКТИВНОСТЬ И/ИЛИ АКТИВНОСТЬ

... 1. Катализатор для получения алкиленоксида с помощью эпоксидирования алкена в паровой фазе, содержащий нанесенное пропиткой серебро и, по меньшей мере, один промотор для увеличения эффективности на жаропрочный твердый носитель, и указанный носитель содержит количество компонента циркония, достаточное для улучшения, по меньшей мере, одного свойства из активности, эффективности и стабильности катализатора, по сравнению со сходным катализатором, который не содержит компонента циркония, указанный компонент циркония присутствует в носителе по существу в виде силиката циркония. 2. Катализатор по п.1, в котором количество нанесенного пропиткой серебра составляет примерно от 2 до 60% от массы катализатора. 3. Катализатор по п.2, в котором количество нанесенного пропиткой серебра составляет примерно от 5 до 50% от массы катализатора. 4. Катализатор по п.3, в котором количество нанесенного пропиткой серебра составляет примерно от 10 до 40% от массы катализатора. 5. Катализатор по п.1, в котором, ...

КАТАЛИТИЧЕСКАЯ КОМПОЗИЦИЯ ДЛЯ СЕЛЕКТИВНОГО ПРЕВРАЩЕНИЯ АЛКАНОВ В НЕНАСЫЩЕННЫЕ КАРБОНОВЫЕ КИСЛОТЫ, СПОСОБ ПОЛУЧЕНИЯ КОМПОЗИЦИИ И СПОСОБ ПРИМЕНЕНИЯ КОМПОЗИЦИИ

... 1. Каталитическая композиция для получения ненасыщенной карбоновой кислоты из алкана, содержащая соединение формулы Mo1VaSbbNbcMdOx, в которой Мо представляет собой молибден, V означает ванадий, Sb означает сурьму, Nb означает ниобий, М представляет собой галлий, висмут, серебро или золото, а составляет от 0,01 до 1, b составляет от 0,01 до 1, с составляет от 0,01 до 1, d составляет от 0,01 до 1 и х определяется требованиями валентности других присутствующих элементов. 2. Каталитическая композиция по п.1, которая имеет формулу Mo1VaSbbNbc MdM'eOx, в которой М' представляет собой тантал, титан, алюминий, цирконий, хром, марганец, железо, рутений, кобальт, родий, никель, платину, бор, мышьяк, литий, натрий, калий, рубидий, кальций, бериллий, магний, церий, стронций, гафний, фосфор, европий, гадолиний, диспрозий, гольмий, эрбий, тулий, тербий, иттербий, лютеций, лантан, скандий, палладий, празеодим, неодим, иттрий, торий, вольфрам, цезий, цинк, олово, германий, кремний, свинец, барий и таллий ...

СПОСОБ ЗАПУСКА ПРОЦЕССА ЭПОКСИДИРОВАНИЯ, КАТАЛИЗАТОР И ПРОЦЕСС ЭПОКСИДИРОВАНИЯ ОЛЕФИНА

... 1. Способ эпоксидирования олефина, включающий стадии (а) предварительной пропитки галоидорганическим соединением высокоселективного катализатора эпоксидирования на основе серебра, (b) пропускания над предварительно пропитанным катализатором подаваемого материала, который не содержит галоидорганического соединения или содержит галоидорганическое соединение в концентрации не больше 2·10-4% мольных, рассчитанной как содержание галогена по отношению ко всему подаваемому материалу, в течение периода от более 16 до 200 ч, и (с) последующего контактирования катализатора с подаваемым материалом, содержащим олефин, кислород и галоидорганическое соединение, в которой концентрация галоидорганического соединения, по меньшей мере, на 0,2·10-4% мольных выше концентрации, применяемой на стадии (b), рассчитанных как содержание галогена по отношению ко всей подаваемой смеси. 2. Способ по п. 1, где катализатор содержит, в дополнение к серебру, металл группы ІА и одну или несколько улучшающих селективность ...

КАТАЛИЗАТОР ЭПОКСИДИРОВАНИЯ

... 1. Катализатор, пригодный для эпоксидирования олефинов, не имеющих аллильного атома водорода, в частности этилена, кислородом в паровой фазе, содержащий каталитически эффективное количество серебра, промотирующее количество щелочного металла, промотирующее количество магния и промотирующее количество рения, нанесенных на носитель, содержащий по меньшей мере 85 мас.% альфа-оксида алюминия и 0,001 - 2 мас.% (измерен как элемент) магния в форме оксида. 2. Катализатор по п.1, в котором носитель дополнительно содержит 0,01 - 5 мас. % (измерен как диоксид) кремния в форме оксида и 0,1 - 10 мас.% (измерен как диоксид) циркония в форме оксида. 3. Катализатор по п.1, в котором носитель имеет объем пор (пористость) по воде между 0,1 см3/г и 0,6 см3/г и удельную поверхность между 0,1 м2/г и 3 м2/г. 4. Катализатор по п.1, в котором носитель содержит оксид магния в количестве от около 0,01 мас.% до около 0,1 мас.%, считая на общую массу носителя. 5. Катализатор по п.1, в котором количество серебра в ...

КАТАЛИЗАТОР ДЛЯ ПОЛУЧЕНИЯ ГЛИОКСАЛЯ

Изобретение относится к органической химии и может быть использовано для промышленного получения гликоля путем парофазного каталитического окисления этиленгликоля. Технической задачей изобретения является повышение выхода целевого продукта путем повышения конверсии и селективности процесса при одновременном упрощении процесса формирования каталитического слоя, увеличении продолжительности стабильной работы катализатора и сокращении расхода серебра. Сущность изобретения состоит в том, что глиоксаль получают путем парофазного окисления этиленгликоля над двухслойном катализатором, при этом в качестве стабилизирующей добавки в парогазовую смесь вводят гексаметилтриамид фосфорной кислоты в количестве от 10 до 50 ppм в расчете на фосфор. В качестве катализатора этого способа используют гранулированный серебряный катализатор, полученный на основе волокнистого кристаллического дендритного серебра с пористой структурой. Каталитический слой формируют путем послойного размещения гранул серебра, при ...

КАТАЛИЗАТОР НИЗКОТЕМПЕРАТУРНОГО ОКИСЛЕНИЯ МОНООКСИДА УГЛЕРОДА И СПОСОБ ЕГО ПРИМЕНЕНИЯ

Изобретение относится к области гетерогенного катализа, а именно к низкотемпературному окислению CO, и может быть использовано для систем очистки воздуха в замкнутых помещениях, например в салонах автотранспорта, производственных, офисных и жилых помещениях. Предложен катализатор низкотемпературного окисления монооксида углерода, представляющий собой серебро, нанесенное на поверхность диоксида кремния в количестве 1-16% от массы катализатора. Катализатор содержит серебро в виде наночастиц размером<6 нм, которые равномерно распределены на поверхности мезопористого силикагеля с величиной удельной поверхности 50-200 м/г и размером пор 3-60 нм, используемого в качестве носителя. Изобретение относится также к способу применения катализатора для очистки воздуха от монооксида углерода, который осуществляют с использованием катализатора путем пропускания потока влажного воздуха, содержащего CO до 100-115 мг/м, через слой катализатора при комнатной температуре. 2 н. и 2 з.п. ф-лы, 1 табл., 4 ил.

НОСИТЕЛЬ КАТАЛИЗАТОРА, КАТАЛИЗАТОР И ЕГО ПРИМЕНЕНИЕ

... 1. Носитель катализатора, содержащий по меньшей мере 85 масс. процентов альфа-оксида алюминия, по меньшей мере 0,06 мас.% SiOи не более 0,04 мас.% NaO, обладающий водопоглощением не более 0,35 грамм воды/грамм носителя и отношением водопоглощения (грамм воды/грамм носителя) к площади поверхности (мносителя/грамм носителя) не более 0,50 грамм воды/мносителя.2. Носитель по п. 1, отличающийся тем, что содержание SiOне превышает 0,40 мас.%.3. Носитель по п. 1, отличающийся тем, что содержание SiOне превышает 0,30 мас.%.4. Носитель по п. 1, отличающийся тем, что содержание NaO не превышает 0,03 мас.%.5. Носитель по п. 1, отличающийся тем, что содержит по меньшей мере 0,15 мас.% SiO.6. Носитель по п. 1, отличающийся тем, что указанное отношение не превышает 0,45 г/м.7. Носитель по п. 1, отличающийся тем, что указанное отношение не превышает 0,40 г/м.8. Носитель по п. 1, отличающийся тем, что указанное водопоглощение не превышает 0,30 г/г.9. Носитель по п. 8, отличающийся тем, что указанная площадь ...

СПОСОБ ПОЛУЧЕНИЯ КАТАЛИЗАТОРА ДЛЯ ИЗОТРОПНОГО ОБМЕНА ПРОТИЯ-ДЕЙТЕРИЯ

... 1. Способ получения катализатора для изотопного обмена протия-дейтерия, включающего получение наночастиц металла при восстановлении ионов металла под воздействием γ-излученияСо в обратномицеллярном растворе, состоящим из раствора соли металла, ПАВ, представляющего собой бис(2-этилгексил)сульфосукцинат натрия, и неполярного растворителя, изооктана, с последующим нанесением на носитель AlO, отличающийся тем, что в качестве соли металла используют RhClили RuOHClи готовят обратномицеллярные растворы родия или рутения при отношениях мольных количеств водного раствора соли металла к мольному количеству ПАВ в диапазоне от 1:1 до 10:1, затем добавляют водно-спиртовой раствор в количестве 5-50 мас.% и аммиачный раствор в количестве 10-30 мас.% с последующей ультразвуковой обработкой, деаэрацией и воздействием γ-излученияСо с дозой от 1 до 40 кГр.2. Способ получения катализатора для изотопного обмена протия-дейтерия по п.1, отличающийся тем, что в качестве спирта в водно-спиртовом растворе используется ...

Способ окисления углеводородов

... 1. Способ окисления углеводородов в присутствии смеси водорода и кислорода с содержащим серебро катализатором, который содержит: a) титансодержащий носитель и b) частицы серебра со средним размером частиц от 0,3 до 100 нм. 2. Способ по п.1, отличающийся тем, что в качестве углеводородов используют олефины. 3. Содержащий серебро катализатор для окисления углеводородов, который содержит: a) титансодержащий носитель и b) частицы серебра со средним размером частиц от 0,3 до 100 нм. 4. Применение катализатора по п.3 для окисления углеводородов. 5. Способ по одному или нескольким из пп.1-4, отличающийся тем, что в качестве носителя катализатора предпочтительно используют титанилгидраты, диоксиды титана и смешанные оксиды кремния и титана. 6. Способ по одному или нескольким из пп.1-4, отличающийся тем, что кремнийсодержащий носитель катализатора перед нанесением титана обрабатывают водой или водными солевыми растворами (например, растворами хлорида аммония, нитрата аммония, нитрата кальция, нитрата ...

КАТАЛИЗАТОР ДЛЯ ОЧИСТКИ НИТРОЗНЫХ ГАЗОВ ОТ КИСЛОРОДА И ДВУОКИСИ АЗОТА И СПОСОБ ЕГО ПРИГОТОВЛЕНИЯ (ВАРИАНТЫ)

... 1. Катализатор для очистки нитрозных газов от кислорода и двуокиси азота, содержащий окись серебра и двуокись марганца на носителе - γ-окиси алюминия, отличающийся тем, что, с целью повышения активности катализатора, он дополнительно содержит окись железа и закись-окись кобальта при следующем соотношении компонентов, мас.%: Окись железа - 10 - 30 Двуокись марганца - 4 - 7 Закись-окись кобальта - 2 - 10 Окись серебра - 3,5 - 10 γ-Окись алюминия - Остальное 2. Способ приготовления катализатора по п.1, включающий пропитку носителя водным раствором азотнокислого серебра с последующей сушкой и прокаливанием при температуре 500 - 550oC, отличающийся тем, что, с целью получения катализатора с повышенной активностью, в качестве носителя используют переосажденную гидроокись алюминия или ее смесь с технической гидроокисью алюминия при весовом соотношении от 1 : 4 до 4 : 1, которую подвергают обработке уксусной кислотой и перед пропиткой смешивают с окисью железа, двуокисью марганца и закисью-окисью ...

КАТАЛИЗАТОР СИНТЕЗА ЭТИЛЕНОКСИДА

... 1. Способ приготовления катализатора синтеза этиленоксида, представляющего собой серебро на носителе из оксида алюминия, который включает контактирование алюминий-оксидного носителя с водным основным раствором при температуре ниже 100°С и поддержание рН основного раствора выше 8 во время обработки путем добавления основания. 2. Способ по п.1, в котором рН поддерживают выше 9. 3. Способ по п.1, в котором рН поддерживают в интервале 10-13. 4. Способ по п.1, в котором основание добавляют к водному раствору соли во время обработки носителя.

CATALYST FOR OXIDIZING METHANOL INTO FORMALDEHYDE AND METHOD OF PREPARING IT

Способ получения смеси хлоранилинов

Способ приготовления катализатора для окисления этилена

Способ получения катализатора для получения окиси этилена

Способ получения серебряного катализатора для окисления этилена

EPOXIDATION MITTELS THALIUM-AKTIVIERTEN SILBERKATALYSATOREN

Verfahren zur Herstellung von Fluorethylenen und Chlorfluorethylenen.

Injektor und dessen Verwendung zum Besprühen von Katalysatorbetten

VERFAHREN ZUR HERSTELLUNG VON SILBERKATALYSATOREN, DIE AUF TRAEGER AUFGETRAGEN SIND

VERFAHREN ZUR HERSTELLUNG EINES KATALYTISCH WIRKSAMEN ELEKTRODENMATERIALS FUER SAUERSTOFFVERZEHR-ELEKTRODEN

VERFAHREN ZUR SELEKTIVEN HYDRIERUNG, SOWIE KATALYSATOR ZUR VERWENDUNG DABEI

Verfahren zur Herstellung eines aus einem geformten, katalytisch inerten, undurchlaessigen, mit einer Metalloxydschicht ueberzogenen Traeger bestehenden Katalysators

Durch Zeolith unterstützter, auf Silber basierender Katalysator zur Speicherung von NOx

Ein Nachbehandlungssystem verwendet chemische Reaktionen, um einen Abgasfluss zu behandeln. Eine Vorrichtung zur Verwendung innerhalb eines Nachbehandlungssystems schließt einen auf Silber basierenden NOx-Speicherkatalysator und einen Zeolithen ein. Der auf Silber basierende NOx-Speicherkatalysator und der Zeolith speichern NOx während einer Niedertemperatur-Betriebsanlaufperiode. In einer Ausführung schließt der Zeolith einen Barium-Y-Zeolithen ein.

Katalysator und Verfahren zur Reinigung von Stoffströmen

AKTIVIERUNG UND REGENERIERUNG EINES HYDRO-OXYDIERUNGSKATALYSATORS

VERFAHREN ZUR HERSTELLUNG EINES KATALYSATORS ZUR UMWANDLUNG VON AETHYLEN IN AETHYLENOXID UND SEINE VERWENDUNG

VERFAHREN ZUR HERSTELLUNG VON FORMALDEHYD

KATALYSATOREN UND IHRE HERSTELLUNG.

Hydrogenative cracking of hydrocarbon oils

In the hydrogenative cracking of a hydrocarbon oil by contacting the oil at an elevated temperature and pressure with hydrogen, the catalyst used comprises at least one metal of Group Ib and at least one metal of the palladium group intimately associated with an acid-acting support comprising from 50% to 90% by weight of silicon and 50% to 10% by weight of alumina. The alumina may be partially replaced by zirconia, titania borin or magnesia. Specified metals of Group Ib are silver and copper and the palladium group of metals consist of rhodium, ruthenium and palladium. The catalysts may be prepared by (1) impregnating the support in pellet or extrudate form with a solution or solutions of the metals followed by drying and calcining; (2) incorporating the salts into the refractory oxide as the hydrogel is formed by precipitation; (3) contacting the wet hydrogel, which has preferably been freed from alkali metal ions by ammonium hydroxide solution, with a solution of the salts of the metals ...

A process for the production of highly active silver catalysts

... 531,358. Silver catalysts; olefine oxides. FIFE, J. G. (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). July 19, 1939, No. 21009. [Class 1 (i)] [Also in Group IV] A silver catalyst suitable for the oxidation of olefines is prepared by shaping into pills &c. a mixture of finely divided silver and silver oxide or carbonate, and converting the latter into silver by heat or reduction. The mixture may be obtained by igniting a co-precipitated mixture of silver oxalate and oxide or carbonate. Small quantities of alkali compounds may be present as promoters.

PROCESS FOR ELECTROLYTICALLY PRODUCING METALLIC SILVER POWDER

... 1400758 Electrolytically producing silver powder SNAMPROGETTI SpA 12 Dec 1972 [28 Dec 1971] 57357/72 Heading C7B Ag is electrolytically deposited on a cathode by electrolysis of a solution containing cations of Ag complexed with ammonia and, during the electrolysis, the Ag is removed from the cathode as a powder as it is formed. The removal may be by brushes (3, 3') rotated by a motor (4) as illustrated in the Fig. (not shown). Alternatively, the removal may be by ultrasonic vibrations, jets of liquid under pressure or by vigorous stirring of the electrolyte. Porous Ag powder can be produced having particle sizes of 300 to 1500 Angstroms. the complexed Ag cations may be derived from silver nitrate, sulphate, acetate, halide, oxalate or ammoniacal silver hydroxides. A colloid such as carboxymethylcellulose may be added to the electrolyte to prevent agglomeration of the powder. The electrolyte may be circulated through a heat exchanger (6) by a peristaltic pump (5). Specified electrolyzing ...

Air filter with catalytic filter bodies

An air filter (20) for the air which is fed to the passenger cabin of a motor vehicle includes a plurality of filter bodies (10) which support one or more catalysts for the catalytic conversion of gas-like harmful substances into less harmful products. The dimensions of the filter bodies are such that they will not escape through a mesh structured wall (28) of the chamber in which the bodies are stored. The surfaces of the filter bodies are preferably corrugated and/or ribbed to provide large surface areas and to minimise contact with adjacent filter bodies. The filter bodies may be produced from thermoplastic material by heating it up in a hot gas stream containing catalyst particles which become embedded in the filter bodies' surfaces.

RING A-SUBSTITUTED RING A-AROMATIC STEROIDS

... 1,267,915. #1,3,5(10)-Steroids. GLAXO LABORATORIES Ltd. 23 May, 1969 [24 May, 1968], No. 25005/68. Heading C2U. The invention comprises #1,3,5(10)-steroids having either an etherified hydroxyl group in the 3-position and a formyl or carboxy group in the 1-position, or an etherified hydroxy group in the 1-position and a formyl or carboxy group in the 4-position; and their preparation from the corresponding steroids having a methyl group in place of the formyl or carboxy group by oxidation of methyl to formyl with a 1-electron transfer oxidizing agent (e.g. a ceric or argentic compound) followed, when required, by oxidation of formyl to carboxy (e.g. with KMnO 4 ). Alternatively, the formyl group may be cleaved (e.g. with tris - (triphenylphosphine) rhodium chloride) to give a 3-(etherified hydroxy)-1- unsubstituted or 1-(etherified hydroxy)-4-unsubstituted steroid. 3 - Methoxy - 1 - methylestra - 1,3,5(10),6- tetraen-17-one is prepared from androsta-1,4,6- triene-3,17-dione ...

SILVER CATALYST

Process for preparing silver catalyst

An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of a neo acid; subjecting the impregnated support to a low temperature activation by heating at a temperature in the range of 250 DEG C to 300 DEG C on a moving belt in an atmosphere containing less oxygen than air, and post impregnating the support with an alkali metal, preferably cesium.

Partial hydrogenation of cycloaliphatic compounds containing at least two olefinic double bonds

The partial hydrogenation of cycloaliphatic hydrocarbons having at least two olefinic double bonds is effected with hydrogen in the presence of metallic palladium and heavy metal ions (a heavy metal is one having a specific gravity above 5). Suitable starting materials contain 2-4 conjugated or non-conjugated double bonds in a C5-C12 ring which may be substituted by up to three C1-C4 alkyl groups or 1 or 2 double bonds in a C5-C12 ring and additionally 1 or 2 double bonds in a C2-C6 side chain or in a second C5-C8 alicyclic ring which may be fused to the first ring, e.g. cyclopentadiene, 1,3 - cyclohexadiene, 1,3,5-cycloheptatriene, 1,3- or 1,5-cyclooctadiene, cyclooctatetraene, cyclododecadiene, methyl-cyclopentadiene, dimethylcyclooctadiene, 1-vinyl - 1 - cyclohexene, 1 - vinyl - 4 - cyclohexene, limonene, 1,11-dicyclohexenyl, dicyclopentadiene, and bicyclo-[4,2,0]-octatriene-2,4,7. Metallic palladium is deposited on active charcoal, alumina, barium sulphate, calcium carbonate, pumice ...

Three-way catalyst and its use in exhaust systems

Process for the selective hydrogenation of hydrocarbon mixtures

Hydrocarbon mixtures containing compounds having more than one olefinic bond and/or at least one acetylenic bond, but substantially free from acetylene, are selectively hydrogenated to mono-olefins in the presence of a catalyst comprising at least one metal of Group Ib, i.e. copper, silver and gold, supported on an inert carrier. The process may be applied to hydrocarbon mixtures boiling below 216 DEG C., suitably those obtained by cracking processes, and these include full boiling range gasolines, narrow fractions thereof, and substantially pure butadiene and isoprene. The Group Ib metal may constitute 1-15% by weight of the total catalyst; silver and/or copper supported on silica gel is preferred. A preferred catalyst is made by impregnating the support with copper and/or silver complexed with a water-soluble nitrogen base, particularly ammonia or ethylene diamine, and calcining. Hydrogenation may be effected at 35-345 DEG C., at 1-50 atmospheres, and in the vapour, liquid or mixed phase ...

Method of removing oxygen from a gas containing unsaturated hydrocarbon

This invention consists essentially in a method of removing oxygen from a gas containing an unsaturated hydrocarbon, which comprises contacting a gas containing an unsaturated hydrocarbon and oxygen with silver and/or gold, or a catalyst containing at least one of them, in the presence of hydrogen.

METAL OR ALLOY CATALYSTS OR CATALYST SUPPORTS

PROCESS FOR THE PREPARATION OF CATALYSTS FOR USE IN THE MANUFACTURE OF ETHYLENE OXIDE

... 1452145 Epoxidation catalysts SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 13 Dec 1973 [15 Dec 1972] 57808/73 Heading B1E [Also in Division C2] Catalysts comprising silver on a carrier are prepared by impregnating the carrier with an aqueous solution comprising hexamethylenetetramine and silver ions bound to 1, 2-diaminoethane and heating the impregnated carrier at a temperature at which silver is formed. The heating may be at 50-100‹C and be followed by heating at 125-400‹C to fix the silver on the carrier which may contain SiO 2 and/or Al 2 O 3 The impregnating solution may also contain an alkali metal compound.

Process for the dehalogenation of halogen containing aromatic amino compounds

A process for the dehalogenation of halogen-containing aromatic compounds takes place in the vapor phase, at a temperature of between 280 DEG and 420 DEG C., by the action of hydrogen in the presence of a controlled-action hydrogenation catalyst deposited on an alumina-based support wherein the support used is modified, at least on the surface, by the incorporation of a metal in the form of a salt or an oxide, this incorporation consisting in treating the support with the said metal salt or metal oxide and then carrying out a calcination at a temperature ranging from about 500 DEG to 1,000 DEG C.

Production of olefine oxides

Olefine oxides are produced by contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine-containing reaction modifier; the performance of the catalyst is improved by contacting it with a nitrate or nitrite forming substance for example nitric oxide.

Process of deodorization of liquified hydrocarbons, in particular of commercial butane.

CATALYSTS ON BASIS PRECIOUS METAL AND TITANIUM OF HALTIGER, ORGANIC-INORGANIC HYBRID MATERIALS FOR THE SELECTIVE OXIDATION OF HYDROCARBONS

VERFAHREN ZUR HERSTELLUNG VON M-CHLORANILINEN

CATALYST FOR THE OXIDATION OF CARBON MONOXIDE IN CIGARETTE SMOKE

VERFAHREN ZUR SELEKTIVEN HYDRIERUNG VON C2- -MINUS-FRAKTIONEN

VERFAHREN ZUR HERSTELLUNG VON FEINTEILIGEN SILBERABLAGERUNGEN AUF OBERFLACHEN VON FESTKORPERN

PROCEDURE FOR THE PRODUCTION OF SILVER TRAGERKATALYSATOREN

PROCEDURE FOR THE PRODUCTION OF M-CHLORANILINEN THROUGH ENTHALOGENIERUNG AND IF NECESSARY EQUAL EARLY REDUCTION OF A POLYCHLORANILINS OR - NITROBENZENE

PROCEDURE FOR the PRODUCTION OF 3,4-EPOXY-1-BUTEN

SILVER CATALYST AND PROCEDURE FOR ITS PRODUCTION.

PROCEDURE FOR THE REDUCTION OF A REFINING CATALYST BEFORE ITS APPLICATION.

PROCEDURE FOR THE REDUCTION OF A REFINING CATALYST BEFORE ITS APPLICATION.

PROCEDURE FOR THE PRODUCTION OF FLUORETHYLENEN AND CHLORFLUORETHYLENEN.

PROCEDURE FOR THE PRODUCTION OF 2,2,2 TRIFLUORAETHANOL.

STRUCTURED CATALYST POURING

BIMETAL CARRIER CATALYST ON PLATINUM OR SILVER BASIS, PROCEDURE FOR ITS PRODUCTION AND USE IN ELECTRO-CHEMICAL CELLS

PROCEDURE FOR THE PRODUCTION OF PHOSPHORUS-ENDOWED SILVER CATALYSTS

PRODUCTION METALLIC PALLADIUM, COPPER AND GOLD OF AN ABSTENTION OF VINYL ACETATE CATALYST

Procedure for the production silver of containing carrier catalysts

PRODUCTION OF ETHYLENE OXIDE

SUPPORTED SILVER CATALYST

Ethylene oxide catalyst

Catalysts for the oxidation of carbon monoxide in cigarette smoke

Silver catalyst for formaldehyde preparation

PROCESSES FOR THE PREPARATION OF CYCLIC ETHERS

SILVER CATALYST AND PRODUCTION OF ETHYLENE OXIDE

PROCESS FOR THE PREPARATION OF A SILVER-CONTAINING CATALYST

A method for improving the selectivity of a catalyst and a process for the epoxidation of an olefin

A process for preparing vinyl acetate utilizing a catalyst comprising palladium, gold, and any of certain third metals

Process for the direct oxidation of olefins to olefin oxides

PROCESS FOR THE PREPARATION OF A SILVER-CONTAINING CATALYST

Hydroperoxide decomposition process

A process for the continuous preparation of aqueous formaldehyde solutions

Process for the direct oxidation of olefins to olefin oxides

PROCESS FOR PREPARING SILVER CATALYSTS

CATALYST COMPOSITION AND PROCESS FOR MAKING THE COMPOSITION

A catalyst composition is provided which can be used for hydrogenating a highly unsaturated hydrocarbon such as an alkyne or a diolefin. The catalyst composition contains palladium, a catalyst component of either silver or an alkali metal compound, or both silver and an alkali metal compound, and a metal aluminate catalyst support. Such metal aluminate catalyst support is prepared by a process of incorporating alumina with a metal component, preferably impregnating alumina with a melted metal component, to thereby provide a metal-incorporated alumina followed by drying and high temperature calcining to thereby provide a metal aluminate catalyst support. The catalyst composition disclosed can be used for hydrogenating a highly unsaturated hydrocarbon to a less unsaturated hydrocarbon. The process involves contacting a highly unsaturated hydrocarbon with a catalyst composition in the presence of hydrogen under a hydrogenation condition sufficient to effect a hydrogenation of the highly unsaturated ...

CATALYTIC PROCESS FOR PREPARING ETHYLENE OXIDE BY OXIDATION OF ETHYLENE

SHELL CATALYSTS, METHOD FOR PRODUCING THE SAME, AND THE USE THEREOF

The invention relates to a shell catalyst with a core and at least one shell surrounding the core, said core being composed of an inert carrier material, and the at least one shell being composed of a porous carrier substance. The shell is physically adhered to the core and the at least one shell contains a catalytically active metal selected from the group of metals of the 10th and 11th group of the periodic table of elements in a finely divided form, or a precursor of the catalytically active metal in a uniformly divided form. The inventive shell catalyst is suitable for reducing unsaturated hydrocarbons and allows for better selectivities in comparison with shell catalysts known so far. The invention further relates to a method for producing the inventive shell catalyst.

MANUFACTURE OF SUPPORTED SILVER CATALYSTS

IRIDIUM-CONTAINING CATALYSTS

Process for producing alkylated aromatic compounds and process for producing phenols

According to a process of the invention, a ketone, an aromatic compound and hydrogen as starting materials are reacted together in a single reaction step to produce an alkylaromatic compound in high yield. A process for producing phenols in the invention includes a step of performing the above alkylation process and does not increase the number of steps compared to the conventional cumene process. The process for producing alkylated aromatic compounds includes reacting an aromatic compound such as benzene, a ketone such as acetone and hydrogen in the presence of a solid acid substance, preferably a zeolite, and a silver-containing catalyst.

Olefin production process

A novel olefin production process is provided which can be established as an industrial and practical process capable of producing olefins by directly reacting a ketone and hydrogen in a single reaction step. In particular, a novel olefin production process is provided in which propylene is obtained with high selectivity by directly reacting acetone and hydrogen. The olefin production process according to the present invention includes reacting a ketone and hydrogen in the presence of at least one dehydration catalyst and a silver-containing catalyst, and the at least one dehydration catalyst is selected from metal oxide catalysts containing a Group 6 element, zeolites, aluminas and heteropoly acid salts in which part or all the protons in heteropoly acids are exchanged with metal cations.

Catalyst and method of manufacture

According to various embodiments, a catalyst composition includes a catalytic metal secured to a porous substrate. The substrate has pores that are templated. The substrate is a product of adding a substrate precursor to a water-in-oil microemulsion including a catalytic metal salt, a solvent, a templating agent, and water.

process for the production of an olefin oxide

The invention provides a process for the epoxidation of an olefin, which process comprises reacting a feed comprising an olefin and oxygen in the presence of a catalyst comprising a carrier and silver deposited on the carrier, which carrier comprises at least 85 weight percent α-alumina and has a surface area of at least 1.3 m 2 /g, a median pore diameter of more than 0.8 μm, and a pore size distribution wherein at least 80% of the total pore volume is contained in pores with diameters in the range of from 0.1 to 10 μm and at least 80% of the pore volume contained in the pores with diameters in the range of from 0.1 to 10 μm is contained in pores with diameters in the range of from 0.3 to 10 μm.

Method for making a catalyst composition

A method for making a catalyst composition suitable for various purposes, such as the reduction of nitrogen oxides, is provided. The method includes combining dawsonite or a dawsonite derivative with a catalytic active element.

Method for producing catalyst-supporting carrier and apparatus for producing same

Disclosed is a method for producing a catalyst-supporting carrier, including a step of supplying subcritical carbon dioxide or supercritical carbon dioxide to a dissolving tank containing a catalyst precursor generated when a catalyst is reduced to dissolve the catalyst precursor in the subcritical carbon dioxide or the supercritical carbon dioxide; a step of supplying the subcritical carbon dioxide or the supercritical carbon dioxide in which the catalyst precursor is dissolved to a supporting tank containing a carrier and reducing the catalyst precursor to cause the catalyst to be supported on the carrier; and a step of supplying the sub-critical carbon dioxide or the supercritical carbon dioxide to the supporting tank containing the carrier on which the catalyst is supported to clean the carrier.

Semiconductor photocatalyst for the photocatalytic reforming of biomass derivatives for hydrogen generation, and preparation and use thereof

Disclosed are a semiconductor photocatalyst for the photocatalytic reforming of biomass derivatives for hydrogen generation, and preparation and use thereof. The semiconductor photocatalyst has the atomic composition ratio of M˜N-Ax; wherein M˜N are IIB group elements to VIA group elements, or IIIA group elements to VA group elements, A being one element or more than two elements selected from the group consisting of cobalt, nickel, iron, copper, chromium, palladium, platinum, ruthenium, rhodium, iridium and silver; and 0.02%≦x≦1.0%. The method of in-situ preparation of the highly effective semiconductor photocatalyst and catalytically reforming biomass derivatives for hydrogen generation by driving photoreaction with visible light via quantum dots is simple, fast, highly effective, inexpensive and practical. The in situ reaction can occur in sunlight without the need of harsh conditions such as calcination.

Electrocatalyst for oxygen reduction including silver/silver halide composite, fuel cell including the same, and preparing method of the same

The present disclosure relates to an electrocatalyst for oxygen reduction including a silver/silver halide composite, a fuel cell including the electrocatalyst for oxygen reduction, and a method for preparing the electrocatalyst for oxygen reduction.

PROCESS FOR TREATING A CARRIER, A PROCESS FOR PREPARING A CATALYST, THE CATALYST, AND USE OF THE CATALYST

A process for treating a carrier, or a precursor thereof, to at least partly remove impurities from the carrier, or the precursor thereof, comprising: contacting the carrier, or the precursor thereof, with a treatment solution comprising a salt in a concentration of at most 0.05 molar, wherein the salt comprises a cation and an anion, and wherein the cation is selected from ammonium, phosphonium, organic cations and combinations thereof, and wherein the anion is selected from organic anions, inorganic carboxylates, oxyanions of elements from Groups IIIA through VIIA of the Periodic Table of Elements, and combinations thereof; and separating at least part of the treatment solution from the carrier, or the precursor thereof. 1. A process for treating a carrier , or a precursor thereof , to at least partly remove impurities from the carrier , or the precursor thereof , comprising:contacting the carrier, or the precursor thereof, with a treatment solution comprising a salt in a concentration of at most 0.05 molar, wherein the salt comprises a cation and an anion, and wherein the cation is selected from ammonium, phosphonium, organic cations and combinations thereof, and wherein the anion is selected from organic anions, inorganic carboxylates, oxyanions of elements from Groups IIIA through VIIA of the Periodic Table of Elements, and combinations thereof; andseparating at least part of the treatment solution from the carrier, or the precursor thereof.2. The process as claimed in claim 1 , wherein the oxyanion is selected from borate claim 1 , metaborate claim 1 , tetraborate claim 1 , tetrafluoroborate claim 1 , carbonate claim 1 , hydrogencarbonate claim 1 , chlorate claim 1 , perchlorate claim 1 , bromate claim 1 , perbromate claim 1 , phosphate claim 1 , metaphosphate claim 1 , orthophosphate claim 1 , hydrogenphosphate claim 1 , dihydrogenphosphate claim 1 , fluorophosphates claim 1 , phosphite claim 1 , hydrogenphosphite claim 1 , sulfate claim 1 , disulfate claim 1 ...

CATALYST AND METHOD OF MANUFACTURE

A catalyst system comprising a first catalytic composition comprising a homogeneous solid mixture containing at least one catalytic metal and at least one metal inorganic support. The pores of the solid mixture have an average diameter in a range of about 1 nanometer to about 15 nanometers. The catalytic metal comprises nanocrystals. 125-. (canceled)26. A method comprising:providing nanocrystals of at least one catalytic metal;incorporating the nanocrystals in at least one metal inorganic support; andforming a first catalytic composition comprising a homogeneous solid mixture containing at least one catalytic metal and at least one metal inorganic support;wherein the pores of the solid mixture have an average diameter in a range of about 1 nanometer to about 15 nanometers.27. The method of claim 26 , wherein the step of providing nanocrystals of the at least one catalytic metal comprises preparing the nanocrystals of the catalytic metal in the presence of a surfactant.28. The method of claim 26 , wherein the step of providing nanocrystals of the catalytic metal is carried out a temperature in a range of about 10 degrees Celsius to about 200 degrees Celsius.29. The method of claim 26 , wherein the step of providing nanocrystals of the catalytic metal is carried out under vacuum in a range of about 0.5 millimeter of mercury to about 10 millimeter of mercury.30. The method of claim 26 , wherein the nanocrystals have a particle size distribution of less than about 20 percent of the solid mixture.31. The method of claim 26 , wherein the catalytic metal is present in an amount less than or equal to about 6 mole percent based on the weight of the homogenous solid mixture.32. (canceled)33. (canceled)34. The method of claim 26 , wherein the catalytic metal comprises silver claim 26 , platinum claim 26 , gold claim 26 , palladium claim 26 , iron claim 26 , nickel claim 26 , cobalt claim 26 , gallium claim 26 , indium claim 26 , ruthenium claim 26 , rhodium claim 26 , osmium ...

CATALYST COMPRISING PALLADIUM AND SILVER, AND ITS APPLICATION FOR SELECTIVE HYDROGENATION

Disclosed are a catalyst, its preparation and use in selective hydrogenation, which catalyst has a porous support grain on which are deposited palladium and silver, and at least one alkali and/or alkaline earth metal; the porous support contains a refractory silica, alumina and/or silica-alumina oxide, where at least 80 wt. % of the palladium is distributed in a crust at the periphery of the support, and at least 80 wt. % of the silver is distributed in a crust at the periphery of the support, the local content of palladium at each point along the diameter of the grain follows the same course as the local content of silver. 1. A catalyst comprising a porous support grain on which are deposited palladium and silver , and at least one metal selected from the group consisting of the alkalis and the alkaline earths , the porous support comprising at least one refractory oxide selected from the group consisting of silica , alumina and silica-alumina , the specific surface area of the porous support being within the range 10 to 150 m/g , the palladium content of the catalyst within the range 0.05 to 0.6 wt. % , the silver content of the catalyst within the range 0.02 to 3 wt. % , at least 80 wt. % of the palladium being distributed in a crust at the periphery of the support , the thickness of the said crust being within the range 10 to 160 μm , at least 80 wt. % of the silver being distributed in a crust at the periphery of the support , the thickness of the said crust being within the range 10 to 160 μm , the local content of palladium at each point along the diameter of the grain following the same course as the local content of silver , the sum of the contents of alkali and/or alkaline earth metals being within the range 0.02 to 5 wt. %.4. A catalyst according to claim 1 , wherein the porous support is alumina.5. A catalyst according to claim 1 , wherein the porous support grain is in the form of beads or extrudates.6. A catalyst according to claim 1 , wherein the said ...

CATALYST COMPOSITION

A catalyst composition comprises a mixed metal catalyst which comprises unalloyed palladium and palladium-gold alloy disposed on a support, wherein the palladium-gold alloy is enriched in gold and at least one promoter in which said promoter comprises at least one reducible metal oxide. 1. A catalyst composition comprising a mixed metal catalyst which comprises unalloyed palladium and palladium-gold alloy disposed on a support , wherein the palladium-gold alloy is enriched in gold and at least one promoter in which said promoter comprises at least one reducible metal oxide.2. A catalyst composition according to claim 1 , wherein the atomic ratio of Pd:Au in the mixed metal catalyst is from 100:1 to 1:100.3. A catalyst composition according to claim 1 , wherein the weight ratio of Pd:Au in the mixed metal catalyst is >1:1.4. A catalyst composition according to claim 1 , wherein the amount of palladium and gold in the mixed metal catalyst is from 0.5-10 wt %.5. A catalyst composition according to claim 1 , wherein the at least one reducible metal oxide is at least one oxide of manganese claim 1 , iron claim 1 , tin claim 1 , copper claim 1 , cobalt claim 1 , titanium and cerium.6. A catalyst composition according to claim 5 , wherein the at least one reducible metal oxide is at least one oxide of iron and cerium.7. A catalyst composition according to claim 6 , wherein the at least one reducible metal oxide is ceria.8. A catalyst composition according to claim 1 , wherein the at least one promoter is the support for the mixed metal catalyst.9. A catalyst composition according to claim 8 , wherein the promoter and support is ceria.10. A catalyst composition according to claim 8 , wherein the promoter and support is a mixed oxide or composite oxide of particulate ceria with alumina.11. A catalyst composition according to claim 1 , wherein the support is alumina claim 1 , magnesia claim 1 , silica-alumina claim 1 , zirconia claim 1 , a zeolite or a mixture claim 1 , ...

HYDRAULIC MUSCLE FROM HOLLOW WRAPPED CARBON NANOTUBE YARN

A hydraulic muscle comprises a hollow carbon nanotube (CNT) yarn tube comprising: a plurality of CNT sheets twisted and wrapped in form of a hollow tube; and a binding agent infiltrated in the plurality of CNT sheets that binds the plurality of the CNT sheets together. A method of manufacturing a hydraulic muscle comprises: twisting and wrapping a plurality of carbon nanotube (CNT) sheets around a core fiber; infiltrating a binding agent in between the plurality of CNT sheets, wherein the binding agent binds the plurality of the CNT sheets together; and removing the core fiber from the plurality of CNT sheets. 1. A hydraulic muscle comprising: a plurality of CNT sheets twisted and wrapped in form of a hollow tube; and', 'a binding agent infiltrated in the plurality of CNT sheets that binds the plurality of the CNT sheets together., 'a hollow carbon nanotube (CNT) yarn tube comprising2. The hydraulic muscle according to claim 1 , whereinthe inner diameter of the CNT yarn tube increases when a fluid applies an internal pressure inside the CNT yarn tube, anda length of the CNT yarn tube decreases linearly.3. The hydraulic muscle according to claim 2 , further comprising a spring claim 2 , whereinthe plurality of CNT sheets are wrapped around the spring.4. The hydraulic muscle according to claim 2 , wherein the plurality of CNT sheets are aligned to a bias angle not equal to 90 degrees.5. The hydraulic muscle according to claim 2 , wherein the plurality of CNT sheets have a net bias angle of 90 degrees.6. The hydraulic muscle according to claim 1 , whereinthe plurality of CNT sheets are aligned to a bias angle not equal to 90 degrees,both ends of the CNT yarn tube are prevented from rotating, andwhen an internal pressure inside the CNT yarn tube is applied, the CNT yarn tube creates a torque inside the CNT yarn tube such that the CNT yarn tube snarls along a length of the CNT yarn tube.7. The hydraulic muscle according to claim 1 , whereinthe CNT yarn tube has a shape ...

Palladium Catalysts Supported on Carbon for Hydrogenation of Aromatic Hydrocarbons

Provided is a process for preparing partially or fully hydrogenated hydrocarbons through hydrogenation of aromatic hydrocarbons in the presence of a hydrogenation catalyst. The hydrogenation catalyst comprises palladium deposited on carbon with optional acid wash and calcination treatments and with optional additions of silver and/or alkali metals. 1. A chemical catalyst , comprising an acid-washed carbon base and palladium deposited on said carbon base.2. The chemical catalyst of claim 1 , wherein said carbon base is an activated carbon base.3. The chemical catalyst of claim 1 , wherein said carbon base is calcinated before said palladium is deposited thereon.4. The chemical catalyst of claim 1 , wherein said catalyst comprises from about 0.1 to about 5 weight percentage of palladium.5. The chemical catalyst of claim 1 , further comprising a metal additive deposited on said carbon base with said palladium.6. The chemical catalyst of claim 5 , wherein the molar ratio of said palladium to said metal additive is in a range of from 1:1 to 12:1.7. The chemical catalyst of claim 5 , wherein said metal additive comprises a metal selected from the group consisting of alkali metals and silver.8. A method of making a chemical catalyst claim 5 , comprising the steps of:(i) dissolving a first precursor in deionized water to form a solution;(ii) depositing said solution onto an acid-washed carbon base; and(iii) drying said carbon base in the presence of static air.9. The method of claim 8 , wherein step (ii) is conducted according to the incipient wetness method.10. The method of claim 8 , wherein said carbon base is an activated carbon base.11. The method of claim 8 , further comprising the step of calcining said carbon base prior to the performance of step (ii).12. The method of claim 11 , wherein no calcination treatment is applied to said carbon base following the performance of step (ii).13. The method of claim 11 , wherein said calcining step involves subjecting said ...

Method of removing hydrogen peroxide from sulfuric acid

A method of removing hydrogen peroxide from sulfuric acid includes pouring sulfuric acid (HSO) having 0.1% to 10% of hydrogen peroxide (HO) into a vessel; adding a catalyst containing metal or metal compound to the vessel to undergo a reaction with the sulfuric acid (HSO) to remove hydrogen peroxide (HO) from the sulfuric acid (HSO), to generate heat, and to generate metal ions in the sulfuric acid (HSO); activating a cooling device to cool the vessel to a predetermined temperature range; adding sulfur (S) to the vessel to undergo a reaction with the metal ions to generate metallic sulfide; and purifying the metal free sulfuric acid (HSO) to obtain the metallic sulfide and highly purified, diluted sulfuric acid (HSO) as products. 1. A method of removing hydrogen peroxide from sulfuric acid , comprising the steps of:{'sub': 2', '4', '2', '2, '(i) pouring sulfuric acid (HSO) having 0.1% to 10% of hydrogen peroxide (HO) into a vessel;'}{'sub': 2', '4', '2', '2', '2', '4', '2', '4, '(ii) adding a catalyst containing metal or metal compound to the vessel to undergo a reaction with the sulfuric acid (HSO) to remove hydrogen peroxide (HO) from the sulfuric acid (HSO), to generate heat, and to generate metal ions in the sulfuric acid (HSO);'}(iii) activating a cooling device to cool the vessel to a predetermined temperature range;{'sup': '2−', '(iv) adding sulfur (S) to the vessel to undergo a reaction with the metal ions to generate metallic sulfide; and'}{'sub': 2', '4', '2', '4, '(v) purifying the metal free sulfuric acid (HSO) to obtain the metallic sulfide and highly purified, diluted sulfuric acid (HSO) as products.'}2. The method of removing hydrogen peroxide from sulfuric acid of claim 1 , wherein in step (ii) the catalyst is copper (Cu).3. The method of removing hydrogen peroxide from sulfuric acid of claim 1 , wherein in step (ii) the catalyst is copper compound.4. The method of removing hydrogen peroxide from sulfuric acid of claim 1 , wherein in step (ii) the ...

CATALYST BED COMPRISING SILVER CATALYST BODIES AND PROCESS FOR THE OXIDATIVE DEHYDROGENATION OF OLEFINICALLY UNSATURATED ALCOHOLS

The present invention relates to a catalyst bed comprising silver catalyst bodies and a reactor comprising such a catalyst bed. Further, the invention relates to the use of the catalyst bed and the reactor for gas phase reactions, in particular for the oxidative dehydrogenation of organic compounds under exothermic conditions. In a preferred embodiment, the present invention relates to the preparation of olefinically unsaturated carbonyl compounds from olefinically unsaturated alcohols by oxidative dehydrogenation utilizing a catalyst bed comprising metallic silver catalyst bodies. 118.-. (canceled)19. A process for the preparation of an olefinically unsaturated carbonyl compound in a tubular reactor comprising a plurality of reactor tubes , comprising reacting an olefinically unsaturated alcohol with oxygen in the presence of a catalyst bed , comprising full-metallic silver catalyst bodies , wherein the catalyst bed has a packing density of the full-metallic silver catalyst bodies in the range of 3.0 g/cmto 10.0 g/cm.20. The process according to claim 19 , wherein the catalyst bed has a packing density of the full-metallic silver catalyst bodies in the range of 5.5 g/cmto 10.0 g/cm.21. The process according to claim 19 , wherein the catalyst bed has a void space ratio in the range of 5% to 70% claim 19 , based on the volume of the catalyst bed not occupied by the catalyst bodies per volume of the catalyst bed.22. The process according to claim 19 , wherein the full-metallic silver catalyst bodies have a mean particle size of 0.5 mm to 5.0 mm.23. The process according to claim 19 , wherein the full-metallic silver bodies have a cylindrical shape or spherical shape or sphere-like shape or combinations thereof.24. The process according to claim 19 , wherein the full-metallic silver bodies have a geometric surface area in the range of 100 mm/g to 600 mm/g.25. The process according to claim 19 , wherein the catalyst bed is located in a tube reactor.26. The process ...

HYBRID NANOSTRUCTURED PHOTOCATALYSTS AND PREPARATION METHOD THEREOF

The present invention relates to a hybrid nanostructured photocatalyst, comprising a first nanoparticle comprising silver halide (AgX); a second nanoparticle, which is formed on an outer surface of the first nanoparticle and comprises Ag; and a polymer formed on any one outer surface of the first nanoparticle and the second nanoparticle, and a preparation method thereof. Specifically, the present invention provides a hybrid nanostructured photocatalyst having a high photocatalytic activity in a visible light region and a preparation method thereof. 1. A hybrid nanostructured photocatalyst , comprising:a first nanoparticle comprising silver halide (AgX), wherein X is any of Cl, Br, and I;multiple second nanoparticles in a dendritic form on an outer surface of the first nanoparticle and comprising Ag; anda polymer formed on any one outer surface of the first nanoparticle and the multiple second nanoparticles.2. The hybrid nanostructured photocatalyst of claim 1 , wherein the first nanoparticle has at least one shape selected from the group consisting of a semi-sphere claim 1 , a sphere claim 1 , a truncated-cube claim 1 , and a cube.3. The hybrid nanostructured photocatalyst of claim 1 , wherein the second nanoparticle is formed on the outer surface of the first nanoparticle claim 1 , and the shape of the hybrid nanostructured photocatalyst is formed to correspond to the shape of the first nanoparticle.4. The hybrid nanostructured photocatalyst of claim 1 , wherein at least a part of the first nanoparticle and the second nanoparticle has a crystal structure.5. The hybrid nanostructured photocatalyst of claim 1 , wherein at least a part of the first nanoparticle and the second nanoparticle has a face-centered cubic structure.6. The hybrid nanostructured photocatalyst of claim 1 , wherein the photocatalyst has a band gap energy of 2.0 eV to 3.0 eV and a photocatalytic activity in a visible light region.7. (canceled)8. The hybrid nanostructured photocatalyst of claim 1 , ...

METHOD

The present invention relates to methods of immobilising metals on polymeric surfaces using surfactants and to products that can be formed by such methods. Polymer substrates with metal immobilised on the surface are very useful in a variety of applications. The metal is usually in the form of a nanoparticle. A major use of the invention is in catalysts. The invention can also be used in medical applications, such as to make antimicrobial surfaces. 1. A method of immobilising metals on a polymeric substrate , the method comprising the steps of:(1) providing a polymeric substrate that has a surface;(2) treating the surface with an aqueous surfactant solution under conditions that lead to surfactant being partially absorbed into the surface; then(3) adding to the surface a metal salt solution, so that ions of the metal salt become associated with partially absorbed surfactant; and(4) adding to the metal salt solution on the surface a reducing agent, so that metal ions in the metal salt solution are reduced to metal particles.2. A method according to claim 1 , wherein the surface of the polymeric substrate is hydrophobic.3. A method according to claim 1 , wherein the polymeric substrate is a polyolefin claim 1 , preferably wherein the polymeric substrate is polypropylene or polyethylene.4. A method according to claim 1 , wherein the polymeric substrate is microporous.5. A method according to claim 1 , wherein the aqueous surfactant solution comprises a cationic surfactant claim 1 , preferably wherein the aqueous surfactant solution comprises benzalkonium chloride claim 1 , benzyl-dodecyl-dimethylammonium bromide claim 1 , benzyl dimethyloctadecylazanium chloride claim 1 , benzylhexadecyldimethylazanium chloride or thonzonium bromide.6. A method according to claim 1 , wherein the metal salt solution comprises an iron claim 1 , nickel claim 1 , platinum claim 1 , rhenium claim 1 , vanadium claim 1 , rhodium or silver salt claim 1 , preferably wherein the metal salt ...

SILVER CATALYST SYSTEM HAVING A REDUCED PRESSURE DROP FOR THE OXIDATIVE DEHYDROGENATION OF ALCOHOLS

The invention relates to a silver-comprising catalyst system for the preparation of aldehydes and/or ketones by oxidative dehydrogenation of alcohols, in particular the oxidative dehydrogenation of methanol to form formaldehyde, comprising a first catalyst layer and a second catalyst layer, wherein the first catalyst layer consists of a silver-comprising material in the form of balls of wire, gauzes or knitteds having a weight per unit area of from 0.3 to 10 kg/mand a wire diameter of from 30 to 200 μm and the second catalyst layer consists of a silver-comprising material in the form of granular material having an average particle size of from 0.5 to 5 mm and the two catalyst layers are in direct contact with one another. The invention further relates to a corresponding process for the preparation of aldehydes and/or ketones, in particular of formaldehyde, by oxidative dehydrogenation of corresponding alcohols over a silver-comprising catalyst system. 112.-. (canceled)14. The silver-comprising catalyst system according to claim 13 , wherein the silver-comprising material of the catalyst layer A has a weight per unit area in the range from 0.3 to 3 kg/mfor the entire catalyst layer A.15. The silver-comprising catalyst system according to claim 13 , wherein the silver-comprising material of the catalyst layer A has a wire diameter in the range from 30 μm to 150 μm.16. The silver-comprising catalyst system according to claim 13 , wherein the balls of wire claim 13 , gauzes and knitteds of the catalyst layer A consist of wires which are silver-comprising fibers or threads having an essentially circular cross section.17. The silver-comprising catalyst system according to claim 13 , wherein the silver-comprising material of the catalyst layer B has an average particle size in the range from 0.75 mm to 4 mm.18. The silver-comprising catalyst system according to claim 13 , wherein the silver-comprising material of the catalyst layer A has a silver content of >98% by weight. ...

CATALYST CARRIER MODULE FOR LARGE-CAPACITY CATALYTIC REACTOR

Provided is a catalyst carrier module for a large-capacity catalyst reactor, which can be assembled in a large-capacity structure by laminating a flat plate and a wave plate to be fixed in a can without brazing the flat plate and the wave plate constituting a cell forming body, for use in a catalytic reactor requiring a large-capacity exhaust gas treatment. The catalyst carrier module (or block) includes: a can of a rectangular tube shape having an inlet and an outlet; at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; and a fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can. 1. A catalyst carrier module comprising:a can of a rectangular tube shape having an inlet and an outlet;at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; anda fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can.2. The catalyst carrier module of claim 1 , wherein the fixing unit comprises a plurality of fixing bars installed at the inlet and the outlet of the can to prevent the at least one cell forming body from being detached from the can.3. The catalyst carrier module of claim 2 , wherein each of the plurality of fixing bars is fixed to both sides of the can using a fastening member.4. The catalyst carrier module of claim 2 , wherein each of the plurality of fixing bars is bonded to the can by one of brazing claim 2 , welding claim 2 , soldering claim 2 , and diffusion bonding.5. The catalyst carrier module of claim 1 , wherein the fixing unit comprises first to fourth fixing members both sides of which ...

Optimization of Zero-PGM Washcoat and Overcoat Loadings on Metallic Substrate

The present disclosure refers to a plurality of process employed for optimization of Zero-PGM washcoat and overcoat loadings on metallic substrates. According to an embodiment a substantial increase in conversion of HC and CO may be achieved by optimizing the total washcoat and overcoat loadings of the catalyst. According to another embodiment, the present disclosure may provide solutions to determine the optimum total washcoat and overcoat loadings for minimizing washcoat adhesion loss. As a result, may increase the conversion of HC and CO from discharge of exhaust gases from internal combustion engines, optimizing performance of Zero-PGM catalyst systems. 1. A method for optimizing a catalytic system , comprising: a substrate;', 'a washcoat suitable for deposition on the substrate, comprising at least one first oxide solid comprising alumina and at least one first zero platinum group catalyst comprising silver; and', 'an overcoat suitable for deposition on the substrate, comprising at least one second oxide solid selected from the group consisting of a carrier material oxide, at least one second zero platinum group catalyst comprising one selected from the group consisting of copper oxide, ceria, and combinations thereof, and a mixture thereof;, 'providing a catalyst system, comprisingadjusting an amount of loading of the washcoat and the overcoat in accordance with washcoat adhesion loss.2. The method according to claim 1 , wherein the silver is present at about 5.5 g/L.3. The method according to claim 1 , wherein the copper is present at about 6.5 g/L.4. The method according to claim 1 , wherein the amount of washcoat loading is about 80 g/L and the amount of overcoat loading is about 60 g/L.5. The method according to claim 4 , wherein the washcoat adhesion loss is less than 4.0%.6. The method according to claim 1 , wherein the amount of washcoat loading is about 100 g/L and the amount of overcoat loading is about 800 g/L.7. The method according to claim 6 , ...

EPOXIDATION PROCESS

A method for producing ethylene oxide comprising: a) providing one or more feed components, wherein the one or more feed components contains at least ethylene obtained by dehydrating ethanol; b) contacting the one or more feed components with an ethylene oxide catalyst bed disposed in a reactor tube, the ethylene oxide catalyst bed comprising: (1) an upstream ethylene oxide catalyst having a first cesium concentration and (2) a downstream ethylene oxide catalyst having a second cesium concentration, wherein the first cesium concentration is higher than the second cesium concentration. 1. A method for producing ethylene oxide comprising:a) providing one or more feed components, wherein the one or more feed components contain at least ethylene;b) contacting the one or more feed components with an ethylene oxide catalyst bed disposed in a reactor tube, the ethylene oxide catalyst bed comprising: (1) an upstream ethylene oxide catalyst having a first cesium concentration and (2) a downstream ethylene oxide catalyst having a second cesium concentration, wherein the first cesium concentration is higher than the second cesium concentration.2. The method of claim 1 , wherein the ethylene is obtained by dehydrating ethanol.3. The method of claim 1 , wherein the ethylene is obtained from petroleum sources.4. The method of claim 1 , wherein the ethylene oxide catalyst bed comprises from about 10 wt % to about 90 wt % of the upstream ethylene oxide catalyst and about 10 wt % to about 90 wt % of the downstream epoxidation catalyst.5. The method of claim 1 , wherein the first cesium concentration is from about 200 ppm to about 1000 ppm and the second cesium concentration is from about 100 ppm to about 700 ppm.6. The method according to claim 1 , wherein the one or more feed components further comprises oxygen and a ballast gas.7. A system for producing ethylene oxide comprising:(a) a source of ethylene;(b) an ethylene oxide reactor containing a plurality of reactor tubes; and(c) ...

SILVER AND TITANIUM DIOXIDE BASED OPTICALLY TRANSPARENT ANTIMICROBIAL COATINGS AND RELATED METHODS

Methods of reducing microbial attachment to a surface are provided, including methods comprising illuminating a surface comprising a substrate and a coating on the substrate with ultraviolet light, wherein the coating comprises anatase titanium dioxide nanoparticles functionalized with silver nanoparticles and is optically transparent to visible light; and exposing the illuminated surface to microbes. The coating exhibits a reduction in microbial attachment as compared to the coating absent the illumination. 1. A method of reducing microbial attachment to a surface , the method comprising:illuminating a surface comprising a substrate and a coating on the substrate with ultraviolet light, wherein the coating comprises anatase titanium dioxide nanoparticles functionalized with silver nanoparticles and is optically transparent to visible light; andexposing the illuminated surface to microbes,wherein the coating exhibits a reduction in microbial attachment as compared to the coating absent the illumination.2. The method of claim 1 , wherein the reduction in microbial attachment is at least 30%.3. The method of claim 1 , wherein the reduction in microbial attachment is at least 40%.4Escherichia coli. The method of claim 1 , wherein the coating exhibits an ATCC 25922 attachment of no greater than 30 cells/1.5×10μmunder illumination from a 1 claim 1 ,000 W xenon arc lamp for 45 minutes.5. The method of claim 1 , wherein the reduction is an initial reduction and further comprising repeating the illumination and exposure steps at least one additional time claim 1 , wherein the additional illumination step regenerates the coating to provide a subsequent reduction in microbial attachment after the additional exposure step.6. The method of claim 5 , wherein the subsequent reduction is the same as the initial reduction.7. The method of claim 1 , wherein the substrate is a display screen.8. The method of claim 1 , wherein the coating consists essentially of the anatase titanium ...

CATALYTIC TEST PAPER PREPARED BY COMPOSITING METAL PARTICLE-EMBEDDED BACTERIAL CELLULOSE WITH PLANT FIBERS, AND METHOD THEREFOR

Disclosed is a catalytic test paper prepared by compositing metal particle-embedded bacterial cellulose with plant fibers, and a preparation method therefor. Hydroxyl groups of bacterial cellulose are bonded with a nitrogen-containing or phosphorus-containing organic small molecule compound. By means of a chelation between a nitrogen or phosphorus atom with a metal, transition metal ions are adsorbed to a nanoporous surface of bacterial cellulose, and the transition metal ions are reduced in situ to obtain bacterial cellulose embedded with metal nanoparticles. The bacterial cellulose is composited with the plant fiber, and the catalytic test paper is prepared by a papermaking method. The catalytic test paper has the advantages of convenient use and recovery, high reusability, simple design, low manufacturing cost, higher catalytic efficiency, a green degradable support material, etc. 1. A method for preparing a catalytic test paper by compositing metal particle-embedded bacterial cellulose with plant fibers , characterized in that , the method comprises the following steps:(1) chemically bonding a nitrogen-containing or phosphorus-containing organic small molecule compound with hydroxyl groups in a structure of bacterial cellulose to obtain a functionalized bacterial cellulose having a nitrogen or phosphorus-containing group;(2) preparing an aqueous solution of an inorganic salt of a transition metal, adding the aqueous solution into the functionalized bacterial cellulose prepared in the step (1), stirring and reacting according to a solubility of the inorganic salt of the transition metal until the nitrogen-containing or phosphorus-containing group adsorbs transition metal ions onto a nanoporous surface of the bacterial cellulose till saturation, separating and washing with water;(3) reducing the transition metal ions adsorbed on the surface of the bacterial cellulose in the step (2) in situ to obtain bacterial cellulose embedded with transition metal nanoparticles ...

APPARATUS AND METHOD FOR ETCHING SUBSTRATE, STAMP FOR ETCHING SUBSTRATE AND METHOD FOR MANUFACTURING THE SAME

The inventive concepts relate to an apparatus and a method for etching a substrate, a stamp for etching a substrate, and a method for manufacturing the stamp. The method for etching a substrate includes bringing a substrate into contact with a stamp including a pattern on which a metal catalyst is formed, and etching the substrate by a chemical reaction between the metal catalyst and an etching solution.

POROUS BODIES WITH ENHANCED PORE ARCHITECTURE

A porous body is provided with enhanced fluid transport properties that is capable of performing or facilitating separations, or performing reactions and/or providing areas for such separations or reactions to take place. The porous body includes at least 80 percent alpha alumina and has a pore volume from 0.3 mL/g to 1.2 mL/g and a surface area from 0.3 m/g to 3.0 m/g. The porous body further includes a pore architecture that provides at least one of a tortuosity of 7.0 or less, a constriction of 4.0 or less and a permeability of 30 mdarcys or greater. The porous body can be used in a wide variety of applications such as, for example, as a filter, as a membrane or as a catalyst carrier. 1. A precursor mixture for producing a porous body , the precursor mixture comprising:(i) at least one milled alpha alumina powder having a particle size of 0.1 microns to 6 microns,(ii) a non-silicate binder, and(iii) at least one principle burnout material having a particle size of 1 micron to 10 microns.2. The precursor mixture of claim 1 , wherein the least one milled alpha alumina powder claim 1 , the non-silicate binder claim 1 , and the at least one principle burnout material are in a homogeneous mixture.3. The precursor mixture of claim 1 , wherein the at least one principle burnout material is a granulated polyolefin.4. The precursor mixture of claim 3 , wherein the granulated polyolefin is one of polyethylene and polypropylene.5. The precursor mixture of claim 1 , further comprising unmilled alpha alumina powder.6. The precursor mixture of claim 5 , wherein the unmilled alpha alumina powder has an average particle size from 10 microns to 100 microns.7. The precursor mixture of claim 5 , wherein a weight ratio of the milled alpha alumina powder to the unmilled alpha alumina powder is from about 0.25:1 to 5:1.8. The precursor mixture of claim 5 , further comprising an additional unmilled alpha alumina powder having a particle size greater the particle size of the unmilled ...

Exhaust gas purification device for internal combustion engine

An exhaust gas purification device is equipped with: an NOx purification unit disposed in exhaust gas piping of an engine supporting an NOx storage catalyst (NSC); a catalyzed soot filter (CSF) disposed downstream of the NOx purification unit supporting a particulate combustion catalyst causing captured particulates to combust; and an electronic control unit (ECU) which controls exhaust gas flowing into the NSC to be rich and which, by raising the temperature of the NSC, acts as a regeneration device that causes sulfur components captured in the NSC to be desorbed. The particulate combustion catalyst is provided where Ag and Pd have been alloyed on an Al 2 O 3 carrier; the quantity of Ag supported by the Al 2 O 3 carrier is 1.2-2.5 g/L; the quantity of Pd supported by the Al 2 O 3 carrier is 0.7 g/L or less; and the ratio Ag/Pd of the Ag support quantity to the Pd support quantity is 1.7-8.3.

SUPPORTED BIMETALLIC CORE-SHELL STRUCTURE CATALYST AND ITS PREPARATION METHOD

The purpose of the invention is to provide a supported bimetallic core-shell structure catalyst and its preparation method. Supporter, metal salt and reducing agent solution are mixed to synthesize the catalyst M@PdM/ZT by using a one-step synthesis method, wherein the active metal particle M@PdM as core-shell structure, M Is the core representing one of the Ag, Pt, Au and Ir. ZT is the supporter, representing one of hydrotalcite (MgAl-LDH), alumina (AlO) and silica (SiO). By changing the temperature and the reaction time to control the kinetic behavior of the reduction of two kinds of metal ions to realize the construction of core-shell structure. Active metal particle composition and shell thickness are regulated by controlling metal ion concentration. The bimetallic core-shell catalyst prepared by this method showed excellent selectivity and stability in acetylene selective hydrogenation and anthraquinone hydrogenation. 1. A preparation method of supported bimetallic core-shell catalyst comprising:{'sub': 3', '6', '5', '7', '2', '2', '2', '6', '2', '5', '7', '2', '3', '4', '2', '2', '3', '2', '5', '7', '2', '2', '3', '2', '2', '3', '2, 'adding M salt and Pd salt to a reducing solution to obtain a mixed salt solution after ultrasonic irradiation for 4-5 min; wherein a total concentration of M and Pd ions is 0.01-20 mmol/L, a molar ratio of M:Pd ions is 0.1 to 10; M is one of Ag, Pt, Au and Ir; M salt is one of AgNO, HPtCl, Pt(CHO), HIrCl.6HO, Ir(CHO)and HAuCl.4HO; Pd salt is one of the PdCl, Pd(NO), Pd(CHO), Pd(CHCOO); the reducing solution is a mixture of reducing agent and deionized water, wherein, a mass ratio of the deionized water is 0-20%; the reducing agent is one of ethylene glycol, isopropanol, N, n-dimethyl acetamide, N, n-dimethyl formamide and glyceraldehyde; stirring and heating the mixed salt solution for 10-30 min under 40-50° C., adding a supporter and continuing to stir for 10-20min; raising temperature to 100-160° C. and keeping the temperature ...

METHOD FOR THE DEPOSITON OF METALS ON SUPPORT OXIDES

The present invention is directed to a process for the production of supported transition metals with high dispersion. The latter are deposited onto refractory oxides without using a further liquid solvent. Hence, according to this dry procedure no solvent is involved which obviates certain drawbacks connected with wet ion exchange, impregnation or other metal addition processes known in the art. 2. A process according to claim 1 , wherein the metal is selected from the group of Pd claim 1 , Pt claim 1 , Rh claim 1 , Ir claim 1 , Ru claim 1 , Ag claim 1 , Au claim 1 , Cu claim 1 , Fe claim 1 , Mn claim 1 , Mo claim 1 , Ni claim 1 , Co claim 1 , Cr claim 1 , V claim 1 , W claim 1 , Nb claim 1 , Y claim 1 , La (lanthanides) or mixtures thereof.3. A process according to claim 1 , wherein the complex ligand is selected from one or a mixture of the group comprising a diketonate-structure claim 1 , carbonyl species claim 1 , acetates claim 1 , and alkenes.4. A process according to claim 1 , wherein the mixture is calcined at a temperature of 250-450° C. for 10 mins-4 hours.5. A process according to claim 1 , wherein the mixture comprises the refractory oxide and the precursor compound to provide a subsequent metal loading on the oxide of 0.01 wt % metal to 20 wt % metal.6. A material or mixture of materials obtained according to .7. A catalyst comprising the material or mixture of materials according to .8. A catalyst according to claim 7 , wherein the material or mixture of materials and optionally further materials are coated in zones on a substrate.9. A monolith catalyst formed via extrusion of the material or mixture of materials of .10. A process for the abatement of exhaust pollutants comprising subjecting an exhaust with exhaust pollutants to the material or mixture of materials of . The present invention is directed to a process for the production of highly dispersed, oxide supported transition metal (TM) catalysts. The TM elements are deposited onto refractory ...

BASIC CATALYST SUPPORT BODY HAVING A LOW SURFACE AREA

A catalyst support body containing an SiO-containing material and a metal selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals and mixtures thereof, wherein the total metal content lies in the range of from 0.5 to 10 wt.-%, relative to the total weight of the catalyst support. Also, a catalyst that comprises a catalyst support body according to the invention and a catalytically active metal, in particular palladium and/or gold. Also, a method for producing a catalyst support, wherein an SiO-containing material is treated with a metal-containing compound, dried and then calcined. Also, a method for producing a catalyst, in which a solution having a precursor compound of a catalytically active metal is applied to a catalyst support body. 1. A catalyst support body containing an SiO-containing material and a metal selected from the group consisting of alkali metals , alkaline earth metals , rare earth metals and mixtures thereof , wherein the total metal content lies in the range of from 0.5 to 10 wt.-% , relative to the total weight of the catalyst support body , and wherein the BET surface area of the catalyst support body lies in the range of from 50 to 150 m/g.2. The catalyst support body according to claim 1 , wherein the catalyst support body is present in the form of spheres or rings.3. The catalyst support body according to claim 1 , having an average pore radius in the range of from 12 to 30 nm.4. The catalyst support body according to claim 1 , having a total pore volume in the range of from 280 to 550 mm/g.5. The catalyst support body according to claim 1 , having a bulk density in the range of from 0.8 to 1.2 g/cm.6. The catalyst support body according to claim 1 , having BET surface area in the range of from 50 to 140 m/g.7. The catalyst support body according to claim 1 , having a basicity in the range of from 100 to 800 μval/g.8. The catalyst support body according to claim 1 , wherein the metal is Li claim 1 , Na ...

PROCESS FOR THE PREPARATION OF NANOPARTICLES OF NOBLE METALS IN HYDROGEL AND NANOPARTICLES THUS OBTAINED

There is described a versatile and environment-friendly one-pot process for the preparation of nanoparticles of noble metals in hydrogel, obtainable at room temperature using quaternized hydroxyethylcellulose. 1. Hydrogel comprising water , at least one quaternary ammonium salt of hydroxyethylcellulose , and nanoparticles of at least one metal , wherein:said at least one metal is selected from Au, Ag, Cu, Pd, Pt, and mixtures thereof,said at least one quaternary ammonium salt of hydroxyethylcellulose is selected from polyquaternium-4, polyquatemium-10, polyquaternium-24 and polyquaternium-67,said nanoparticles of at least one metal of said nanoparticles have an average particle size distribution D50 of 10-100 nm, and are in a concentration of 0.3-5% m/m of the hydrogel.2. The hydrogel of claim 1 , wherein said at least one quaternary ammonium salt of hydroxyethylcellulose and said metal are in a molar ratio from 1:1 to 10:1.3. The hydrogel of claim 2 , wherein said at least one quaternary ammonium salt of hydroxyethylcellulose and said metal are in a molar ratio from 1.1:1 to 7:1.4. The hydrogel of claim 1 , wherein said at least one quaternary ammonium salt of hydroxyethylcellulose is polyquaternium-67.5. The hydrogel of claim 1 , wherein said metal is Ag or Au.6. Process for the preparation of hydrogel of nanoparticles of at least one metal of claim 1 , comprising the steps of:a) providing an aqueous solution of an inorganic salt of at least one metal,b) providing an aqueous solution of at least one quaternary ammonium salt of hydroxyethylcellulose,c) combining the solutions and mixing under stirring at room temperature, andd) reacting at room temperature for at least 5 hours, thus obtaining the hydrogel.7. The process of claim 6 , wherein in step c) pH is adjusted to basic pH.8. The process of claim 7 , wherein pH is adjusted by adding an inorganic base claim 7 , said base and said at least one metal being in a molar ratio from 1:1 to 5:1.9. Hydrogel obtainable ...

Etching method, method of manufacturing semiconductor chip, and method of manufacturing article

An etching method according to an embodiment includes forming a catalyst layer made of a first noble metal or the combination of the second noble metal and the metal other than noble metals on a surface made of a semiconductor, the catalyst layer including a first portion and a second portion, the first portion covering at least a part of the surface, the second portion being located on the first portion, having an apparent density lower than that of the first portion, and being thicker than the first portion; and supplying an etchant to the catalyst layer to cause an etching of the surface with an assist from the catalyst layer as a catalyst.

PROCESS FOR PREPARING AN OLEFIN OXIDE USING A MULTI-LOBED POROUS CERAMIC BODY

A carrier having at least three lobes, a first end, a second end, a wall between the ends and a non-uniform radius of transition at the intersection of an end and the wall is disclosed. A catalyst comprising the carrier, silver and promoters deposited on the carrier and useful for the epoxidation of olefins is also disclosed. A method for making the carrier, a method for making the catalyst and a process for epoxidation of an olefin with the catalyst are also disclosed. 127-. (canceled)28. A process for preparing an olefin oxide by reacting a feed comprising an olefin and oxygen in the presence of a catalyst comprising a porous ceramic body , silver and one or more promoters useful for the epoxidation of olefins , wherein said porous ceramic body comprises a first end , a second end , and a wall disposed between and intersecting said ends , said wall comprising at least three lobes and at least three valleys formed in the length of the wall , each valley located between two of said three lobes , said lobes rounded at the intersection of said first end and said wall , and said valleys not rounded at the intersection of said first end and said wall.29. The process as claimed in claim 28 , wherein the olefin comprises ethylene.30. A process for preparing a 1 claim 28 ,2-diol claim 28 , a 1 claim 28 ,2-diol ether claim 28 , a 1 claim 28 ,2-carbonate claim 28 , or an alkanolamine comprising converting an olefin oxide into the 1 claim 28 ,2-diol claim 28 , the 1 claim 28 ,2-diol ether claim 28 , the 1 claim 28 ,2-carbonate claim 28 , or the alkanolamine claim 28 , wherein the olefin oxide has been prepared by reacting a feed comprising an olefin and oxygen in the presence of a catalyst comprising a porous ceramic body claim 28 , silver and one or more promoters useful for the epoxidation of olefins claim 28 , wherein said porous ceramic body comprises a first end claim 28 , a second end claim 28 , and a wall disposed between and intersecting said ends claim 28 , said wall ...

PLATED OBJECT AND METHOD OF FORMING THE SAME

The invention relates to a method of forming a plated object comprising forming an electrically conductive layer on a surface of a substrate, providing a catalyst on or in contact with the electrically conductive layer and contacting the catalyst with an electroless plating bath solution to form a metallic layer over the substrate. In particular, the electrically conductive layer comprises a conductive carbon material of reduced graphene oxide; and the catalysts include palladium or silver. 1. A method of forming a plated object , the method comprising:forming an electrically conductive layer on a surface of a substrate;providing a catalyst on the electrically conductive layer; andcontacting the catalyst with an electroless plating bath solution to form a metallic layer over the substrate, thereby forming the plated object;wherein a density of the catalyst relative to the electrically conductive layer is less than 1 microgram per centimeter square.2. The method according to claim 1 ,wherein the substrate is electrically non-conductive.3. The method according to claim 1 ,wherein the electrically conductive layer comprises a conductive carbon material or a conductive polymer.4. The method according to claim 3 ,wherein the conductive carbon material is any one selected from a group consisting of graphene, reduced graphene oxide, carbon nanotubes, and carbon powder.5. The method according to claim 4 ,wherein the conductive carbon material is reduced graphene oxide; and dipping the substrate in a mixture comprising graphene oxide; and', 'dipping the substrate adhered with graphene oxide in a reducing agent so that the graphene oxide is reduced to form reduced graphene oxide., 'wherein forming the electrically conductive layer comprises6. The method according to claim 1 ,wherein providing the catalyst on the electrically conductive layer comprises dipping or immersing the substrate, the electrically conductive layer on the surface of the substrate, in a catalyst solution ...

POLYMERIC NANOCOMPOSITE FILMS WITH EMBEDDED CHANNELS AND METHODS FOR THEIR PREPARATION AND USE

Method of forming micro channels in a polymeric nanocomposite film is provided. The method includes combining one or more monomers to form a mixture and adding a plurality of carbon fibers with metal nanoparticles dispersed therein to the mixture prior to or concurrently with formation of a polymer from the monomers. The method also includes adding at least one hydrophobic agent and at least one plasticizer to the polymer to form the polymeric nanocomposite film and forming a plurality of laser-etched micro channels in a surface of the polymeric nanocomposite film. 1. A method of forming micro channels embedded in a polymeric nanocomposite film , the method comprising:combining one or more monomers to form a mixture;adding a plurality of carbon fibers with metal nanoparticles dispersed therein to the mixture prior to or concurrently with formation of a polymer from the monomers;adding at least one hydrophobic agent and at least one plasticizer to the polymer to form the polymeric nanocomposite film; andforming a plurality of laser-etched micro channels in a surface of the polymeric nanocomposite film.2. The method of claim 1 , wherein the one or more monomers comprises methyl acetate claim 1 , vinyl acetate claim 1 , methyl acrylate claim 1 , ethyl acrylate or combinations thereof.3. The method of claim 1 , wherein the polymer comprises polyvinyl alcohol (PVA) claim 1 , polyvinyl acetate (PVAc) claim 1 , polypropylene (PP) claim 1 , polyethylene (PE) claim 1 , polyvinylidene fluoride (PVDF) claim 1 , or combinations thereof.4. The method of claim 1 , wherein the micro channels have an average length of about 5 millimeter (mm) to about 30 mm.5. The method of claim 1 , wherein the micro channels have an average width of about 50 micrometer (μm) to about 300 μm.6. The method of claim 1 , wherein the micro channels have an average depth of about 40 micrometer (μm) to about 150 μm.7. The method of claim 1 , wherein the micro channels are formed in the polymeric ...

A metal-doped hydroxyapatite catalyst

The present invention provides the use of a metal-doped hydroxyapatite catalyst for highly selective conversion of an alcohol to an aldehyde at low temperatures. More specifically, the invention provides the use of a silver-doped hydroxyapatite catalyst for the highly selective oxidative dehydrogenation of ethanol to acetaldehyde. The present invention also provides the method for converting ethanol to acetaldehyde using a silver-doped hydroxyapatite catalyst.

EPOXIDATION PROCESSES AND CATALYSTS FOR USE THEREIN

Epoxidation methods and catalyst are described herein. The epoxidation catalysts generally include a metal component including silver and a support material including kaolinite, wherein the epoxidation catalyst includes less than 55 wt. % metal component. 2. The catalyst of claim 1 , wherein the phyllosilicate solid component is a clay mineral group phyllosilicate.3. The catalyst of claim 1 , wherein the catalyst further comprises a Group 1 metal salt.4. The catalyst of claim 3 , wherein the Group 1 metal salt is KNO.5. The catalyst of claim 1 , wherein the catalyst further comprises a promoter metal selected from: rhenium claim 1 , tungsten claim 1 , zinc claim 1 , nickel claim 1 , gold claim 1 , copper claim 1 , sodium claim 1 , potassium claim 1 , lithium claim 1 , rubidium claim 1 , cesium claim 1 , or molybdenum.6. The catalyst of claim 1 , wherein the catalyst comprises from about 10 wt. % to about 70 wt. % of silver.7. The catalyst of claim 3 , wherein the catalyst comprises from about 0.05 wt. % to about 10 wt. % of the Group 1 metal nitrate salt.8. The catalyst of claim 5 , wherein the catalyst comprises from about 0.0 wt. % to about 5.0 wt. % of the promoter metal.9. A method comprising:(a) obtaining a phyllosilicate solid component; and(b) depositing silver having an oxidation state of zero on the phyllosilicate solid component to form a silver catalyst.10. The method of further comprising calcinating the silver catalyst at a temperature from about 250° C. to about 800° C. to form a calcinated silver catalyst.11. The method of further comprising depositing a promoter metal onto the silver catalyst to form a promoter deposited silver catalyst.12. The method of further comprising depositing a Group 1 nitrate salt onto the silver catalyst to form a Group 1 nitrate deposited silver catalyst.13. The method of further comprising drying the calcinated silver catalyst at a temperature from about 100° C. to about 200° C. to form a dried calcinated silver catalyst. ...

MOISTURE AND HYDROGEN-ABSORBING GETTER AND METHOD FOR MANUFACTURING SAME

A moisture and hydrogen adsorption getter is provided. The moisture and hydrogen adsorption getter includes a silicon substrate including a concave portion and a convex portion, a silicon oxide layer conformally provided along a surface of the concave portion and a surface of the convex portion and configured to adsorb moisture, and a hydrogen adsorption pattern disposed on the silicon oxide layer. A portion of the silicon oxide layer is exposed between portions of the hydrogen adsorption pattern. 1. A moisture and hydrogen adsorption getter comprising:a silicon substrate including a concave portion and a convex portion;a silicon oxide layer conformally provided along a surface of the concave portion and a surface of the convex portion and configured to adsorb moisture; anda hydrogen adsorption pattern disposed on the silicon oxide layer,wherein a portion of the silicon oxide layer is exposed between portions of the hydrogen adsorption pattern.2. The moisture and hydrogen adsorption getter of claim 1 , wherein the silicon substrate further includes a plurality of holes extending downward from the surfaces of the concave portion and the convex portion.3. The moisture and hydrogen adsorption getter of claim 2 , wherein the silicon oxide layer is conformally provided along inner surfaces of the holes.4. The moisture and hydrogen adsorption getter of claim 2 , further comprising:a plurality of metal particles provided in the plurality of holes, respectively.5. The moisture and hydrogen adsorption getter of claim 4 , wherein the metal particles provided in the holes includes at least one of Pt claim 4 , Ag claim 4 , or Pd.6. The moisture and hydrogen adsorption getter of claim 1 , further comprising:passivation metal catalyst particles provided on the hydrogen adsorption pattern.7. The moisture and hydrogen adsorption getter of claim 6 , wherein the passivation metal catalyst particles include at least one of Ag claim 6 , Pd claim 6 , or Pt.8. The moisture and hydrogen ...

Self-Disinfecting Photocatalyst Sheet With Primer

A self-disinfecting photocatalyst sheet includes a substrate material and a photocatalyst layer with a primary photocatalyst and a secondary photocatalyst. The primary photocatalyst is a metal oxide photocatalyst, whereas the secondary photocatalyst is a metallic photocatalyst. The substrate material binds the photocatalyst layer by either connecting a metal ion of the primary photocatalyst and/or the secondary photocatalyst through two oxygen atoms of a carboxyl group (COO), or by forming hydrogen bonds between a carbonyl group and a surface hydroxyl group (OH) of the primary photocatalyst. The self-disinfecting photocatalyst sheet is activatable by a visible light and can self-disinfect against bacteria and viruses. 1. A self-disinfecting photocatalyst sheet , comprisinga substrate material with a first side and a second side opposite the first side; anda photocatalyst layer comprising a primary photocatalyst and a secondary photocatalyst, the primary photocatalyst comprises a metal oxide photocatalyst,', 'the secondary photocatalyst comprises a metallic photocatalyst,', 'a mass ratio of the primary photocatalyst to the secondary photocatalyst is between 10:1 to 100:1, and', connecting a metal ion of either or both of the primary photocatalyst and the secondary photocatalyst through two oxygen atoms of a carboxyl group (COO), or', {'sup': '−', 'forming hydrogen bonds between a carbonyl group and a surface hydroxyl group (OH) of the primary photocatalyst.'}], 'the substrate material binds the photocatalyst layer by either], 'wherein2. The self-disinfecting photocatalyst sheet of claim 1 , further comprising an adhesive layer which is coated on the second side of the substrate material.3. The self-disinfecting photocatalyst sheet of claim 1 , wherein the primary photocatalyst further comprises anatase titanium dioxide (TiO).4. The self-disinfecting photocatalyst sheet of claim 3 , wherein the primary photocatalyst further comprises rhombus-shape anatase titanium ...

Self-Disinfecting Multi-Band Photocatalyst Sheet

A self-disinfecting photocatalyst sheet includes a substrate material and a photocatalyst layer with a primary photocatalyst and a secondary photocatalyst. The primary photocatalyst is a metal oxide photocatalyst, whereas the secondary photocatalyst is a metallic photocatalyst. The primary photocatalyst forms a covalent bond with the substrate material. The self-disinfecting photocatalyst sheet is photocatalytic active to different bands of wavelength. Another self-disinfecting photocatalyst sheet includes a substrate material, a prime material layer and a photocatalyst layer with a primary photocatalyst and a secondary photocatalyst. The prime material layer is between the substrate and the photocatalyst layer. The primary photocatalyst forms a covalent bond with the prime material. 1. A self-disinfecting photocatalyst sheet , comprisinga substrate material with a first side and a second side opposite the first side; anda photocatalyst layer comprising a primary photocatalyst and a secondary photocatalyst, the primary photocatalyst comprises a metal oxide photocatalyst,', 'the secondary photocatalyst comprises a metallic photocatalyst,', 'a mass ratio of the primary photocatalyst to the secondary photocatalyst is greater than 2:1,', 'the primary photocatalyst forms a covalent bond with the substrate material at a molecular level on the first side of the substrate material,', 'the photocatalyst layer is photocatalytic active to every wavelength band of a plurality of wavelength bands comprising 190˜280 nm, 280˜315 nm, 315 400 nm, and 400˜700 nm,', 'the photocatalyst layer is more photocatalytic active to the wavelength band 190˜280 nm than to the wavelength band 280˜315 nm,', 'the photocatalyst layer is more photocatalytic active to the wavelength band 280˜315 nm than to the wavelength band 315˜400 nm, and', 'the photocatalyst layer is more photocatalytic active to the wavelength band 315˜400 nm than to the wavelength band 400˜700 nm., 'wherein2. The self- ...

METHOD FOR PRODUCING POROUS BODIES WITH ENHANCED PROPERTIES

A precursor mixture for producing a porous body, wherein the precursor mixture comprises: (i) milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) boehmite powder that functions as a binder of the alpha alumina powders, and (iii) burnout materials having a particle sizes of 1-10 microns. In some embodiments, an unmilled alpha alumina powder having a particle size of 10 to 100 microns is also included in said precursor mixture. Also described herein is a method for producing a porous body in which the above-described precursor mixture is formed to a given shape, and subjected to a heat treatment step in which the formed shape is sintered to produce the porous body. 1. A method for producing a porous body , the method comprising:providing a precursor mixture comprising (i) milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) boehmite powder that functions as a binder of the alpha alumina powders, and (iii) burnout material having a particle size of 1-10 microns;forming a predetermined shape; andsubjecting the shape to a heat treatment step in which the shape is sintered to produce the porous body.2. The method of claim 1 , further comprising unmilled alpha alumina powder having a particle size of 10 to 100 microns in said precursor mixture.3. The method of claim 2 , wherein the weight ratio of milled to unmilled alpha alumina powder is in a range of 0.25:1 to about 5:1.4. The method of claim 1 , wherein unmilled alpha alumina powder is excluded from the precursor mixture.5. The method of claim 1 , wherein the method comprises:(i) dispersing boehmite into water to produce a dispersion of boehmite;(ii) adding a milled alpha alumina powder having a particle size of 0.1 to 6 microns to the dispersion of boehmite, and mixing until a first homogeneous mixture is obtained, wherein said boehmite functions as a binder of the alpha alumina powder;(iii) adding burnout materials having a particle size of 1-10 microns, and mixing ...

SPECIAL PALLADIUM CATALYST FOR SEWAGE TREATMENT AND USE THEREOF

A special palladium catalyst for sewage treatment includes a stainless steel carrier, and a metal palladium layer uniformly distributed on the surface of the stainless steel carrier. A thickness of the palladium layer is 1 nm-5 μm. A preparation method and use of the special palladium catalyst for sewage treatment includes contacting sewage with a palladium catalyst described above. 1. A catalyst for wastewater treatment , comprising: a stainless steel carrier and a catalyst metal layer , wherein the catalyst metal layer comprises palladium evenly distributed on a surface of the stainless steel carrier.2. The catalyst for wastewater treatment according to claim 1 , wherein a thickness of the catalyst metal layer is 1 nm-5 μm.3. The catalyst for wastewater treatment according to claim 1 , wherein the catalyst metal layer further comprises silver.4. The catalyst for wastewater treatment according to claim 3 , wherein a weight of silver is 0.001%-45% of a weight of palladium.5. The catalyst for wastewater treatment according to claim 1 , wherein the catalyst metal layer is evenly adhered on the stainless steel carrier by chemical precipitation.6. A method for treating wastewater using the catalyst according to claim 1 , comprising: contacting the wastewater with the catalyst.7. The method according to claim 6 , wherein the wastewater is printing and dyeing wastewater claim 6 , paper mill wastewater claim 6 , slaughter house wastewater claim 6 , tannery wastewater claim 6 , chemical textile wastewater claim 6 , food processing wastewater claim 6 , petrochemical wastewater claim 6 , polyvinyl alcohol-containing wastewater claim 6 , colored metallurgy wastewater claim 6 , coking wastewater claim 6 , coal chemical wastewater claim 6 , electroplating and surface treatment wastewater claim 6 , oximation reaction wastewater claim 6 , MBR wastewater claim 6 , wastewater after biodegradation claim 6 , sludge-containing wastewater after biodegradation claim 6 , foul smelling ...

BIMETALLIC CATALYST

An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed. 1. An oxidation catalyst composition for controlling emissions , which composition comprises a support and a bimetallic catalyst consisting of gold and a second metal selected from the group consisting of platinum , rhodium , ruthenium , copper and nickel , and wherein the bimetallic catalyst is supported on the support.2. An oxidation catalyst composition according to wherein the atomic ratio of the second metal to gold is from 100:1 to 1:100.3. An oxidation catalyst composition according to wherein the atomic ratio of the second metal to gold is from 95:5 to 5:95.4. An oxidation catalyst composition according to wherein the atomic ratio of the second metal to gold is from 95:5 to 25:75.5. An oxidation catalyst composition according to wherein the oxidation catalyst composition comprises a total amount (in weight %) of the second metal and gold of from 0.1 to 10%6. An oxidation catalyst composition according to wherein the second metal is platinum7. An oxidation catalyst composition according to wherein the support is a metal oxide support comprising a non-reducible metal oxide claim 1 , a reducible metal oxide or a mixture thereof.8. An oxidation catalyst composition according to wherein the support comprises a non-reducible metal oxide selected from the group consisting of alumina claim 7 , silica-alumina claim 7 , zirconia claim 7 , a zeolite and a mixture claim 7 , composite oxide or mixed oxide of any two or more thereof.9. An oxidation ...

ANTIMICROBIAL AIR DUCTS

A refrigerator includes a cabinet coupled to one or more doors forming a storage compartment and an air purifying duct system positioned in the storage compartment. The air purifying duct system includes an air duct in fluid communication with the storage compartment; a fan configured to circulate air between the storage compartment and air duct; a photocatalyst disposed on a portion of the interior surface; one or more LEDs positioned to project light across the air duct and onto the photocatalyst; and an air circulation path configured to direct pathogens within the storage compartment into the air duct using the fan and circulate purified air into the storage compartment. 1. A refrigerator comprising:a cabinet coupled to one or more doors forming a storage compartment; and an air duct in fluid communication with the storage compartment;', 'a fan configured to circulate air between the storage compartment and air duct;', 'a photocatalyst disposed on a portion of the interior surface;', 'one or more LEDs positioned to project light across the air duct and onto the photocatalyst; and', 'an air circulation path configured to direct pathogens within the storage compartment into the air duct using the fan., 'an air purifying duct system positioned in the storage compartment, wherein the air purifying duct system comprises2. The refrigerator according to claim 1 , wherein the plurality of LEDs project visible light claim 1 , UV-A light claim 1 , UV-B light claim 1 , UV-C light claim 1 , or a combination thereof onto the photocatalyst.3. The refrigerator according to claim 1 , wherein the photocatalyst is a coating containing a mixture of titanium dioxide nanoparticles (TiO) and silver nanoparticles (Ag).4. The refrigerator according to claim 1 , wherein the photocatalyst is a coating containing a mixture of zirconium dioxide nanoparticles (ZrO) and gallium nanoparticles (Ga).5. The refrigerator according to claim 1 , wherein the photocatalyst comprises a mixture of ...

MULTI-STEP PROCESS AND SYSTEM FOR CONVERTING CARBON DIOXIDE TO MULTI-CARBON PRODUCTS

Systems and methods for the electrochemical conversion of COT to multi-carbon products are provided. Each system and method comprises a sequence of multiple, independently optimized electrochemical reaction steps that take place in separate reaction chambers. 1. A method of electrochemical conversion of COto a multi-carbon compound comprising:{'sub': '2', 'in a first reaction module, reacting COwith water under first electrochemical reaction conditions sufficient to produce CO and hydroxide ions;'}transferring the CO to a second reaction module;in the second reaction module, reacting the CO with water under second electrochemical reaction conditions sufficient to produce the multi-carbon compound; andcollecting the multi-carbon compound.2. The method of claim 1 , wherein the first electrochemical reaction conditions differ from the second electrochemical reaction conditions.3. The method of claim 1 , wherein the first electrochemical reaction conditions include the use of a first catalyst and the second electrochemical reaction conditions include the use of a second catalyst.4. The method of claim 3 , wherein the first catalyst and the second catalyst are different.5. The method of claim 1 , wherein the multi-carbon compound is a multi-carbon alcohol claim 1 , a multi-carbon hydrocarbon claim 1 , a multi-carbon aldehyde or a multi-carbon carboxylic acid.6. The method of claim 5 , wherein the multi-carbon alcohol is ethanol claim 5 , propanol claim 5 , or butanol.7. The method of claim 5 , wherein the multi-carbon hydrocarbon is ethylene.8. The method of claim 5 , wherein the multi-carbon aldehyde is acetaldehyde or propionaldehyde.9. The method of claim 5 , wherein the multi-carbon carboxylic acid is acetic acid or gamma-hydroxybutyric acid.10. The method of claim 6 , wherein the multi-carbon alcohol is ethanol; the first electrochemical reaction conditions include contacting the COand water with an Ag-based catalyst or an Au-based catalyst claim 6 , and the second ...

SILVER NANOWIRES, METHODS OF MAKING SILVER NANOWIRES, CORE-SHELL NANOSTRUCTURES, METHODS OF MAKING CORE-SHELL NANOSTRUCTURES, CORE-FRAME NANOSTRUCTURES, METHODS OF MAKING CORE-FRAME NANOSTRUCTURES

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure provide for silver nanowires, methods of making silver nanowires, core-shell nanostructures, methods of making core-shell nanostructures, core-frame nanostructures, methods of making core-frame nanostructures, and the like. 1. A structure , comprising:a silver nanowire having a diameter of about 5 to 25 nm and an aspect ratio of about 500 to 5000.2. The structure of claim 1 , wherein the silver nanowire has a penta-twinned structure.3. The structure of claim 1 , wherein the silver nanowire has a transverse localized surface plasmon resonance peak below 400 nm.4. A method of making silver nanowires claim 1 , comprising:mixing a bromide ion solution with a solution including poly(vinyl pyrrolidone) and ethylene glycol to form a first mixture;mixing a silver precursor solution with the first mixture to form a second mixture; andheating the second mixture to about 150 to 170° C. to form the silver nanowires, wherein the silver nanowires have a diameter of about 5 to 25 nm and an aspect ratio of about 500 to 5000.5. The method of claim 4 , wherein the poly(vinyl pyrrolidone) has a molecular weight of about 1×10g/mol to 1.5×10g/mol.6. The method of claim 4 , wherein the bromide ion solution selected from the group consisting of: a LiBr solution claim 4 , NaBr solution claim 4 , KBr solution claim 4 , RbBr solution claim 4 , and CsBr solution.7. A structure comprising:a core-shell nanostructure, wherein the core is a silver nanostructure, and wherein the shell is M that is selected from the group consisting of Au, Pd, Pt, a silver alloy, and a bimetallic or multi-metallic combination of these metals.8. The structure of claim 7 , wherein the silver nanostructure is selected from the group consisting of: a nanorod claim 7 , a nanowire claim 7 , a nano-sized polyhedron claim 7 , and a nano-sized prism or thin plate.9. The structure of ...

PROCESS FOR PREPARING AN EPOXIDATION CATALYST

A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e). 1. A process for preparing a silver-containing catalyst for the epoxidation of olefins comprising the steps of:(a) providing a porous multimodal support having at least two modes of pore size distributions;(b) providing a first silver-containing impregnation solution for impregnating the first silver-containing impregnation solution into the pores of the porous multimodal support;(c) impregnating the porous multimodal support with the first silver-containing impregnation solution from step (b) to provide the porous multimodal support with a first amount of first silver-containing impregnation solution;(d) centrifuging the impregnated first silver-containing impregnation solution from the porous multimodal support to provide the porous multimodal support with a second amount of first silver-containing impregnation solution remaining in the support pores;(e) roasting the impregnated porous multimodal support from step (d);(f) ...

SUBNANOMETER TO NANOMETER TRANSITION METAL CO OXIDATION CATALYSTS

The present invention provides a catalyst defined in part by a conductive substrate; a film overlaying a surface of the substrate; and a plurality of metal clusters supported by the layer, wherein each cluster comprises between 8 and 11 atoms. Further provided is a catalyst defined in part by a conductive substrate; a layer overlaying a surface of the substrate; and a plurality of metal clusters supported by the layer, wherein each cluster comprises at least two metals. 1. A catalyst comprising:a support substrate;a film overlaying a surface of the substrate; anda plurality of metal clusters supported by the film, wherein each cluster comprises between 8 and 12 atoms.2. The catalyst of claim 1 , wherein the substrate is silicon claim 1 , the film is alumina and the metal is platinum.3. The catalyst of claim 1 , wherein the film has a surface roughness of approximately 0.3 nm Rand higher.4. The catalyst of claim 1 , wherein the film is between approximately 0.3 nm and approximately 5 nm thick.5. The catalyst of claim 1 , wherein the film is selected from the group consisting of amorphous alumina claim 1 , ordered alumina crystal claim 1 , and combinations thereof.6. The catalyst of claim 1 , wherein some of the atoms reside in different planes from each other.7. The catalyst of claim 1 , wherein the plurality is deposited on a three dimensional scaffold defined by the film.8. The catalyst of claim 1 , wherein the plurality is deposited on a scaffold and the scaffold is a structure selected from the group consisting of nanotubes claim 1 , nanorods claim 1 , crystal matrices claim 1 , surfaces of amorphous films claim 1 , and combinations thereof.9. The catalyst of wherein each cluster comprises at least two metals.10. The catalyst of claim 1 , wherein each cluster comprises platinum and silver.11. The catalyst of claim 10 , wherein each cluster comprises from two to three atoms of platinum and nine atoms of silver.12. The catalyst of claim 11 , wherein each cluster of ...

A COMPOSITE MATERIAL AND A METHOD TO PREPARE THE COMPOSITE

The invention relates to a composite material, suitable for treating water. The composite material comprises an active layer and a substrate layer, with the active layer including titanium dioxide and silver nanoparticles. The active layer is bonded to the substrate layer such that, in use, there is substantially no leaching of the active layer into the body of water. The invention further relates to a method of preparing the composite material.

PHOTOCATALYST, MANUFACTURING METHOD THEREFOR, AND PHOTOCATALYST APPARATUS

Provided is a photocatalyst including: a porous metal oxide film; and metal particles formed on a surface of the porous metal oxide film. 1. A photocatalyst comprising:a porous metal oxide film; andmetal particles formed on a surface of the porous metal oxide film.2. The photocatalyst according to claim 1 , wherein the photocatalyst is activated by visible light of a wavelength from 380 nm to 700 nm.3. The photocatalyst according to claim 1 , wherein the metal particles form a discontinuous coating layer having island shapes on the surface of the porous metal oxide film.4. The photocatalyst according to claim 3 , wherein the island shapes have an average diameter from 1 nm to 10 nm.5. The photocatalyst according to claim 3 , wherein the discontinuous coating layer has a thickness from 0.1 nm to 10 nm.6. The photocatalyst according to claim 1 , wherein the metal oxide in the metal oxide film comprises at least one selected from among titanium oxide claim 1 , tungsten oxide claim 1 , zinc oxide claim 1 , niobium oxide claim 1 , and combinations thereof.7. The photocatalyst according to claim 1 , wherein the metal particles comprise at least one selected from among tungsten claim 1 , chromium claim 1 , vanadium claim 1 , molybdenum claim 1 , copper claim 1 , iron claim 1 , cobalt claim 1 , manganese claim 1 , nickel claim 1 , platinum claim 1 , gold claim 1 , silver claim 1 , cerium claim 1 , cadmium claim 1 , zinc claim 1 , magnesium claim 1 , calcium claim 1 , strontium claim 1 , barium claim 1 , and combinations thereof.8. The photocatalyst according to claim 1 , wherein the porous metal oxide film has a porosity from 5% to 50%.9. The photocatalyst according to claim 1 , wherein the porous metal oxide film has a specific surface area from 50 m/g to 500 m/g.10. The photocatalyst according to claim 1 , wherein the metal particles are present in an amount of 0.0001 mg to 0.01 mg per 1 cmof the porous metal oxide film.11. The photocatalyst according to claim 1 , wherein ...

PLASMONIC DIAMOND FILMS AND RELATED METHODS

Plasmonic diamond films are provided. In an embodiment, a plasmonic diamond film comprises a plurality of plasmonic nanoparticles encapsulated by diamond and distributed on an underlying surface of diamond. Methods of forming the plasmonic diamond films are also provided. 1. A plasmonic diamond film comprising a layer of diamond-encapsulated plasmonic nanoparticles on an underlying surface of diamond , wherein either the diamond-encapsulated plasmonic nanoparticles comprise a metal selected from a group consisting of Ag , Au , Cu , Al , and combinations thereof; or the diamond-encapsulated plasmonic nanoparticles are core-shell plasmonic nanoparticles distributed across the underlying surface of diamond , each core-shell plasmonic nanoparticle comprising a metal core and a diamond shell thereover.2. The plasmonic diamond film of claim 1 , wherein the diamond-encapsulated plasmonic nanoparticles comprise the metal selected from a group consisting of Ag claim 1 , Au claim 1 , Cu claim 1 , Al claim 1 , and combinations thereof.3. The plasmonic diamond film of claim 2 , further comprising a diamond matrix composed of the underlying surface of diamond as a first layer of diamond and a second layer of diamond in contact with the first layer of diamond at an interface claim 2 , wherein the layer of the plasmonic nanoparticles is positioned at the interface of the first and second layers of diamond.4. The plasmonic diamond film of claim 3 , wherein the second layer of diamond has an average thickness that is the same as claim 3 , or greater than claim 3 , an average thickness of the first layer of diamond.5. The plasmonic diamond film of claim 3 , wherein the first layer of diamond has a crystallinity that is different from that of the second layer of diamond.6. The plasmonic diamond film of claim 2 , wherein the diamond-encapsulated plasmonic nanoparticles have an average diameter of less than 100 nm.7. The plasmonic diamond film of claim 2 , wherein the diamond- ...

PHOTOCATALYTIC FLUID PURIFICATION SYSTEMS

The Invention describes LED illuminated photocatalytic fluid purification systems, especially for use for ethylene mitigation and control in agricultural, horticultural and floricultural growth, storage and transport modules. Aspects of the invention include systems integration with grow lights, ethylene and plant stress sensors, and communication with external control and data sources. 1. A plant logistics module , comprising an integrated photocatalytic ethylene mitigation system , wherein light emitting diodes (LEDs) provide the photocatalytic illumination to drive the photocatalytic ethylene mitigation system.2. The module of claim 1 , wherein the photocatalytic ethylene mitigation system comprises a monolithic composite photocatalyst claim 1 , the monolithic composite photocatalyst comprising titanium oxide.3. The module of claim 2 , wherein the monolithic composite catalyst is modified to achieve optical absorbance greater than 10% at approximately a 405 nm wavelength for a material thickness of 8 mm.4. The module of claim 2 , wherein the monolithic composite photocatalyst is modified by addition of Ag.5. The module of claim 1 , wherein the photocatalytic system further comprises a control system claim 1 , the control system utilizing data input from a sensor in the plant logistics module.6. The module of claim 5 , wherein the sensor is an ethylene sensor.7. The module of claim 6 , wherein the ethylene sensor is an infrared absorbance cell claim 6 , a mass spectrometer claim 6 , a surface enhanced plasmon scattering detector or a quartz crystal monitor.8. The module of claim 5 , wherein the sensor measures humidity claim 5 , temperature or other plant or environmental parameters.9. The module of claim 1 , wherein the photocatalytic ethylene mitigation system is integrated with a horticultural grow light illumination system.10. The module of claim 9 , wherein the horticultural grow light illumination system utilizes LEDs.11. The module of claim 9 , wherein the ...

Polyoxometalates Comprising Noble Metals And Corresponding Metal Clusters

The invention relates to polyoxometalates represented by the formula (A){M′[M″MXORH]} or solvates thereof, corresponding supported polyoxometalates, and processes for their preparation, as well as corresponding metal-clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate. 118.-. (canceled)19. A composition comprising a polyoxometalate represented by the formula:{'br': None, 'sub': n', 's', '12', '8', 'y', 'z', 'q, 'sup': m+', 'm−, '(A){M′[M″MXORH]}'} each A independently represents a cation,', 'n is the number of cations,', {'sup': '8', 'all M are the same, and are selected from the group consisting of Pd, Pt, Rh, Ir, Ag, and Au, and each M has dvalence electron configuration,'}, 'each M′ is independently selected from the group consisting of Rh, Ir, Pd, Pt, Ag, Au, Cd, Hg and mixtures thereof,', 's is a number from 1 to 8,', 'M″ is selected from the group consisting of Li, Na, K, Mg, Ca, Sr, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Ru, Rh, Pd, Ag, Cd, Lu, Hf, Re, Os, Ir, Pt, Au, Hg and lanthanide metal,', 'each X is independently selected from the group consisting of Al, Ga, Si, Ge, P, As, Sb, Bi, S, Se, Te and mixtures thereof,', 'each R is a substituent group which is covalently bonded to X, and each R is independently selected from the group consisting of a hydrogen atom, a substituent group bonded to X via a carbon atom of said substituent group, a substituent group bonded to X via an oxygen atom of said substituent group, a substituent group bonded to X via a sulphur atom of said sub stituent group, and a substituent group bonded to X via a nitrogen atom of said substituent group,', 'y is a number from 32 to 40,', 'z is a number from 0 to 8,', 'q is a number from 0 to 16, and', {'sub': s', '12', '8', 'y', 'z', 'q, 'm is a number representing the total positive charge m+of n cations A and the ...

CATALYST COMPRISING PALLADIUM AND SILVER, AND ITS APPLICATION FOR SELECTIVE HYDROGENATION

Disclosed are a catalyst, its preparation and use in selective hydrogenation, which catalyst has a porous support grain on which are deposited palladium and silver, and at least one alkali and/or alkaline earth metal; the porous support contains a refractory silica, alumina and/or silica-alumina oxide, where at least 80 wt. % of the palladium is distributed in a crust at the periphery of the support, and at least 80 wt. % of the silver is distributed in a crust at the periphery of the support, the local content of palladium at each point along the diameter of the grain follows the same course as the local content of silver. 1. A process for preparing a catalyst comprising a porous support grain on which are deposited palladium and silver , and at least one metal selected from the group consisting of the alkalis and the alkaline earths , the porous support comprising at least one refractory oxide selected from the group consisting of silica , alumina and silica-alumina , the specific surface area of the porous support being within the range 10 to 150 m/g , the palladium content of the catalyst within the range 0.05 to 0.6 wt. % , the silver content of the catalyst within the range 0.02 to 3 wt. % , at least 80 wt. % of the palladium being distributed in a crust at the periphery of the support , the thickness of the said crust being within the range 10 to 160 μm , at least 80 wt. % of the silver being distributed in a crust at the periphery of the support , the thickness of the said crust being within the range 10 to 160 μm , the local content of palladium at each point along the diameter of the grain following the same course as the local content of silver , the sum of the contents of alkali and/or alkaline earth metals being within the range 0.02 to 5 wt. % a step 1a) wherein, in an apparatus, a colloidal suspension of palladium oxide or palladium hydroxide is prepared in an aqueous phase by mixing an aqueous solution 1 comprising at least one hydroxide selected ...

Selective Hydrogenation Catalyst and Methods of Making and Using Same

A composition comprising a support formed from a high surface area alumina and having a low angularity particle shape; and at least one catalytically active metal, wherein the support has pores, a total pore volume, and a pore size distribution; wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum; wherein a first peak has a first maximum of pore diameters of equal to or greater than about 200 nm and a second peak has a second maximum of pore diameters of less than about 200 nm; and wherein greater than or equal to about 5% of a total pore volume of the support is contained within the first peak of pore diameters. 1. A composition comprising:a support formed from a high surface area alumina and having a low angularity particle shape, wherein the low angularity particle shape is a sphere, an ovoid, or a capsule; andat least one catalytically active metal,wherein the support has pores, a total pore volume, and a pore size distribution; wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum; wherein a first peak has a first maximum of pore diameters of from greater than 1,000 nm to about 6,000 nm and a second peak has a second maximum of pore diameters of less than about 200 nm; and wherein greater than or equal to about 15% of a total pore volume of the support is contained within the first peak of pore diameters.2. The composition of wherein the high surface area alumina comprises activated alumina claim 1 , gamma alumina claim 1 , rho alumina claim 1 , boehmite claim 1 , psuedoboehmite claim 1 , bayerite or combinations thereof.3. The composition of wherein the high surface area alumina consists essentially of activated alumina and/or gamma alumina.4. The composition of having a surface area of from about 1 m/g to about 35 m/g.5. The composition of having a total pore volume of from about 0.1 cc/g to about 0.9 cc/g as determined by differential mercury ...

PREPARING METHOD OF LINEAR CARBONATE COMPOUNDS

Provided is a preparing method of linear carbonate compounds, including performing a coupling reaction of carbon dioxide in the presence of a titanium dioxide complex. The titanium dioxide complex includes an anatase phase and a rutile phase, a reduced titanium dioxide which is formed by selectively reducing any one of the anatase phase and the rutile phase, and a metallic oxide bound to the reduced titanium dioxide. 1. A preparing method of linear carbonate compounds , comprising:performing a coupling reaction of carbon dioxide in the presence of a titanium dioxide complex,wherein the titanium dioxide complex has an anatase phase and a rutile phase, a reduced titanium dioxide which is formed by selectively reducing any one of the anatase phase and the rutile phase, and a metallic oxide bound to the reduced titanium dioxide.2. The preparing method of linear carbonate compounds according to claim 1 , wherein the titanium dioxide complex serves as a photocatalyst so that carbon dioxide is reduced to carbon monoxide.3. The preparing method of linear carbonate compounds according to claim 1 , wherein the coupling reaction of carbon dioxide includes a reaction between carbon dioxide and alcohol.4. The preparing method of linear carbonate compounds according to claim 3 , wherein the alcohol includes a member selected from the group consisting of methanol claim 3 , ethanol claim 3 , propanol claim 3 , butanol claim 3 , iso-propylol and combinations thereof.5. The preparing method of linear carbonate compounds according to claim 1 , wherein the linear carbonate compounds include a member selected from the group consisting of dimethyl carbonate claim 1 , diethyl carbonate claim 1 , methyl ethyl carbonate claim 1 , dipropyl carbonate claim 1 , methyl propyl carbonate claim 1 , ethyl propyl carbonate claim 1 , dibutyl carbonate and combinations thereof.6. The preparing method of linear carbonate compounds according to claim 1 , wherein the titanium dioxide complex is doped ...

Composite Filaments having Thin Claddings, Arrays of Composite Filaments, Fabrication and Applications Thereof

A method of fabricating composite filaments is provided. An initial composite filament including a core and a cladding (such as a Pt-group metal) is cut into smaller pieces (or is first mechanically reduced and then cut into smaller pieces). The smaller pieces of the filaments are inserted into a metal matrix, and the entire structure is then further reduced mechanically in a series of reduction steps. The process can be repeated until the desired cross sectional dimension of the filaments is achieved. The matrix can then be chemically removed to isolate the final composite filaments with the cladding thickness down to the nanometer range. The process allows the organization and integration of filaments of different sizes, compositions, and functionalities into arrays suitable for various applications. Materials and components made from such composite filaments and arrays of composite filaments are also disclosed, 1. A method of fabricating micro-sized composite filaments from an initial composite filament having a first cross sectional dimension , the initial composite filament including a core made from a first material and a cladding made from a second material and enclosing the core , comprising:(a) mechanically reducing the initial composite filament to produce an intermediate composite filament having a reduced cross sectional dimension;(b) cutting the intermediate composite filament into two or more shorter filaments;(c) inserting the two or more shorter composite filaments side by side into a first matrix made from a third material;(d) mechanically reducing the first matrix with the two or more shorter filaments to further reduce the cross sectional dimensions of the two or more shorter filaments; and(e) isolating the two or more shorter filaments having further reduced cross sectional dimensions obtained from (d) from the first matrix.2. The method of claim 1 , wherein obtaining the initial composite filament comprises inserting the core into a tube of the ...

CATALYST FOR 1,3-BUTADIENE PRODUCTION FROM ETHANOL

The present invention relates to a catalyst for the conversion of ethanol to 1,3-butadiene comprising a support, characterized in that silver (Ag) and copper (Cu) are present on the support in metal form, to a process for producing such a catalyst, to the use of such a catalyst for the conversion of ethanol to 1,3-butadiene, and to a process for the catalytic conversion of ethanol to 1,3-butadiene using such a catalyst. 1. A catalyst for the conversion of ethanol to 1 ,3-butadiene comprising:a support, characterized in that silver (Ag) and copper (Cu) are present on the support in metal form,the support comprising a first metal oxide, the first metal oxide of the support being silica anda second metal oxide, which is different from the first metal oxide, the second metal oxide being magnesium oxide.2. The catalyst according to claim 1 , wherein the silica of the support is silica fume.3. The catalyst according to claim 1 , wherein the magnesium oxide is nano-sized magnesium oxide.4. The catalyst according to claim 1 , wherein the weight ratio between the first metal oxide and the second metal oxide in the support is in the range of 100:1 to 1:100.5. The catalyst according to claim 1 , wherein the weight ratio between silver (Ag) and copper (Cu) on the support is in the range of 10:1 and 1:10.6. The catalyst according to claim 1 , wherein the particle size of the catalyst is between 1 and 100 μm claim 1 , measured by electron microscopy (SEM) according to ASTM standard E986:04.7. The catalyst according to claim 1 , wherein the combined weight (metal loading) of Ag and Cu present on the support is in the range of 1% and 30% claim 1 , based on the total weight of the catalyst claim 1 , measured by X-ray fluorescence (XRF) techniques according to ASTM standard D4326:04.8. The catalyst of claim 1 , wherein the surface area of the catalyst is in the range of 60 to 400 m/g claim 1 , measured by Brunauer-Emmett-Teller method (BET) according to ASTM standard D6556:10.9. The ...

Composite Filaments having Thin Claddings, Arrays of Composite Filaments, Fabrication and Applications Thereof

A method of fabricating composite filaments is provided. An initial composite filament including a core and a cladding (such as a Pt-group metal) is cut into smaller pieces (or is first mechanically reduced and then cut into smaller pieces). The smaller pieces of the filaments are inserted into a metal matrix, and the entire structure is then further reduced mechanically in a series of reduction steps. The process can be repeated until the desired cross sectional dimension of the filaments is achieved. The matrix can then be chemically removed to isolate the final composite filaments with the cladding thickness down to the nanometer range. The process allows the organization and integration of filaments of different sizes, compositions, and functionalities into arrays suitable for various applications. Materials and components made from such composite filaments and arrays of composite filaments are also disclosed, 1. A method of fabricating micro-sized composite filaments from an initial composite filament having a first cross sectional dimension , the initial composite filament including a core made from a first material and a cladding made from a second material and enclosing the core , comprising:(a) mechanically reducing the initial composite filament to produce an intermediate composite filament having a reduced cross sectional dimension;(b) cutting the intermediate composite filament into two or more shorter filaments;(c) inserting the two or more shorter composite filaments side by side into a first matrix made from a third material;(d) mechanically reducing the first matrix with the two or more shorter filaments to further reduce the cross sectional dimensions of the two or more shorter filaments; and(e) isolating the two or more shorter filaments having further reduced cross sectional dimensions obtained from (d) from the first matrix.2. The method of claim 1 , wherein obtaining the initial composite filament comprises inserting the core into a tube of the ...

DIESEL PARTICULATE FILTER AND EXHAUST GAS PURIFICATION DEVICE

Provided is a novel DPF which can prevent PM from accumulating on the surface and interior of a filter substrate, and can suppress an increase in back pressure caused by exhaust gas. The DPF has a configuration in which an inorganic porous layer, which includes a metal oxide or a metal composite oxide and provided with surface irregularities having a thickness of at least 50% of the thickness of the inorganic porous layer, is formed on part or all of the surface of the dividing wall on the side where exhaust gas flows in. 1. A diesel particulate filter in which an exhaust gas circulates into a dividing wall of a filter substrate ,wherein the diesel particulate filter is configured to have an inorganic porous layer that contains a metal oxide or a metal composite oxide and is provided with a concavo-convex surface portion having a thickness of 50% or more of a thickness of the inorganic porous layer, the inorganic porous layer being formed on a partial or entire surface of the dividing wall which is located at an inflow side of the exhaust gas.2. A diesel particulate filter comprising a filter substrate with a structure in which gas inflow cells that are formed to open an upstream side of an exhaust gas and to block a downstream side of the exhaust gas , and gas outflow cells that are formed to block the upstream side of the exhaust gas and to open the downstream side of the exhaust gas are provided to be adjacent to each other via a dividing wall of the substrate ,wherein the diesel particulate filter is configured to have an inorganic porous layer that contains a metal oxide or a metal composite oxide and is provided with a concavo-convex surface portion having a thickness of 50% or more of a thickness of the inorganic porous layer, the inorganic porous layer being formed on a partial or entire surface of a dividing wall of the gas inflow cell.3. The diesel particulate filter according to claim 1 , wherein the surface of the inorganic porous layer comprises a ...

ALUMINA CARRIER, METHOD OF PREPARING THE SAME, AND SILVER CATALYST

The present disclosure discloses an α-alumina carrier, comprising the elements of lanthanum and silicon both dispersed in the interior and on the surface of the carrier. The mass ratio of the element of lanthanum to the element of silicon is in the range from 0.1:1 to 20:1. The inventors of the present disclosure have made extensive researches into the field of the silver catalyst and alumina carrier thereof, and added the elements of lanthanum and silicon (i.e., bulk phase addition) in preparing the alumina carrier used in the silver catalyst. The carrier thus obtained contains the elements of silicon and lanthanum both in the interior and on the surface thereof, and has improved specific surface area and strength. The silver catalyst prepared with the carrier can react in a low reaction temperature (has a high reaction activity) and has a high selectivity in producing ethylene oxide through oxidation of ethylene. 1. An α-alumina carrier , comprising elements of lanthanum and silicon both dispersed in an interior and on a surface of the carrier.2. The α-alumina carrier of claim 1 , wherein a mass ratio of the element of lanthanum to the element of silicon is in the range from 0.1:1 to 20:1.3. The α-alumina carrier of claim 1 , wherein the total content of the elements of silicon and lanthanum accounts for 0.01 wt % to 3.0 wt % of the carrier.4. The α-alumina carrier of claim 1 , wherein the α-alumina carrier has one or more of the following characteristics:{'sup': 2', '2, '1) a specific surface area in the range from 0.7 m/g to 2.0 m/g,'}2) a pore volume in the range from 0.35 ml/g to 0.85 ml/g,3) water absorption equal to or higher than 30%,4) side crushing strength in the range from 60 N/particle to 200 N/particle, and{'sub': 2', '3, '5) a content of α-AlOhigher than 70 wt % based on the total weight of the carrier.'}5. A method of preparing the α-alumina carrier of claim 1 , comprising the steps of:I) preparing a mixture comprising components of: a) trihydrate ...

TEMPLATED CATALYST COMPOSITION AND ASSOCIATED METHOD

A composition includes a templated metal oxide substrate having a plurality of pores and a catalyst material includes silver. The composition under Hat 30 degrees Celsius, the composition at a wavelength that is in a range of from about 350 nm to about 500 nm has a VIS-UV absorbance intensity that is at least 20 percent less than a standard silver alumina catalyst (Ag STD). The standard alumina is Norton alumina, and which has the same amount of silver by weight. 1. A method , comprising: reacting a metal alkoxide with a silver composition and a templating agent to form a reaction product; hydrolyzing the reaction product to form a hydrolyzed reaction product; condensing the hydrolysed reaction product to form a templated substrate; and controlling the reacting , hydrolyzing and condensing step to control the silver loading of the templated substrate , and the silver loaded templated substrate having a VIS-UV absorbance intensity that is at least 20 percent less than a standard silver alumina catalyst , and which has the same amount of silver by weight at a wavelength in a range of from about 350 nm to about 500 nm , under Hat 30 degrees Celsius.2. The method as defined in claim 1 , wherein the condensing step includes calcinating.3. The method as defined in claim 2 , wherein the calcinating is done at a temperature greater than 350 degrees Celsius for a time period greater than 10 minutes.4. The method as defined in claim 1 , the metal alkoxide is aluminium alkoxide.5. The method as defined in claim 1 , wherein the silver composition is selected from a group consisting of silver salt of inorganic acids claim 1 , silver salt of organic acids claim 1 , and silver oxides.6. The method as defined in claim 1 , wherein the templating agent comprises a surfactant claim 1 , cyclodextrin claim 1 , or a crown ether.7. The method as defined in claim 1 , controlling the silver loading wherein the silver is present in an amount of at least about 2 weight percent based on a ...

Templated catalyst composition and associated method

A composition includes a templated metal oxide, at least 3 weight percent of silver, and at least one catalytic metal. A method of making and a method of using are included.

Nano-Structured Composite Material and Process of Making for Enclosed Space Air Detoxing and Deodoring

The present invention is related to a nano-structured composite material and process of making for air detoxing and deodoring in enclosed spaces to prevent harmful chemicals in the air from damaging human health. The nano-structured composite material consists of nano-porous carbon, zeolites with sub nano-size pores and at least 1 other component chosen from nano-porous rare earth oxides and nano-sized catalysts, and is made into highly efficient configurations with high geometric surface and low resistance air flow channels. The synergetic action of those nano-structured components can effectively remove toxic chemicals including, but not limited to formaldehyde, benzene, toluene, xylene, propene, butadiene, acetone, carbon monoxide, nitric oxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, ammonia, alcohols, chlorine, mercaptans, as well as bad odors, such cigarette smoke and bathroom/toilet smells.

ALKYLENE OXIDE CATALYST AND USE THEREOF

A supported silver catalyst and use thereof in a process for producing an alkylene oxide, such as ethylene oxide, by the direct oxidation of an alkylene with oxygen or an oxygen-containing gas, wherein the catalyst provides improved stability and improved resilience to reactor upsets and timely recovery to substantially pre-upset levels of catalyst activity and/or efficiency. In some embodiments, the catalyst also exhibits improved activity. A catalyst capable of producing ethylene oxide at a selectivity of at least 87 percent while achieving a work rate of at least 184 kg/h/mat a temperature of no greater than 235° C. when operated in a process where the inlet feed to a reactor containing the catalyst comprises ethylene, oxygen, and carbon dioxide, wherein the concentration of carbon dioxide in the inlet feed is greater than or equal to 2 mole percent. 1. A continuous process for the production of alkylene oxide comprising:providing a supported silver catalyst prepared on an alumina-containing carrier, the carrier comprising greater than about 80 weight percent alpha-alumina and less than about 30 parts per million acid-leachable alkali metals by weight, the weight percent of the alumina and the concentration of the acid-leachable alkali metals being calculated on the weight of the carrier, wherein the acid-leachable alkali metals are selected from lithium, sodium, potassium, and mixtures thereof, the carrier having deposited thereon: (A) silver; (B) at least one first promoter selected from the group consisting of cesium, rubidium, and mixtures thereof; (C) at least one second promoter selected from the group consisting of sodium, lithium, and mixtures thereof; and (D) optionally, one or more additional solid promoters; wherein the deposited sodium, if employed, is present in a concentration from about 10 ppm to about 250 ppm, and wherein the deposited lithium, if employed, is present in a concentration from about 10 ppm to about 500 ppm by weight, the ...

DECOMPOSITION OF HYDROGEN PEROXIDE AND REMOTE UTILITIES SYSTEM

A flow through decomposition unit has a catalyst between an inlet end and an outlet end. A hydrogen peroxide solution, at 70% by weight hydrogen peroxide or less, is pumped into the inlet end. Steam and oxygen are produced at the outlet end. A system and process provide one or more utilities to a facility, for example a natural gas wellhead separator shed. The decomposition process creates heat, which can be used to heat the facility. The oxygen produced under pressure, and can be used to provide a replacement for other pressurized gasses. Optionally, the system may generate electricity. Optionally, water produced in the process may be used for potable water, process water or to dilute a solution of hydrogen peroxide before it is decomposed. The system includes a hydrogen peroxide tank, a decomposition unit with a catalyst, a heat exchanger, optionally a steam knockout and optionally an electrical generator. 1. A system for providing a utility to a facility comprising ,a hydrogen peroxide tank;a decomposition unit with a catalyst and an inlet and an outlet end, the inlet end in communication with the hydrogen peroxide tank; and,(a) a heat exchanger is in communication with the outlet end of the decomposition unit and a room of the facility and/or (b) the outlet end of the decomposition unit is in communication with a pressurized gas system of the facility directly or through a device to compress air and/or (c) an outlet end of the decomposition unit is in communication with a water tank.2. The system of further comprising a fuel cell connected to the hydrogen peroxide tank claim 1 , a turbine or compound steam engine downstream of the decomposition unit claim 1 , or a thermoelectric module connected to the decomposition unit claim 1 , to generate electricity for use in the facility.3. The system of wherein the facility is a natural gas wellhead separator shed.4. The system of wherein the outlet end is connected to an aerator to oxygenate water.5. The system of ...

Porous body precursors, shaped porous bodies, processes for making them, and end-use products based upon the same

The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors comprise a precursor alumina blend capable of enhancing one or more properties of a shaped porous body based thereupon. The need to employ modifiers to achieve a similar result may thus be substantially reduced, or even avoided, and cost savings are thus provided, as well as savings in time and equipment costs.

Selective Hydrogenation Catalyst and Methods of Making and Using Same

A composition comprising an extruded inorganic support comprising an oxide of a metal or metalloid, and at least one catalytically active metal, wherein the extruded inorganic support has pores, a total pore volume, and a pore size distribution, wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum, wherein a first peak has a first maximum of pore diameters of equal to or greater than about 120 nm and a second peak has a second maximum of pore diameters of less than about 120 nm, and wherein greater than or equal to about 5% of a total pore volume of the extruded inorganic support is contained within the first peak of pore diameters. 1. A composition comprising:an agglomerated inorganic support comprising an oxide of a metal or metalloid; andat least one catalytically active Group 10 metal,wherein the agglomerated inorganic support has pores, a total pore volume, and a pore size distribution; wherein the pore size distribution displays at least two peaks of pore diameters, each peak having a maximum; wherein a first peak has a first maximum of pore diameters of equal to or greater than about 120 nm and a second peak has a second maximum of pore diameters of less than about 120 nm; wherein greater than or equal to about 5% of the total pore volume of the agglomerated inorganic support is contained within the first peak of pore diameters; and wherein the composition has a total pore volume of from about 0.1 cc/g to 0.6 cc/g as determined by differential mercury intrusion.2. The composition of wherein the first maximum of the first peak of pore diameters is from about 200 nm to about 9000 nm.3. The composition of wherein greater than or equal to about 10% of the total pore volume of the agglomerated inorganic support is contained within the first peak of pore diameters.4. The composition of wherein the first maximum of the first peak of pore diameters is from about 400 nm to about 8000 nm.5. The composition of ...

Catalyst Unit for Splitting a Decontamination Agent Introduced Into a Containment for a Decontamination Process

The catalyst unit () for splitting a decontamination agent introduced into a containment for a decontamination process has at least one catalyst element (). This catalyst element () first consists of a carrier material made of aluminum ceramics or activated carbon, and also of a catalytically active component in the form of nanoparticles, applied to the carrier material by means of chemical plating, and made of silver or silver oxide or of a silver and silver oxide mixture. The catalytically active component on the at least one catalyst element () is present in the range from 0.05 weight percent to 0.5 weight percent relative to the carrier material. The at least one catalyst element () has a catalytically effective surface in the range of up to 320 mper gram of used material, as a combination of carrier material plus applied catalytically active component. With the catalyst unit (), an non-critical concentration of non-degraded decontamination agent of lower than 0.5 ppm, preferentially a maximum of 0.1 ppm can be achieved. The containment is configured in particular as an isolator, sluice or RABS (Restricted 1. A catalytic unit for splitting a decontamination agent introduced into a containment for the purposes of a decontamination process , whereinthe catalytic unit possesses at least one catalytic element consisting ofa carrier material formed from aluminum ceramic or activated carbon; anda catalytically active component applied to the carrier material by chemical plating and taking the form of nanoparticles formed from silver or silver oxide or a mixture of silver and silver oxide.2. The catalytic unit as claimed in claim 1 , whereinthe catalytically active component comprises from 0.05 weight percent to 0.5 weight percent, of the carrier material in the at least one catalytic element;{'sup': '2', 'the at least one catalytic element has a catalytically effective surface area ranging up to 320 mper gram of catalyst material used, being the combination of carrier ...

POROUS BODIES WITH ENHANCED PORE ARCHITECTURE PREPARED WITHOUT A HIGH-TEMPERATURE BURNOUT MATERIAL

A precursor mixture for producing a porous body, wherein the precursor mixture comprises: (i) at least one milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) non-silicate powder that functions as a binder of the alpha alumina powders, and (iii) at least one burnout material having a particle size of 1-10 microns and a decomposition temperature of less than 550° C., with the proviso that a burnout material having a decomposition temperature of 550° C. or greater is excluded from the precursor mixture. 1. A method for producing a porous body , the method comprising:providing a precursor mixture comprising (i) milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) non-silicate binder of the alpha alumina powders, and (iii) a burnout material having a particle size of 1-10 microns and a decomposition temperature of less than 550° C., with the proviso that a burnout material having a decomposition temperature of 550° C. or above is excluded;forming the precursor mixture into a predetermined shape; andsubjecting the shape to a heat treatment step in which the shape is sintered to produce the porous body.2. The method of claim 12 , further comprising unmilled alpha alumina powder having a particle size of 10 to 100 microns in said precursor mixture.3. The method of claim 13 , wherein the weight ratio of milled to unmilled alpha alumina powder is in a range of 0.25:1 to about 5:1.4. The method of claim 12 , wherein unmilled alpha alumina powder is excluded from the precursor mixture.5. The precursor mixture of claim 12 , wherein the non-silicate binder is nano-sized boehmite6. The method of claim 12 , wherein the providing the precursor mixture comprises:(i) dispersing said non-silicate binder into water to produce a dispersion of said binder;(ii) adding said milled alpha alumina powder having a particle size of 0.1 to 6 microns to the dispersion of the non-silicate binder, and mixing until a first homogeneous mixture is ...

SELECTIVE HYDROGENATION CATALYST COMPRISING AN EXTRUDED SUPPORT

A catalyst comprising palladium, a porous support comprising at least one refractory oxide selected from the group constituted by silica, alumina and silica-alumina, the palladium content in the catalyst being in the range 0.01% to 2% by weight with respect to the total catalyst weight, at least 80% by weight of the palladium being distributed in a crust at the periphery of said support, the thickness of said crust being in the range 20 to 100 μm, characterized in that said support is in the form of an extrudate and in that said support comprises a specific surface area in the range 165 to 250 m/g. 1. A catalyst comprising palladium , a porous support comprising at least one refractory oxide selected from the group constituted by silica , alumina and silica-alumina , the palladium content in the catalyst being in the range 0.01% to 2% by weight with respect to the total catalyst weight , at least 80% by weight of the palladium being distributed in a crust at the periphery of said support , the thickness of said crust being in the range 20 to 100 μm , characterized in that said support is in the form of an extrudate and comprises a specific surface area in the range 165 to 250 m/g.2. The catalyst as claimed in claim 1 , characterized in that said porous support is in the form of an extrudate comprising a length h in the range 2 to 10 mm.3. The catalyst as claimed in claim 1 , characterized in that said porous support comprises a section comprising at least three lobes.4. The catalyst as claimed in claim 3 , in which the number of lobes of the extrudate claim 3 , n claim 3 , is selected from the group constituted by the integer values 3 claim 3 , 4 claim 3 , 5 claim 3 , 6 claim 3 , 7 claim 3 , 8 claim 3 , 9 and 10.5. The catalyst as claimed in claim 3 , in which the number of lobes claim 3 , n claim 3 , is selected from the group constituted by the integer values 3 and 4.6. The catalyst as claimed in claim 1 , characterized in that the extrudate is in the form of a ...

MULTI-LOBED POROUS CERAMIC BODY AND PROCESS FOR MAKING THE SAME

A carrier having at least three lobes, a first end, a second end, a wall between the ends and a non-uniform radius of transition at the intersection of an end and the wall is disclosed. A catalyst comprising the carrier, silver and promoters deposited on the carrier and useful for the epoxidation of olefins is also disclosed. A method for making the carrier, a method for making the catalyst and a process for epoxidation of an olefin with the catalyst are also disclosed. 1. A porous ceramic body , comprising: a first end; a second end; and a wall disposed between and intersecting said ends , said wall comprising at least three lobes and three valleys formed in the length of the wall , said lobes rounded at the intersection of said first end and said wall and said valleys not rounded at the intersection of said first end and said wall , each valley located between two of said lobes; wherein said ceramic body comprises a first radius located at the apex of a lobe and a second radius located at a nadir between two adjacent lobes and said first radius is larger than said second radius.2. The porous ceramic body of wherein said first radius is at least three times greater than said second radius. This application is a continuation of U.S. application Ser. No. 15/638,887, filed Jun. 30, 2017, granted on May 15, 2018 as U.S. Pat. No. 9,968,923, which is a continuation of U.S. application Ser. No. 14/677,090, filed Apr. 2, 2015, granted on Jul. 4, 2017 as U.S. Pat. No. 9,694,355, which is a continuation of U.S. application Ser. No. 14/524,226 filed Oct. 27, 2014, granted on Apr. 7, 2015 as U.S. Pat. No. 8,999,887, which is a divisional of U.S. application Ser. No. 13/316783 filed Dec. 12, 2011, granted on Oct. 28, 2014 as U.S. Pat. No. 8,871,677, which claims the benefit of U.S. Provisional Application No. 61/428,009 filed Dec. 29, 2010.This invention relates to porous ceramic bodies having a contoured shape that is particularly suitable for use as a carrier for ...

CORE-SHELL CATALYST AND OXYGEN REDUCTION METHOD

Provided is a catalyst having a core-shell structure (which employs a core comprised of a highly electrochemically stable, relatively inexpensive material and thereby reduces the amount of platinum used, while providing a better cost/performance ratio in catalytic activity as compared to when platinum particles are used as a catalyst) for use in an oxygen reduction reaction (cathode reaction in a fuel cell), and to provide an oxygen reduction method using the catalyst. Provided is a core-shell catalyst for use for an oxygen reduction reaction, including: a core that is comprised of silver; and a shell layer that comprised of platinum, the shell layer being comprised of platinum atoms constituting a (111) plane of or a (001) plane of a face centered cubic lattice, in the shell layer, a nearest neighbor platinum-platinum interatomic distance falling within the range of from 2.81 {acute over (Å)} to 2.95 {acute over (Å)}. 1. A core-shell catalyst for use for an oxygen reduction reaction , comprising:a core that comprises silver; anda shell layer that comprises platinum, whereinat an interface between the core and the shell layer, silver atoms in an outermost layer of the core constitute a (111) plane of a face centered cubic lattice,a plurality of platinum atoms that constitute the shell layer constitute a (111) plane of a face centered cubic lattice, the (111) plane constituted by the plurality of platinum atoms residing on the (111) plane constituted by the silver atoms, andin the shell layer, a nearest neighbor platinum-platinum interatomic distance falls within the range of from 2.81 {acute over (Å)} to 2.95 {acute over (Å)}.2. (canceled)3. A core-shell catalyst for use for an oxygen reduction reaction , comprising:a core that comprises silver; anda shell layer that comprises platinum, whereinat an interface between the core and the shell layer, silver atoms in an outermost layer of the core constitute a (001) plane of a face centered cubic lattice,a plurality of ...

Ag-Pd CORE-SHELL PARTICLE AND USE THEREOF

The manufacturing method provided by the present invention provides a powder material substantially comprising Ag—Pd core-shell particles consisting of Ag core particles containing silver as a principal constituent element and a Pd shell containing palladium as a principal constituent element covering at least part of the surface of the Ag core particles, wherein hydroquinone and/or a quinone is attached to the surface of the Ag—Pd core-shell particles. 1. A powder material substantially comprising Ag—Pd core-shell particles consisting of Ag core particles containing silver as a principal constituent element and a Pd shell containing palladium as a principal constituent element covering at least part of the surface of the Ag core particles , wherein hydroquinone and/or a quinone is attached to the surface of the Ag—Pd core-shell particles.2. The powder material according to claim 1 , wherein with the powder material dispersed in a specific medium claim 1 , the powder material has a Z average particle diameter (D) based on the dynamic light scattering (DLS) method of 0.1 μm to 2 μm claim 1 , and a polydispersity index (PDI) based on the dynamic light scattering method of 0.4 or lower.3. The powder material according to claim 2 , wherein the powder material has a ratio D/Dof the Z average particle diameter (D) to the average particle diameter (D) based on field emission scanning electron microscope imaging (FE-SEM imaging) of 2 or lower.4. The powder material according to claim 1 , wherein with the powder material dispersed in a specific medium claim 1 , the powder material has a peak intensity in the peak particle size range of 0.1 μm to 2 μm in a particle size distribution based on an NNLS algorithm using the dynamic light scattering method of 80% or more of the total peak intensity based on scattering intensity.5. The powder material according to claim 1 , wherein polyvinylpyrrolidone (PVP) is also attached to the surface of the Ag—Pd core-shell particles.6. A ...

U-CARBON: A NOVEL METALLIC AND MAGNETIC CARBON MATERIAL

A 3-dimensional crystalline carbon material that is magnetic and metallic under ambient conditions is provided. The material, denominated U-carbon, has been synthesized using the molecular precursor, 3, 3-dimethyl-1-butene (CH). Depending on the atomic connections made between the carbon atoms of the material, U-Carbon forms structures that exhibit semiconducting and nonmagnetic to metallic and ferromagnetic behaviors. The use of selected molecular precursors (such as 3, 3-dimethyl-1-butene CH) that support crystal growth based on clustered rather than individual atoms is a paradigm shift in materials development. Rationally designed metastable materials with desirable properties, including U-Carbon, can have many scientific and technological applications. 1. A 3-dimensional (3-D) U-carbon material comprising one or more pure sp2 , pure sp3 , and/or sp2-sp3 hybrid crystalline phases , wherein the one or more pure sp2 , pure sp3 , and/or sp2-sp3 hybrid crystalline phases are formed from buckled sp2-sp3 hybrid layers containing both 4 and 6 membered carbon rings.2. The 3-D U-carbon of claim 1 , wherein the buckled sp2-sp3 hybrid layers are stacked within the 3-D U-carbon according to available atomic and/or energetic constraints.3. The 3-D U-carbon material of claim 1 , wherein the U-carbon material is magnetic and/or electrically conductive.4. The 3-D U-carbon material of in the form of a sheet claim 1 , flake claim 1 , particle claim 1 , or granule.5. The 3-D U-carbon material configured as a magnet claim 1 , ferromagnet claim 1 , or magnetic dopant.6. A 3-D U-carbon material claim 1 , made by the process of catalyzing a reaction of 3 claim 1 ,3-dimethyl-1-butene (CH) to form a 3-dimensional material with one or more pure sp2 claim 1 , pure sp3 claim 1 , and/or sp2-sp3 hybrid crystalline phases.7. A method of making the 3-D U-carbon material of claim 1 , comprising{'sub': 6', '12, 'depositing a precursor 3,3-dimethyl-1-butene (CH) onto a support, and'}catalyzing a ...

SELECTIVE HYDROGENATION METHODS

The present disclosure relates to methods for selectively hydrogenating acetylene, to methods for starting up a selective hydrogenation reactor, and to hydrogenation catalysts useful in such methods. In one aspect, the disclosure provides a method for selectively hydrogenating acetylene, the method comprising contacting a catalyst composition with a process gas. The catalyst composition comprises a porous support, palladium, and one or more ionic liquids. The process gas includes ethylene, present in the process gas in an amount of at least 20 mol. %; acetylene, present in the process gas in an amount of at least 1 ppm; and 0 to 190 ppm or at least 600 ppm carbon monoxide. At least 90% of the acetylene present in the process gas is hydrogenated, and the selective hydrogenation is conducted without thermal runaway. 2. A method according to claim 1 , wherein carbon monoxide is present in the process gas in an amount up to 150 ppm.3. A method according to claim 1 , wherein carbon monoxide is present in the process gas in an amount up to 85 ppm.5. A method according to claim 4 , wherein carbon monoxide is present in the process gas in an amount within the range of 1000 ppm to 20 claim 4 ,000 ppm.6. A method according to claim 1 , wherein the process gas is contacted with the catalyst at a gas hourly space velocity (GHSV) within the range of 2 claim 1 ,000 hto 40 claim 1 ,000 h.7. A method according to claim 1 , wherein the process gas is contacted with the catalyst at a GHSV within the range of 7 claim 1 ,100 hto 40 claim 1 ,000 h.8. A method according to claim 1 , wherein the selective hydrogenation is conducted at a temperature within the range of 20° C. to 140° C.9. A method according to claim 1 , wherein at least 95% of the acetylene present in the process gas is hydrogenated.10. A method according to claim 1 , wherein the amount of ethane in the product of the selective hydrogenation is no more than 0.5 mol. % greater than the amount of ethane in the process gas.11 ...

Selective hydrogenation methods and catalysts

The present disclosure relates to methods for selectively hydrogenating acetylene, to methods for starting up a selective hydrogenation reactor, and to hydrogenation catalysts useful in such methods. In one aspect, the disclosure provides a method for selectively hydrogenating acetylene, the method comprising contacting a catalyst composition with a process gas. The catalyst composition comprises a porous support, palladium, and one or more ionic liquids. The process gas includes ethylene, present in the process gas in an amount of at least 20 mol. %; and acetylene, present in the process gas in an amount of at least 1 ppm. At least 90% of the acetylene present in the process gas is hydrogenated, and the selective hydrogenation is conducted without thermal runaway. Notably, the process gas is contacted with the catalyst at a gas hourly space velocity (GHSV) based on total catalyst volume in one bed or multiple beds of at least 7,100 h−1.

Selective Hydrogenation Catalyst and Methods of Making and Using Same

A method of making a selective hydrogenation catalyst comprising contacting a support with a palladium-containing compound to form a supported-palladium composition; contacting the supported-palladium composition with an organophosphorus compound and a weak acid to form a catalyst composition; and reducing the catalyst composition to form the catalyst. A method of making a selective hydrogenation catalyst comprising contacting an alumina support with a palladium-containing compound to form a supported-palladium composition; contacting the supported-palladium composition with silver nitrate and potassium fluoride to form a mixture; contacting the mixture with an organophosphorus compound and a weak acid to form a catalyst precursor; and reducing the catalyst precursor to form the catalyst. 1. A method of making a selective hydrogenation catalyst comprising:contacting a support with a palladium-containing compound to form a supported-palladium composition;contacting the supported-palladium composition with an organophosphorus compound and a weak acid to form a selective hydrogenation catalyst composition; andreducing the selective hydrogenation catalyst composition to form the selective hydrogenation catalyst.2. The method of wherein the organophosphorus compound is represented by the general formula (R)(OR′)P═O claim 1 , wherein x and y are integers ranging from 0 to 3 and x plus y equals 3 claim 1 , wherein each R is hydrogen claim 1 , a hydrocarbyl group claim 1 , or combinations thereof; and wherein each R′ is a hydrocarbyl group3. The method of wherein the organophosphorus compound comprises a phosphine oxide claim 1 , a phosphinate claim 1 , a phosphonate claim 1 , a phosphate claim 1 , or combinations thereof.4. The method of wherein the organophosphorus compound is a product of an organophosphorus compound precursor represented by the general formula of (R)(OR′)P claim 1 , wherein x and y are integers ranging from 0 to 3 and x plus y equals 3 claim 1 , wherein ...

NANOCRYSTALLINE COMPOSITE CATALYST FOR STORING/SUPPLYING HYDROGEN, NANOCRYSTALLINE COMPOSITE CATALYST MIXTURE FOR STORING/SUPPLYING HYDROGEN, AND METHOD FOR SUPPLYING HYDROGEN

The present disclosure provides that a catalyst exhibits excellent catalytic activity in both a hydrogenation involving a hydrogen-storing body containing an aromatic compound, and a dehydrogenation involving a hydrogen-supplying body containing a hydrogen derivative of the aromatic compound, wherein the catalyst contains a nanocrystalline composite having two or more accumulated flake-like nanocrystalline pieces in a connected state, the flake-like nanocrystalline pieces each having a main surface and an end surface, and in that the nanocrystalline composite is configured such that, when two adjacent nanocrystalline pieces are viewed, an end surface of at least one of the nanocrystalline pieces is connected. 1. A nanocrystalline composite catalyst for storing/supplying hydrogen exhibiting excellent catalytic activity in both a hydrogenation involving a hydrogen-storing body containing an aromatic compound , and a dehydrogenation involving a hydrogen-supplying body containing a hydrogen derivative of the aromatic compound ,the catalyst contains a nanocrystalline composite having two or more accumulated flake-like nanocrystalline pieces in a connected state, the flake-like nanocrystalline pieces each having a main surface and an end surface; andthe nanocrystalline composite is configured such that, when two adjacent nanocrystalline pieces are viewed, an end surface of at least one of the nanocrystalline pieces is connected.2. The nanocrystalline composite catalyst for storing/supplying hydrogen according to claim 1 , wherein:the catalyst further contains a base material; andat least one nanocrystalline piece forming the nanocrystalline composite is configured to be connected to a surface of the base material.3. The nanocrystalline composite catalyst for storing/supplying hydrogen according to claim 1 , wherein the nanocrystalline composite is a nanocrystalline metal composite in which the nanocrystalline piece forming the nanocrystalline composite contains one or two ...

Vertically aligned mesoporous thin film, method of manufacturing the same, and catalytic application thereof

This invention relates to a vertically aligned mesoporous silicate film with site-selective metal deposition from a single polymeric precursor and to diverse catalytic applications thereof. There is an innovative approach of a single precursor to manufacture a vertically aligned mesoporous silicate thin film having high thermal and chemical resistance on a large-area silicon wafer (2 cm×3 cm). A precisely designed organic-inorganic block copolymer (BCP) polyethyleneoxide-ss-polyvinylcyclicsilazane (PEO-ss-PVCSZ) with a disulfide bridge that is chemically cleavable is newly synthesized as the single precursor for an oriented silicate nanoporous film, and using such a precursor, solvent annealing, self-assembling, block cleaving treatment, and then hydrolysis conversion of a polymer into a siliceous phase at room temperature are carried out, thus directly forming a mesostructure on the substrate.

MODIFIED CARRIER FOR SILVER BASED ETHYLENE OXIDE CATALYST

Silver based ethylene oxide catalysts having enhanced stability are disclosed. The enhanced stability silver based ethylene oxide catalysts include an alumina carrier which has been modified to include cavities on the surface of the carrier. The presence of the cavities on the surface of the modified carrier stops or at least impedes the motion of silver particles on the surface of the carrier during an epoxidation process. In particular, the cavities on the surface of the alumina carrier effectively trap and/or anchor silver particles and prevent them from further motion. 1. A method of forming an alumina carrier , said method comprising:providing an admixture of reactive particles dispersed on a surface of alumina particles, wherein said reactive particles comprise a different material than said alumina particles;forming said admixture into a predetermined shape;sintering the admixture to form an alumina carrier having said predetermined shape and comprising sacrificial particles located on the surface and embedded within a portion of each alumina particle, wherein each sacrificial particle comprises a material containing an element of the reactive particle-Al—O, has a different phase than the alumina particles, and has a higher solubility in a solvent than the alumina particles; andremoving at least a portion of said sacrificial particles from each of the alumina particles using the solvent to form cavities in the surface of each of the alumina particles.2. The method of claim 1 , wherein said providing the admixture comprises adding a dispersion of said reactive particles to said alumina particles.3. The method of claim 1 , wherein said reactive particles comprise metal oxide particles.4. The method of claim 3 , wherein said metal oxide particles are selected from the group consisting of zinc (Zn) oxide claim 3 , calcium (Ca) oxide claim 3 , magnesium (Mg) oxide claim 3 , boron (B) oxide and mixtures thereof.5. The method of claim 1 , wherein said reactive ...

POROUS BODIES WITH ENHANCED PORE ARCHITECTURE

A porous body is provided with enhanced fluid transport properties that is capable of performing or facilitating separations, or performing reactions and/or providing areas for such separations or reactions to take place. The porous body includes at least 80 percent alpha alumina and has a pore volume from 0.3 mL/g to 1.2 mL/g and a surface area from 0.3 m/g to 3.0 m/g. The porous body further includes a pore architecture that provides at least one of a tortuosity of 7.0 or less, a constriction of 4.0 or less and a permeability of 30 mdarcys or greater. The porous body can be used in a wide variety of applications such as, for example, as a filter, as a membrane or as a catalyst carrier. 1. A method for producing a porous body , the method comprising:providing a precursor mixture comprising (i) milled alpha alumina powder having a particle size of 0.1 to 6 microns, (ii) a non-silicate binder, and (iii) a principle burnout material having a particle size of 1-10 microns;forming a predetermined shape; andsubjecting the shape to a heat treatment step in which the shape is sintered to produce the porous body.2. The method of claim 1 , wherein the porous body comprises at least 80 percent alpha alumina and having a pore volume from 0.3 mL/g to 1.2 mL/g claim 1 , a surface area from 0.3 m/g to 3.0 m/g claim 1 , and a pore architecture that provides at least one of a tortuosity of 7 or less claim 1 , a constriction of 4 or less and a permeability of 30 mdarcys or greater.3. The method of claim 1 , wherein the providing the precursor mixture comprises providing a homogenous mixture of the milled alpha alumina powder claim 1 , the non-silicate binder claim 1 , and the principle burnout material.4. The method of claim 1 , wherein the principle burnout material is a granulated polyolefin.5. The method of claim 1 , wherein the granulated polyolefin is one of polyethylene and polypropylene.6. The method of claim 1 , wherein the precursor mixture further comprises at least one of ...

EPOXIDATION PROCESS

A method is provided for improving the performance of a silver-based epoxidation catalyst comprising a carrier. The carrier includes at least 80 percent alpha alumina and has a pore volume from 0.3 mL/g to 1.2 mL/g, a surface area from 0.3 m/g to 3.0 m/g, and a pore architecture that provides at least one of a tortuosity of 7 or less, a constriction of 4 or less and a permeability of 30 mdarcys or greater. A catalytic amount of silver and a promoting amount of one or more promoters is disposed on and/or in said carrier. The method further includes the steps of initiating an epoxidation reaction by reacting a feed gas composition containing ethylene and oxygen present in a ratio of from about 3.5:1 to about 12:1, in the presence of the silver-based epoxidation catalyst at a temperature of about 200° C. to about 230° C., and subsequently increasing the temperature either stepwise or continuously. 1. A method of improving the performance of a silver-based epoxidation catalyst comprising a carrier comprising at least 80 percent alpha alumina and having a pore volume from 0.3 mL/g to 1.2 mL/g , a surface area from 0.3 m/g to 3.0 m/g , and a pore architecture that provides at least one of a tortuosity of 7 or less , a constriction of 4 or less and a permeability of 30 mdarcys or greater; a catalytic amount of silver disposed on and/or in said carrier; and a promoting amount of one or more promoters disposed on said carrier; which method further comprises:initiating an epoxidation reaction by reacting a feed gas composition containing ethylene and oxygen present in a ratio of from about 2.5:1 to about 12:1, in the presence of the silver-based epoxidation catalyst at a temperature of about 200° C. to about 230° C.; andsubsequently increasing the temperature either stepwise or continuously.2. The method according to claim 1 , wherein the subsequently increasing step is conducted stepwise.3. The method according to claim 1 , wherein the feed gas composition contains about 20 ...

CATALYST AND METHOD OF MANUFACTURE

Disclosed herein is a catalytic composition comprising a first catalyst composition portion that comprises a zeolite; and a second catalyst composition portion that comprises a catalytic metal disposed upon a porous inorganic substrate; the first catalyst composition portion and the second catalyst composition portion being in an intimate mixture. 2. The system as defined in wherein the ferrierite has a silicon to aluminum weight ratio in a range of from about 10 to about 30.3. The system as defined in wherein the ferrierite has a surface area in a range of from about 200 m/gm to about 500 m/gm.4. The system as defined in wherein the first catalyst composition is present in an amount in a range of from about 1 to about 80 weight percent claim 1 , based upon the total weight of the first catalytic composition and the second catalytic composition.5. The system as defined in claim 4 , wherein the first catalyst is present in an amount in a range from about 3.5 to about 8 weight percent claim 4 , based upon the total weight of the first catalytic composition and the second catalytic composition.6. The system as defined in wherein the mixture is supported on a monolith.7. The system as defined in claim 1 , wherein the mixture is supported on a substrate that is washcoated with the first catalyst composition and the second catalyst composition.9. A catalytic system according to wherein the second catalyst composition is comprised of about 1 mol % Ag to about 5 mol % Ag on porous AlOparticles.10. A catalytic system according to wherein the second catalyst composition is comprised of about 2 wt % Ag on porous AlOparticles.11. A catalytic system according to wherein the ferrierite particles are in contact with particles of the second catalyst composition in a weight ratio of 1:4 to 4:112. A catalytic system for the conversion of nitrogen oxides in exhaust gases comprising an intimate mixture comprised ofa first catalyst composition comprised of particles of a ferrierite that ...

SULFUR TERMINATED ORGANOSILICA MATERIALS AND USES THEREOF

Provided herein are compositions and methods for use of an organosilica material comprising a copolymer of at least one monomer of Formula [RRSiCH](I), wherein, Rrepresents a C-Calkoxy group; and Ris a C-Calkoxy group or a C-Calkyl group; and at least one other monomer of Formula [(ZO)ZSi—Z—SZ] (II), wherein, Zrepresents a hydrolysable functional group; Zrepresents a C-Calkyl or aryl group; Zrepresents a C-Ccyclic or linear hydrocarbon; Zis either H or OH; and x represents any one of integers 1, 2, and 3. The composition may be used as a support material to covalently attach transition metal cations, as a sorbent for olefin/paraffin separations, as a catalyst support for hydrogenation reactions, as a precursor for highly dispersed metal nanoparticles, or as a polar sorbent for crude feeds. 1. An organosilica material comprising a copolymer of{'sup': 1', '2, 'sub': 2', '3, 'claim-text': [{'sup': '1', 'sub': 1', '4, 'Rrepresents a C-Calkoxy group; and'}, {'sup': '2', 'sub': 1', '4', '1', '4, 'Ris a C-Calkoxy group or a C-Calkyl group; and'}], 'at least one monomer of Formula [RRSiCH](I), wherein{'sup': 1', '2', '3', '4, 'sub': x', '3-x, 'claim-text': [{'sup': '1', 'Zrepresents a hydrolysable functional group;'}, {'sup': '2', 'sub': 1', '10, 'Zrepresents a C-Calkyl or aryl group;'}, {'sup': '3', 'sub': 2', '11, 'Zrepresents a C-Ccyclic or linear hydrocarbon;'}, {'sup': '4', 'sub': '3', 'Zis either H or OH; and'}, 'x represents any one of integers 1, 2, and 3., 'at least one other monomer of Formula [(ZO)ZSi—Z—SZ] (II), wherein2. The organosilica material of claim 1 , wherein Zhas incorporated within the C-Ccyclic or linear hydrocarbon (a) an amine claim 1 , (b) an ether claim 1 , (c) a heteroatom claim 1 , (d) a combination of any of (a) claim 1 , (b) claim 1 , and (c) claim 1 , or none of (a) claim 1 , (b) claim 1 , and (c) claim 1 , provided that Si and S remain bonded to a carbon atom.3. The organosilica material of claim 1 , further comprising a catalyst metal.4. ...

Air-Filtering Anti-Bacterial Lighting Apparatus

An anti-bacterial lighting apparatus includes one translucent housing, at least one light source, and an air circulation mechanism. The translucent housing is air permeable, has as least one air inflow port, and has an anti-bacterial photocatalytic film on its inside surface. The at least one light source is inside the housing, and its light activates the anti-bacterial photocatalytic film on the housing. The air circulation mechanism, such as a fan, is at the air inflow port of the housing. It sucks the ambient air from outside the housing and forces the air through the air-permeable housing. The air-permeable housing traps airborne bacteria and viruses, and the activated anti-bacterial photocatalytic film kills the trapped bacteria and viruses. Moreover, the light shines through the translucent housing while the apparatus is filtering the air and killing the airborne bacteria and viruses. 1. A lighting apparatus , comprising:one translucent housing;at least one light source; and an air circulation mechanism, the translucent housing is air permeable, contains as least one air inflow port, and is coated with an anti-bacterial photocatalytic film on its inside surface,', 'the at least one light source is disposed inside the housing, and its light shines through the translucent housing and activates the anti-bacterial photocatalytic film on the housing,', 'the air circulation mechanism is disposed at the air inflow port of the housing, sucks an ambient air from outside the housing, and forces the air through the air-permeable housing, and', 'the translucent housing traps airborne bacteria and viruses, and the activated anti-bacterial photocatalytic film kills the trapped bacteria and viruses., 'wherein2. The lighting apparatus of claim 1 , wherein a main active ingredient of the anti-bacterial photocatalytic film is titanium dioxide (TiO).3. The lighting apparatus of claim 2 , wherein the main active ingredient is rhombus-shaped anatase-type titanium dioxide (TiO).4. ...

PROCESS FOR PREPARING AN EPOXIDATION CATALYST

A process for preparing a silver-containing catalyst for the oxidation of ethylene to ethylene oxide (EO) including the steps of: providing a support having pores; providing a silver-containing impregnation solution; adding an amount of surfactant to the impregnation solution; contacting the support with the surfactant-containing impregnation solution; and removing at least a portion of the impregnation solution prior to fixing the silver upon the carrier in a manner which preferentially removes impregnation solution not contained in the pores. The use of the surfactant results in improved drainage of the silver impregnation solution from the carrier exteriors during the catalyst synthesis. As a result, the amount of silver-containing impregnation solution necessary for the synthesis of the EO catalyst was reduced by up to 15% without reducing the catalyst performance. 1. A process for preparing a silver-containing catalyst suitable for the oxidation of ethylene to ethylene oxide (EO) comprising the steps of:(a) providing a support having pores;(b) providing a silver-containing impregnation solution;(c) adding an amount of surfactant to the impregnation solution;(d) contacting the support with the surfactant-containing impregnation solution;(e) removing at least a portion of the impregnation solution prior to fixing the silver upon the carrier in a manner which preferentially removes impregnation solution not contained in the pores.2. The process of further comprising the additional step of:(f) roasting at least once, the impregnated catalyst support member from step (d) for a time and temperature sufficient to form a silver-containing catalyst useful for the epoxidation of olefins.3. The process of claim 1 , wherein the preferential removing step (d) is carried out using a centrifuge.4. The process of claim 1 , wherein the preferential removing step (e) is carried out by allowing the impregnated catalyst support member to drain using gravity.5. The process of claim ...

PLATING CATALYST AND METHOD

A solution including a precious metal nanoparticle and a polymer polymerized from at least two monomers, (1) a monomer having two or more carboxyl groups or carboxyl acid salt groups and (2) a monomer which has π electron-available features. The solution is useful for a catalyst of a process for electroless plating a metal on non-conductive surface. 17-. (canceled)8: A process for electroless plating a metal on non-conductive surface , wherein the process comprises the steps:a) dipping a substrate to be plated into a catalyst solution comprising precious metal nanoparticles stabilized by a polymer, wherein the polymer is polymerized from at least two monomers, (1) a monomer having two or more carboxyl groups or carboxyl acid salt groups and (2) a monomer selected from the groups consisting of aromatic vinyl monomer, aromatic allyl monomer and alkadiene; andb) conducting electroless plating of the substrate.9: The process of claim 8 , wherein the monomer (2) is selected from the group consisting of styrene claim 8 , substituted styrene and butadiene.10: The process of claim 8 , wherein the monomer (1) is maleic acid or salts thereof.11: The process of claim 8 , wherein the precious metal nanoparticles are palladium. The present invention relates to a catalyst solution comprising a precious metal nanoparticle, and more particularly, a catalyst solution comprising a precious metal nanoparticle stabilized by a specific compound useful in electroless metal plating of non-conductive substrates and used in the manufacture of electronic devices and decorative coating.Electroless metal deposition or plating is useful for the deposition of a metal or mixture of metals on a non-conductive or dielectric surface in the absence of an electric source. Plating on non-conductive or dielectric substrates is used in a variety of industries, including decorative plating and electronic device fabrication. One of the main applications is the manufacture of printed circuit boards. The ...

VISIBLE LIGHT RESPONSE CATALYST STRUCTURE AND PROCESS FOR MANUFACTURING THE SAME

A visible light response photocatalyst structure and a process for manufacturing the same are disclosed, where the structure is manufactured by the GRR for two times, so that the structure has a large surface area, high surface activity, being apt to get integrated with a silicon substrate and endurable to the environment, and further has the rapid and simple manufacturing characteristics without any additional energy required and has a high reproductively. 1. A light visible response photocatalyst structure , comprising:a silicon substrate;a silver nano-layer, growing on a surface of the silicon substrate through a first galvanic replacement reaction (GRR) and having a solid dendritic shape after experiencing the first GRR;a precious metal layer, growing on a surface of the silver nano-layer through a second GRR; anda silver chloride layer, growing on a surface of the precious metal layer through the second GRR,wherein, the silver-nano-layer has a hollow dendritic shape after experiencing the second GRR.2. The light visible response photocatalyst structure as claimed in claim 1 , wherein the first GRR is a fluorine ions assisted GRR claim 1 , so that the silver nano-layer grows on the surface of the silicon substrate.3. The light visible response photocatalyst structure as claimed in claim 1 , wherein the precious metal layer which growing on the surface of the silver nano-layer through the second GRR has a precious metal material portion comprising gold (Au) claim 1 , palladium (Pd) claim 1 , and platinum (Pt).4. The light visible response photocatalyst structure as claimed in claim 1 , wherein the first GRR has a reaction equation: Si+4Ag+6HF→4Ag+HSiF+4H.5. The light visible response photocatalyst structure as claimed in claim 1 , wherein the second GRR has a reaction equation: 4Ag+(PtCl)→Pt+4AgCl+2Cl.6. The light visible response photocatalyst structure as claimed in claim 1 , wherein the second GRR has a reaction equation: 4Ag+HAuCl→Au+4AgCl+1/2H.7. The light ...

COMPOSITE FILAMENTS HAVING THIN CLADDINGS, ARRAYS OF COMPOSITE FILAMENTS, FABRICATION AND APPLICATIONS THEREOF

A method of fabricating composite filaments is provided. An initial composite filament including a core and a cladding (such as a Pt-group metal) is cut into smaller pieces (or is first mechanically reduced and then cut into smaller pieces). The smaller pieces of the filaments are inserted into a metal matrix, and the entire structure is then further reduced mechanically in a series of reduction steps. The process can be repeated until the desired cross sectional dimension of the filaments is achieved. The matrix can then be chemically removed to isolate the final composite filaments with the cladding thickness down to the nanometer range. The process allows the organization and integration of filaments of different sizes, compositions, and functionalities into arrays suitable for various applications. Materials and components made from such composite filaments and arrays of composite filaments are also disclosed. 1. A method of fabricating micro-sized composite filaments from an initial composite filament having a first cross sectional dimension , the initial composite filament including a core made from a first material and a cladding made from a second material and enclosing the core , comprising:(a) mechanically reducing the initial composite filament to produce an intermediate composite filament having a reduced cross sectional dimension;(b) cutting the intermediate composite filament into two or more shorter filaments;(c) inserting the two or more shorter composite filaments side by side into a first matrix made from a third material;(d) mechanically reducing the first matrix with the two or more shorter filaments to further reduce the cross sectional dimensions of the two or more shorter filaments; and(e) isolating the two or more shorter filaments having further reduced cross sectional dimensions obtained from (d) from the first matrix.2. The method of claim 1 , wherein obtaining the initial composite filament comprises inserting the core into a tube of the ...

COMPOSITE POWDER, HYBRID MATERIAL THEREOF, AND COMPOSITE THIN FILM THEREOF

Provided is a composite powder used for the visible light catalytic and anti-bacterial purposes. The composite powder includes a plurality of N-type semiconductor particles and a plurality of P-type semiconductor nano-particles. The P-type semiconductor nano-particles cover surfaces of the N-type semiconductor particles respectively. A weight ratio of the N-type semiconductor particles and the P-type semiconductor nano-particles is in a range of 1:0.1 to 1:0.5. A PN junction is provided between each of the N-type semiconductor particles and the corresponding P-type semiconductor nano-particles. 1. A composite powder used for the visible light catalytic and anti-bacterial purposes , comprising:a plurality of N-type semiconductor particles; anda plurality of P-type semiconductor nano-particles covering surfaces of the N-type semiconductor particles respectively, and a weight ratio of the N-type semiconductor particles and the P-type semiconductor nano-particles is in a range of 1:0.1 to 1:0.5, whereina PN junction is provided between each of the N-type semiconductor particles and the corresponding P-type semiconductor nano-particles.2. The composite powder according to claim 1 , wherein a material of the N-type semiconductor particles comprises zinc oxide claim 1 , and a material of the P-type semiconductor nano-particles comprises silver oxide.3. The composite powder according to claim 1 , wherein a particle size of the N-type semiconductor particles is in a range of 0.1 μm to 5 μm claim 1 , and a particle size of the P-type semiconductor nano-particles is in a range of 1 nm to 50 nm.4. The composite powder according to claim 1 , wherein the P-type semiconductor nano-particles are uniformly distributed on the surfaces of the N-type semiconductor particles.5. A composite thin film used for the visible light catalytic and anti-bacterial purposes claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the composite powder according to , wherein the ...

Photocatalytic composition for water purification

The present invention refers to lightweight and settable photocatalytic compositions and solid composites; methods of preparing the compositions and solid composites; and their use in water purification. The compositions are comprised of photocatalysts such as titanium dioxide (TiO 2 ) and zinc oxide (ZnO), lightweight glass bubbles, and a hydraulic cementing binder. The lightweight and settable photocatalytic compositions can be formed into lightweight photocatalytic solid composites and/or structures by mixing with water and moist curing. This invention also describes relatively simple, fast, and cost effective methodologies to photodope the TiO 2 —ZnO compositions and composites with silver (Ag), to enhance and extend the photocatalytic activity from the ultraviolet into the visible light spectrum. The lightweight and settable TiO 2 —ZnO and Ag—TiO 2 —ZnO compositions are used in making solids, structures, coatings, and continuous or semi-continuous water purification panels for purifying contaminated water.

NON-AQUEOUS METAL CATALYTIC COMPOSITION WITH OXYAZINIUM PHOTOREDUCING AGENT

A non-aqueous metal catalytic composition includes (a) a silver complex comprising reducible silver ions, (b) an organic phosphite, (c) an oxyazinium salt silver ion photoreducing agent, (d) a hindered pyridine, (e) a photocurable component, a non-curable polymer, or combination of a photocurable component and a non-curable polymer, and (f) a photo sensitizer different from all components (a) through (e) in the non-aqueous metal catalytic composition, in an amount of at least 1 weight %. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A non-aqueous metal catalytic composition comprising:(a) a silver complex comprising reducible silver ions, in an amount of at least 2 weight %,(b) an organic phosphite in an amount of at least 2 weight %,(c) an oxyazinium salt silver ion photoreducing agent in an amount of at least 2 weight %,(d) a hindered pyridine in an amount of at least 5 weight %,(e) a photocurable component, non-curable polymer, or combination of a photocurable component and a non-curable polymer, and(f) a photosensitizer different from all components (a) through (e) in the non-aqueous metal catalytic composition, in an amount of at least 1 weight %,all amounts being based on the total amount of components (a) through (f) in the non-aqueous metal catalytic composition.2. The non-aqueous metal catalytic composition of claim 1 ,further comprising an inert organic solvent.4. The non-aqueous metal catalytic composition of claim 1 , wherein the organic phosphite is trimethyl phosphite claim 1 , triethyl phosphite claim 1 , tripropyl phosphite claim 1 , tributyl phosphite claim 1 , triisopropyl phosphite claim 1 ...

FORMING SILVER CATALYTIC SITES FROM SILVER PHOSPHITE CARBOXYLATES

A non-aqueous metal catalytic composition includes (a) a silver carboxylate-trialkyl(triaryl)phosphite complex comprising reducible silver ions in an amount of at least 2 weight %, (b) a silver ion photoreducing composition in an amount of at least 1 weight %, and (c) a photocurable component or a non-curable polymer or a combination of a photocurable component and a non-curable polymer. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A method for providing an article , comprising: (a) a silver carboxylate-trialkyl(triaryl)phosphite complex comprising reducible silver ions, in an amount of at least 2 weight %,', '(b) a silver ion photoreducing composition in an amount of at least 1 weight %, and', '(c) a photocurable component, non-curable polymer, or a combination of a photocurable component and a non-curable polymer,', 'all amounts being based on the total amount of components (a) through (c) in the non-aqueous metal catalytic composition,', 'to provide a precursor article comprising the metal catalytic layer or the metal catalytic pattern composed of the non-aqueous metal catalytic composition., 'providing a metal catalytic layer or a metal catalytic pattern composed of a non-aqueous metal catalytic composition on a substrate, the non-aqueous metal catalytic composition comprising2. The method of claim 1 , further comprising:photoreducing the reducible silver ions to silver particles in the metal catalytic layer or the metal catalytic pattern.3. The method of claim 2 , comprising:photoreducing the reducible silver ions to silver particles in the metal catalytic layer or metal catalytic pattern in the ...

METAL CATALYTIC COMPOSITION WITH SILVER CARBOXYLATE-TRIALKYL(TRIARYL)PHOSPHITE COMPLEX

A non-aqueous metal catalytic composition includes (a) a silver carboxylate-trialkyl(triaryl)phosphite complex comprising reducible silver ions in an amount of at least 2 weight %, (b) a silver ion photoreducing composition in an amount of at least 1 weight %, and (c) a photocurable component or a non-curable polymer or a combination of a photocurable component and a non-curable polymer. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A non-aqueous metal catalytic composition comprising:(a) a silver carboxylate-trialkyl(triaryl)phosphite complex comprising reducible silver ions, in an amount of at least 2 weight %,(b) a silver ion photoreducing composition in an amount of at least 1 weight %, and(c) a photocurable component, non-curable polymer, or a combination of a photocurable component and a non-curable polymer,all amounts being based on the total amount of components (a) through (c) in the non-aqueous metal catalytic composition.2. The non-aqueous metal catalytic composition of claim 1 , comprising an inert organic solvent.3. The non-aqueous metal catalytic composition of claim 1 , wherein the silver carboxylate-trialkyl(triaryl)phosphite complex is silver acetate-triethylphosphite complex claim 1 , silver acetate-tri-n-butylphosphite complex claim 1 , silver benzoate-triethylphosphite complex claim 1 , or silver acetate-triphenylphosphite complex.4. The non-aqueous metal catalytic composition of claim 1 , wherein the silver carboxylate-trialkyl(triaryl)phosphite complex is present in an amount of at least 2 weight % and up to and including 90 weight % claim 1 , based on the total amount of components (a) ...

METAL CATALYTIC COMPOSITION WITH SILVER-OXIME COMPLEX

A non-aqueous metal catalytic composition includes (a) a complex of silver and an oxime comprising reducible silver ions in an amount of at least 2 weight %, (b) a silver ion photoreducing composition in an amount of at least 1 weight %, and (c) a photocurable component, a non-curable polymer, or a combination of a photocurable component and a non-curable polymer. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A non-aqueous metal catalytic composition comprising:(a) a silver-oxime complex comprising reducible silver ions, in an amount of at least 2 weight %,(b) a silver ion photoreducing composition in an amount of at least 2 weight %, and(c) a photocurable component, a non-curable polymer, or a combination of a photocurable component and a non-curable polymer,all amounts being based on the total amount of components (a) through (c) in the non-aqueous metal catalytic composition.2. The non-aqueous metal catalytic composition of further comprising an inert organic solvent.3. The non-aqueous metal catalytic composition of claim 1 , wherein the silver-oxime is a silver α-benzoin complex.4. The non-aqueous metal catalytic composition of claim 1 , wherein the silver ion photoreducing composition comprises a free radical photoinitiator.6. The non-aqueous metal catalytic composition of claim 1 , wherein the silver-oxime complex is present in an amount of at least 1 weight % and up to and including 90 weight % claim 1 , based on the total amount of components (a) through (c).7. The non-aqueous metal catalytic composition of claim 1 , wherein the silver ion photoreducing composition is present in an amount of at least ...

FORMING CATALYTIC SITES FROM REDUCIBLE SILVER COMPLEXES

A non-aqueous metal catalytic composition includes (a) a silver complex comprising reducible silver ions, (b) an organic phosphite, (c) an oxyazinium salt silver ion photoreducing agent, (d) a hindered pyridine, (e) a photocurable component, a non-curable polymer, or combination of a photocurable component and a non-curable polymer, and (f) a photosensitizer different from all components (a) through (e) in the non-aqueous metal catalytic composition, in an amount of at least 1 weight %. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A method for providing an article , comprising: (a) a silver complex comprising reducible silver ions, in an amount of at least 2 weight %,', '(b) an organic phosphite in an amount of at least 2 weight %,', '(c) an oxyazinium salt silver ion photoreducing agent in an amount of at least 2 weight %,', '(d) a hindered pyridine in an amount of at least 5 weight %,', '(e) a photocurable component, non-curable polymer, or combination of a photocurable component and a non-curable polymer, and', '(f) a photosensitizer different from all components (a) through (e) in the non-aqueous metal catalytic composition, in an amount of at least 1 weight %,', 'all amounts being based on the total amount of components (a) through (f) in the non-aqueous metal catalytic composition,', 'to provide a precursor article comprising the metal catalytic layer or the metal catalytic pattern composed of the non-aqueous metal catalytic composition., 'providing a metal catalytic layer or a metal catalytic pattern composed of a non-aqueous metal catalytic composition on a substrate, the non-aqueous metal catalytic ...

FORMING CATALYTIC SITES FROM REDUCIBLE SILVER-HETEROCYCLIC COMPLEXES

A non-aqueous metal catalytic composition includes (a) a complex of silver and a hindered aromatic N-heterocycle comprising reducible silver ions in an amount of at least 2 weight %, (b) a silver ion photoreducing composition in an amount of at least 1 weight %, and (c) a photocurable component, a non-curable polymer, or a combination of a photocurable component and a non-curable polymer. This non-aqueous metal catalytic composition can be used to form silver metal particles in situ during suitable reducing conditions. The silver metal can be provided in a suitable layer or pattern on a substrate, which can then be subsequently subjected to electroless plating to form electrically-conductive layers or patterns for use in various articles or as touch screen displays in electronic devices. 1. A method for providing an article , comprising: (a) a complex of silver and a hindered aromatic N-heterocycle comprising reducible silver ions, in an amount of at least 2 weight %,', '(b) a silver ion photoreducing composition in an amount of at least 1 weight %, and', '(c) a photocurable component, a non-curable polymer, or a combination of a photocurable component and a non-curable polymer,', 'all amounts being based on the total amounts of components (a) through (c) in the non-aqueous metal catalytic composition,', 'to provide a precursor article comprising the metal catalytic layer or the metal catalytic pattern composed of the non-aqueous metal catalytic composition., 'providing a metal catalytic layer or a metal catalytic pattern composed of a non-aqueous metal catalytic composition on a substrate, the non-aqueous metal catalytic composition comprising2. The method of claim 1 , further comprising:photoreducing the reducible silver ions to silver particles in the metal catalytic layer or the metal catalytic pattern.3. The method of claim 2 , comprising:photoreducing the reducible silver ions to silver particles in the metal catalytic layer or metal catalytic pattern in the ...

Exhaust purification catalyst, exhaust emissin control device for internal combustion engine, and exhaust gas purification filter

Provided are an exhaust purification catalyst which purifies an exhaust gas discharged from an internal combustion engine and in which high catalytic activity at a low temperature and high durability at a high temperature are compatible with each other, and an exhaust emission control device for the internal combustion engine in which the exhaust purification catalyst is used. The exhaust purification catalyst is a catalyst in which a noble metal particle is carried on a surface of a silicon carbide particle. The catalyst is a noble-metal-carrying silicon carbide particle ( 1 ) in which a noble metal particle ( 3 ) is carried on a surface of a silicon carbide particle ( 2 ) in a state of being coated with an oxide layer ( 4 ).

PROCESS FOR PRODUCING A SUPPORTED SILVER CATALYST

Process for producing a supported silver catalyst, which comprises (a) reacting oxalic acid with an alkali metal base in a solvent, preferably water, to the second equivalence point of oxalic acid to give alkali metal oxalate; (b) reacting the alkali metal oxalate obtained according to (a) with silver salt in a solvent, preferably water, to give silver oxalate; (c) forming a complexation of the silver oxalate obtained according to (b) with a diamine compound in a solvent, preferably water, to give a diamine-silver oxalate complex. 118-. (canceled)19: A supported silver catalyst obtained or obtainable by a process which comprises(a) reacting oxalic acid with an alkali metal base in a solvent to the second equivalence point of oxalic acid to give alkali metal oxalate;(b) reacting the alkali metal oxalate obtained according to (a) with a silver salt in a solvent to give silver oxalate;(c) forming a complex of the silver oxalate obtained according to (b) with a diamine compound in a solvent to give a diamine-silver oxalate complex,(d) adding at least one promoter to the solution obtained according to (c) (e) providing a porous support material,(f) impregnating the porous support material with the solution obtained according to (c) or (d),(g) calcining the impregnated support material obtained according to (f).20. The supported silver catalyst according to having a silver content in the range from 5 to 30% by weight claim 19 , a lithium content in the range from 25 to 400 ppm by weight claim 19 , a cesium content in the range from 25 to 750 ppm by weight claim 19 , a tungsten content in the range from 5 to 500 ppm by weight claim 19 , a rhenium content in the range from 25 to 600 ppm by weight and a sulfur content in the range from 0 to 50 ppm by weight applied to the porous support material by impregnation claim 19 , in each case calculated as element and based on the total weight of the catalyst claim 19 , wherein the porous support material has a cylindrical geometry. ...