СПОСОБ ОБРАБОТКИ ВОЛОКНИСТОЙ МАССЫ

Настоящее изобретение относится к способу обработки волокнистой массы, включающему стадию, во время которой волокнистую массу обрабатывают дистиллированной перкарбоновой кислотой, например - дистиллированной перуксусной кислотой (dPAA), и пероксидом, например - пероксидом водорода. 14 з.п. ф-лы, 1 табл., 4 ил.

Patent RU2016122102A3

СПОСОБ ОТБЕЛИВАНИЯ ЛИГНОЦЕЛЛЮЛОЗОСОДЕРЖАЩЕЙ ПУЛЬПЫ

FIELD: pulp-and-paper industry. SUBSTANCE: pulp is treated with complexing agent at pH 3.5-11.0 and temperature 26-100 C. Delignification is effected by organic peracid or its salts at 50-140 C, while consumption of organic peracid and hydrogen peroxide added in delignification and bleaching stages constitutes less than 60% based on solid pulp weight. Washing is carried out at pH value equal to at least 4.0, after which pulp is bleached. EFFECT: enhanced efficiency of process. 10 cl, 9 tbl $9716 0с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 097 463. 13) С1 О 21 С 9/16, 9/10 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95113460/12, 26.05.1995 (30) Приоритет: 27.11.1992 ЗЕ 9203584-9 26.01.1993 ЗЕ 9300225-1 (46) Дата публикации: 27.11.1997 (56) Ссылки: 1. ЕР, патент, 0415149, кл. О 21 С 9/16, 1991. 2. ЕР, патент, 0402335, кл. О 21 С 9/10, 1990. 3. МО, заявка, 92/15752, кл. О 21 С 9/16, 1992. 4. ЦЗ, патент, 5091054, кл. О 21 СЭЛАТ, 1992. (86) Заявка РСТ: ЗЕ 93/01018 (25.11.93) (71) Заявитель: Ека Нобель Актиеболаг (3Е) (72) Изобретатель: Магнус Линстен[ЗЕ], Иири Баста[5Е], Анна-Софи Хелльстрем[5Е] (73) Патентообладатель: Ека Нобель Актиеболаг (Е) (54) СПОСОБ ОТБЕЛИВАНИЯ ЛИГНОЦЕЛЛЮЛОЗОСОДЕРЖАЩЕЙ ПУЛЬПЫ (57) Реферат: Использование: при отбеливании лигноцеллюлозосодержащей пульпы. Сущность изобретения: пульпу обрабатывают комплексообразующим агентом при РН 3,5 - 110 и температуре 26 - 100°С. Делигнифицируют органической перкислотой или ее солями при температуре 50 - 140°С и расходе органической — перкислоты по отношению к общему количеству перкислоты и перекиси водорода, добавляемому на стадиях делигнификации и отбеливания, менее 60% по массе сухой пульпы. Промывают при рН, равном, по меньшей мере, 4,0. Затем пульпу отбеливают. 9 з.п. ф-лы, 9 табл. 2097463 С1 КО $9716 0с ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ (19) ВИ “"” 2097 463 ^ Сл (51) С° т) 24 © 9/16, 9/10 12) АВЗТКАСТ ОЕ 1МУЕМТОМ (21), (22) ...

ФЕРМЕНТЫ, ПРИГОДНЫЕ ДЛЯ ПОЛУЧЕНИЯ ПЕРКИСЛОТ

1. Способ получения пероксикарбоновой кислоты, включающий:(a) обеспечение набора компонентов реакции, содержащего:(1) по меньшей мере один субстрат, выбранный из группы, состоящей из:(i) одного или нескольких сложных эфиров, имеющих структуру[X]R,где X - сложноэфирная группа формулы R-C(O)O;R- линейный, разветвленный или циклический гидрокарбильный C1-C7-фрагмент, необязательно замещенный гидроксильными группами или C1-C4-алкоксигруппами, где Rнеобязательно содержит одну или несколько простых эфирных связей в случае R= C2-C7;R- линейный, разветвленный или циклический гидрокарбильный C1-C6-фрагмент, или пятичленный циклический гетероароматический фрагмент, или шестичленный циклический ароматический или гетероароматический фрагмент, необязательно замещенный гидроксильными группами; где каждый атом углерода в Rв отдельности соединен не более чем с одной гидроксильной группой или не более чем с одной сложноэфирной группой или группой карбоновой кислоты; где Rнеобязательно содержит одну или несколько простых эфирных связей;m - целое число, варьирующее в диапазоне от 1 до числа атомов углерода в R; и где указанные сложные эфиры имеют растворимость в воде, составляющую по меньшей мере 5 ч/млн при 25°C;(ii) одного или нескольких глицеридов, имеющих структуру,где R- неразветвленный или разветвленный C1-C21-алкил, необязательно замещенный гидроксильной или C1-C4-алкоксигруппой, а Rи Rв отдельности представляют собой H или RC(O);(iii) одного или нескольких сложных эфиров формулы:,где R- неразветвленный или разветвленный C1-C7-алкил, необязательно замещенный гидроксильной или C1-C4-алкоксигруппой, а R- неразветвленный или разветвленный С1-С10-алкил, алкенил, алкинил, арил, алкиларил, алкилгетероарил, гетероарил, (CHCHO)или (CHCH(CH)-O)H, и n РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК C12P 7/40 (11) (13) 2014 143 791 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014143791, 13.03.2013 (71) Заявитель(и): Е.И.ДЮПОН ДЕ НЕМУР ...

BLEICHEN UND DELIGNIFIZIERUNG VON ZELLSTOFF DURCH CAROATE/CAROSCHE SÄURE UND HERSTELLUNG DERSELBEN

PROCEDURE FOR DELIGRIFIZIERUNG OF LIGNOCELLULOSEHALTIGEM CELLULOSE

PROCEDURE FOR BLEACHING AND FOR THE DELIGNIFYING OF CHEMICAL PAPIERZELLSTOFFEN.

PROCEDURE FOR THE DELIGNIFYING OF CHEMICAL CELLULOSES

Improved ozone/peracid process for delignifying a lignocellulosic material

Bleaching of chemical pulp with peracid

ENZYMES USEFUL FOR PERACID PRODUCTION

Acetyl xylan esterases and variants thereof having perhydrolytic activity are provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. Multi-component peracid generation systems comprising an enzyme catalyst having perhydrolytic activity are also provided, as are methods of using the present enzyme catalyst to produce peroxycarboxylic acids. The polypeptide having perhydrolytic activity may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, paper pulp processing, and personal care applications.

PROCESS FOR THE BLEACHING OF CHEMICAL PULP

Procédé pour le blanchiment d'une pâte à papier chimique Procédé pour le blanchiment d'une pâte à papier chimique au moyen d'une séquence d'étapes de traitement impliquant au moins une étape avec une enzyme et au moins une étape avec un peroxyacide. Pas de figure.

PROCESS FOR THE DELIGNIFICATION OF A CHEMICAL PULP

Procédé pour la délignification d'une pâte à papier chimique au moyen d'une séquence d'étapes de traitment exempte de réactifs chlorés comportant, dans l'ordre, une étape de traitment à l'oxygène, une étape de traitment décontaminant de la pâte en ses ions métalliques, une étape au péroxyde d'hydrogène alcalin et une étape avec un péroxyacide.

METHOD OF PRODUCING PULP USING SINGLE-STAGE COOKING WITH FORMIC ACID AND WASHING WITH PERFORMIC ACID

The invention relates to a method of producing pulp with a high brightness using single-stage cooking with formic acid, washing with performic acid and bleaching with oxidizing bleaching chemicals. In performic acid washing, the rapid formation and rapid reactions of performic acid (HCOOOH) are utilized for modification of residual lignin. The method of the invention provides an ISO brightness exceeding 90 % without chlorine chemicals. The method can be applied to both herbaceous plants and wood.

Verfahren zum Bleichen von Stroh und ähnlichen Rohstoffen sowie Waren daraus.

ОТБЕЛИВАЮЩАЯ СИСТЕМА, ПОКРЫТАЯ ПОЛИМЕРНЫМ СЛОЕМ, СПОСОБ ЕЕ ПОЛУЧЕНИЯ, ПРИМЕНЕНИЯ И КОМПОЗИЦИЯ СРЕДСТВА ДЛЯ ЧИСТКИ

Данное изобретение касается отбеливающей системы, которая содержит как минимум один компонент, выбранный из группы, которая включает отбеливатель, активатор отбеливания или катализатор отбеливания, причем отбеливающая система покрыта как минимум одним слоем полимера, а полимер содержит уретановые и карбамидные группы. Отбеливающая система, согласно изобретению, а также композиции средств для чистки, которая содержит отбеливающую систему, являются пригодными, например, для мытья или чистки текстильных изделий или посуды.

PROCEEDED OF DELIGNIFICATION TO the OXYGEN Of a PASTE PAPER HAS

PROCEEDED FOR THE DELIGNIFICATION AND THE BLEACHING OF PASTE PAPER CHEMICAL OR SEMI-CHIMIQUE OF BAGASSE HAS

PROCEDURE TO ULTRAWHITEN GRAZES OF WOOD QUI- SEMI-CHEMICAL MICA OR.

Elimination of fluorescent agents contained in old papers by peracetic acid

Utilisation de l'acide peracétique pour réduire ou/ et éliminer la fluorescence des fibres cellulosiques par destruction des agents de fluorescence qui en sont la cause.

PERHYDROLASE VARIANT PROVIDING IMPROVED SPECIFIC ACTIVITY

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

СПОСОБ ПОЛУЧЕНИЯ МЕХАНИЧЕСКОЙ ДРЕВЕСНОЙ МАССЫ, ПРИГОДНОЙ ДЛЯ ИЗГОТОВЛЕНИЯ БУМАГИ ИЛИ КАРТОНА

... 1. Способ производства механической или химико-механической древесной массы, применяемой в качестве исходного материала для бумаги или картона, согласно которому: ! древесную массу подвергают фибриллированию с использованием известных способов, при этом исходным материалом является древесная щепа или древесина, и ! фибриллированную древесную массу отбеливают в щелочной среде; ! при этом указанный способ отличается тем, что после фибриллирования древесную массу просеивают для отделения отходов от приемлемого материала, в качестве отходов отделяют максимум 60% от общего количества древесной массы, отходы отбеливают отдельно от приемлемого материала, после чего отбеленные отходы смешивают с приемлемым материалом. ! 2. Способ по п.1, отличающийся тем, что отходы подвергают размолу перед смешением с приемлемым материалом, который образует основную часть древесной массы. ! 3. Способ по п.1, отличающийся тем, что отходы подвергают размолу перед отбеливанием. ! 4. Способ по пп.1-3, отличающийся ...

PROCEDURE FOR THE DELIGNIFYING OF CHEMICAL CELLULOSES

PROCEDURE FOR THE CELLULOSE PRODUCTION BY SINGLE-STEP COOKING WITH AMEISENSAÜRE AND LAUNDRY WITH PERAMEISENSAÜRE

BLEACHING AND DELIGNIFYING CELLULOSE BY CAROATE/CARO ACID AND PRODUCTION THE SAME

ACTIVATOR FOR CELLULOSE BLEACHING

PROCEDURE FOR THE IMPROVEMENT OF THE OPACITY OF MECHANICAL PULPE BY THE USE OF ALIPHATIC PEROXYSÄUREN AND USE FROM PEROXYSÄUREN TO THE IMPROVEMENT OF THE OPACITY

Improved process and composition for delignifying a lignocellulosic material

Bleaching and delignification of pulp

Process for bleaching a chemical paper pulp

Improved ozone/peracid process for delignifying a lignocellulosic material

Method for bleaching cellulose in a closed system using caro's acid

Bleaching of lignocellulosic pulp with ozone and peracid

Method for delignifying and bleaching pulp

Method for delignifying and bleaching pulp, comprising a first bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture, followed by a second bleaching stage using hydrogen peroxide in an alkaline aqueous mixture, and followed by a third bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture.

BLEACHING OF LIGNOCELLULOSIC MATERIAL WITH ACTIVATED OXYGEN

A chemical pulp that contains reactants able to generate a dioxirane within the pulp. The reactants comprise of carbonyl compound, preferably a ketone, and oxygen donor in proportions suitable to produce a dioxirane having a molecular diameter of less than 140 angstrom units. A process of bleaching a chemical pulp is also described. The process comprises mixing the pulp with the reactants able to generate a dioxirane within the pulp.

СПОСОБ ОТБЕЛИВАНИЯ ЦЕЛЛЮЛОЗЫ ДЛЯ ПРОИЗВОДСТВА БУМАГИ

... 1. Способ отбеливания сырьевой целлюлозы для производства бумаги органическими перкислотами, отличающийся тем, что его осуществляют двумя стадиями при атмосферном давлении и при температуре, составляющей менее или равной 100°C, при этом первую стадию выполняют посредством приведения сырьевой целлюлозы в контакт со смесью перуксусной кислоты и пермуравьиной кислоты так, чтобы в полученной смеси содержание воды составляло по весу менее или было равно 15%; вторую стадию выполняют посредством обработки полученной отбеленной массы после механического отделения реакционной среды, полученной в конце первой стадии, раствором едкого натра и перекиси водорода. 2. Способ по п.1, отличающийся тем, что перуксусную кислоту и пермуравьиную кислоту получают путем приведения смеси из уксусной кислоты и муравьиной кислоты в контакт с перекисью водорода, имеющей концентрацию по весу более 50%. 3. Способ по п.1 или 2, отличающийся тем, что отношение уксусная кислота + перуксусная кислота/муравьиная кислота ...

PROCEDE POUR LA DELIGNIFICATION ET LE BLANCHIMENT DE PATE A PAPIER CHIMIQUE OU SEMI-CHIMIQUE DE BAGASSE

LE PROCEDE CONSISTE A SOUMETTRE LA PATE CHIMIQUE OU SEMI-CHIMIQUE DE BAGASSE A UN TRAITEMENT PREALABLE AU MOYEN D'UN ACIDE PERSULFURIQUE OU D'UN SEL DE CET ACIDE.

method for producing pulp [...], whose flesh is suitable for making paper or cardboard

Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof

A process for the delignification and bleaching lignocellulosic-containing pulp, in which the pulp is delignified with an organic peracid or salts thereof, treated with a complexing agent, washed and subsequently bleached with a chlorine-free peroxide containing bleaching.

METHODS OF MICROBIAL CONTROL

In some embodiments, a method may include reducing the microbial load in contaminated water of water recycle loops. These water recycling loops may include pulp and paper mills, cooling towers and water loops, evaporation ponds, feedstock processing systems and/or non-potable water systems. The methods may include providing a peracetate oxidant solution. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate solution may provide bleaching, sanitizing and/or disinfection of contaminated water and surfaces. The peracetate oxidant solution may provide enhanced separation of microbes from contaminated water. 1. A method of reducing a microbial load in contaminated water , comprising:contacting contaminated water containing a population of microbes with a peracetate oxidant solution; andmixing said contaminated water with the peracetate oxidant solution.2. The method of claim 1 , further comprising separating the water peracetate oxidant solution mixture into at least microbes and a water phase.3. The method of claim 1 , further comprising heating the contaminated water to within a temperature range from between about 38° C. to about 95° C.4. The method of claim 2 , wherein the contaminated water comprises impurities claim 2 , and wherein separating the microbes and water phase comprises separating the microbe and water phase into at least microbes claim 2 , impurities claim 2 , and water.5. The method of claim 1 , wherein the peracetate oxidant solution comprises peracetate anions and a peracid claim 1 , wherein the peracetate oxidant solution has a pH from about 7 to about pH 12 claim 1 , ...

ОТБЕЛИВАЮЩИЕ СИСТЕМЫ В ПОЛИМЕРНОЙ ОБОЛОЧКЕ

FIELD: chemistry. SUBSTANCE: invention relates to a bleaching system for household textile items containing at least one bleaching agent, where the bleaching system is selected from peroxybenzoic acid, peroxy-6-naphthoic acid, peroxylauric acid, peroxystearic acid, phthalimido peroxycaproic acid, 6-phthalimido peroxyhexanoic acid, nonylimido peroxyamber acid, nonylimido peroxyadipic acid, 1,12-diperoxydodecanoic acid, 1,9-diperoxyazelaic acid, diperoxyisophthalic acid and 2-decyldiperoxybutane-1,4-diacid and coated by a shell in form of a layer of a polymer with urethane and urea groups, where a prepolymer with terminal NCO groups is obtained from macrools, ionic or potentially ionic polyols and polyisocyanates used in excess, said prepolymer being subjected to reaction with compounds which contain at least two amine groups which are reactive towards isocyanate with ratio of NCO groups to NH groups less than or equal to 1:1, after which said polymer is obtained via neutralisation. EFFECT: obtaining a novel bleaching system. 11 cl, 2 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 429 288 (13) C2 (51) МПК C11D C11D 7/54 (2006.01) 3/395 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2008143186/04, 03.04.2007 (24) Дата начала отсчета срока действия патента: 03.04.2007 (73) Патентообладатель(и): БАСФ СЕ (DE) R U Приоритет(ы): (30) Конвенционный приоритет: 04.04.2006 EP 06112200.8 (72) Автор(ы): ДИЧЕ Франк (DE), ХЭБЕРЛЕ Карл (DE), РАН Ральф-Томас (DE), ХЭРИНГ Дитмар (DE) (43) Дата публикации заявки: 10.05.2010 Бюл. № 13 2 4 2 9 2 8 8 2 4 2 9 2 8 8 R U (56) Список документов, цитированных в отчете о поиске: WO 0209862 А, 07.02.2002. ЕР 1188820 A1, 20.03.2002. EP 1264812 A, 11.12.2002. RU 2193049 C2, 20.01.2001. RU 2002129804 A, 10.05.2004. Номенклатура ферментов. Рекомендации международного биохимического союза по номенклатуре и классификации ферментов, а также по единицам ферментов и ...

Patent RU2018145688A3

СПОСОБ ДЕЛИГНИФИКАЦИИ И ОТБЕЛКИ ЦЕЛЛЮЛОЗЫ

А 2016122102 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) (11) хх < << < < << Х & (13) ЗОО 3 6 А (50) МПК 021С 300 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016122102, 15.10.2014 (71) Заявитель(и): ЭВОНИК ДЕГУССА ГМБХ (ОЕ) Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): 06.11.2013 РЕ 102013222468.0 ДИТЦ Томас (ОЕ), (43) Дата публикации заявки: 11.12.2017 Бюл. № 35 Е ПРИММЕР РЕ) (85) Дата начала рассмотрения заявки РСТ на ВЕГМАНН Зигрид (ОЕ), национальной фазе: 06.06.2016 ИЛЛЬХАРЛТ Верена (ОЕ) (86) Заявка РСТ: ЕР 2014/072096 (15.10.2014) (87) Публикация заявки РСТ: УГО 2015/0674.46 (14.05.2015) Адрес для переписки: 105082, Москва, Спартаковский пер., 2, стр. 1, секция 1, этаж 3, ЕВРОМАРКПАТ (54) СПОСОБ ДЕЛИГНИФИКАЦИИ И ОТБЕЛКИ ЦЕЛЛЮЛОЗЫ (57) Формула изобретения 1. Способ делигнификации и отбелки целлюлозы, заключающийся в том, что а) выполняют первую ступень отбелки пероксидом водорода в присутствии молибдата или вольфрамата в кислой водной смеси, 6) выполняют следующую за первой ступенью отбелки вторую ступень отбелки пероксидом водорода в щелочной водной смеси и в) выполняют следующую за второй ступенью отбелки третью ступень отбелки пероксидом водорода в присутствии молибдата или вольфрамата в кислой водной смеси. 2. Способ по п. 1, отличающийся тем, что на первой и третьей ступенях отбелки целлюлозу подвергают при температуре в пределах от 50 до 150°С и при значении рН в пределах от 1 до 7 взаимодействию с пероксидом водорода в количестве от 0,1 до 5% мас. в присутствии молибдена в количестве от 10 до 2000 част./млн, который используют в виде молибдата, или в присутствии вольфрама в количестве от 200 до 10000 част./млн, который используют в виде вольфрамата, в каждом случае в пересчете на массу сухой целлюлозы, а на второй ступени отбелки целлюлозу подвергают при температуре в пределах от 50 до 100°С и при значении РН в пределах от 7 до 12 взаимодействию с пероксидом водорода в количестве от 0,1 до 5% ...

Peroxyacid delivery process

BLEACH FROM CELLULOSE OF MEANS PERSÄURE

PROCEDURE FOR THE PRODUCTION PERSÄURE ABSTENTIONS OF AN OXIDIZING DISSOLUTION AND PROCEDURE FOR TREATING SUBSTRATES WITH IT

A novel post-treatment to enhance the enzymatic hydrolysis of pretreated lignocellulosic biomass

The present disclosure relates to a process for extracting sugars from a pretreated lignocellulosic biomass. This process consists of contacting the pretreated lignocellulosic biomass with low charges of an aqueous peroxy acid (PA) solution to produce a liquid fraction (containing a small amount of lignin and hemicellulose degradation products) and a solid fraction containing cellulose, hemicellulose and lignin. The solid fraction can then be subjected to enzymatic hydrolysis with a variety of cell wall-degrading enzymes to produce a lignin-rich residue and a sugar solution that can be fermented to a variety of (bio)chemicals.

Process for the delignification of a chemical paper pulp

Process for the delignification of a chemical paper pulp

METHODS OF PULP FIBER TREATMENT

In some embodiments, a method may include treating pulp in pulp and paper mills. The methods may include providing a peracetate oxidant solution and generating a reactive oxygen species. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate oxidant solution may provide enhanced treatment methods of bleaching, brightening, and delignifying pulp fibers involving the use of peracetate oxidant solutions.

ACTIVATOR FOR PULP BLEACHING

PROCESS FOR PRODUCING MECHANICAL PULP SUITABLE FOR PAPER OR CARDBOARD MAKING

Method for the production of mechanical or chemi-mechanical pulp as raw material for paper or cardboard. According to this method, the pulp is fibrillated and the fibrillated pulp is bleached in alkaline conditions. According to the present invention, the pulp is screened to separate the reject from the accept, at maximum approximately 60 % of the total amount of pulp is separated as the reject, the reject is bleached separate from the accept, and, after that, the bleached reject is remixed with the accept. When operating according to the present invention, the strength of the pulp increases and the energy used for refining is reduced, which is seen both in the refining of the reject and in the post-refining of the final mechanical pulp.

BLEACH SYSTEMS ENVELOPED WITH POLYMER LAYERS

The invention relates to a bleach system comprising at least one component selected from bleach, bleach activator and bleach catalyst, characterized in that the bleach system has been enveloped by at least one polymeric layer and the polymer has urethane and urea groups. The inventive bleach system and detergent formulations comprising this bleach system are suitable, for example, for washing or cleaning textiles or dishware.

PROCESS FOR BLEACHING AND DELIGNIFYING CHEMICAL PAPER PULP

2110698 9221814 PCTABS00160 Procédé pour le blanchiment et la délignification d'une pâte à papier chimique consistant à soumettre la pâte à un traitement en trois étapes comprenant une première étape au moyen d'oxygène gazeux suivie par deux étapes avec, respectivement et dans un ordre indifférent, de l'ozone gazeux et de l'acide peroxymonosulfurique ou l'un de ses sels.

METHOD FOR CHLORINE-FREE BLEACHING OF PULP WITH ACETIC ACID AS ACIDIFYING AGENT

A method of bleaching pulp of cellulosic fibre material without the use of chlorine when manufacturing chemical pulp is described, wherein the pulp entering is fed continuously in a bleaching line and is treated with a sequestering agent in the presence of an acid in order to adjust the pH to a value below 7 and is thereafter bleached in a sequence of several stages consisting of peroxide, at least one organic per-acid and peroxide. According to the invention it is suggested that in the treatment with the sequestering agent the pulp is acidified with acetic acid.

PROCESS FOR DELIGNIFICATION OF LIGNOCELLULOSE-CONTAINING PULP

The present invention relates to a process for delignifying and bleaching lignocellulose-containing pulp; in which the pulp is delignified kith a peracid or a salt thereof, treated with a complexing agent, and subsequently bleached with a chlorine-free bleaching agent. Suitably, delignification is carried out with the strongly oxidising peracetic acid, giving a considerable increase in brightness and a considerable reduction of the kappa number after bleaching with a chlorine-free bleaching agent comprising at least one of a peroxide-containing compound, ozone or sodium dithionite, or optional sequences or mixtures thereof. The brightness-increasing effect is highly selective, i.e: the viscosity of the pulp is maintained to a comparatively great extent. Both the delignification and the treatment with a complexing agent are advantageously carried out at a close to neutral pH, thus minimising the need of pH adjustment and making it possible to use spent bleach liquor internally, e.g: for washing the pulp. By final bleaching with ozone and hydrogen peroxide, it is possible with the inventive process to produce softwood pulps having a brightness exceeding 90 % ISO, and to remove practically all lignin in the pulp while maintaining sufficient pulp strength.

PROCESS FOR THE DELIGNIFICATION AND/OR BLEACHING OF A PAPER PULP

Process for the improvement in the selectivity of the delignification and/or bleaching of a preferably chemical paper pulp by means of a peroxyacid, according to which the pulp is treated with an aqueous solution of this organic peroxyacid in the presence of at least one ancillary agent for viscosity protection, selected from inorganic acids of phosphorus and their alkali metal salts, preferably pyrophosphoric acid, sodium pyrophosphates and their ammonium salts.

METHOD FOR PREVENTING ACCUMULATION OF METALS IN A CLOSED PULP BLEACHING PROCESS

A method at the bleaching of pulp, comprising bleaching with peracetic acid where the pH value during the bleaching reaction is held within 5-7. In the final phase of the bleaching with peracetic acid, metals released in the pulp are rebound to the fibers in the pulp by increasing the pH value to at least 9, whereafter the pulp is washed. The pH value is increased preferably 1-10 minutes before the washing. It is thereby possible to close the bleaching process in counterflow without risk of accumulation of the metals in the process.

BLEACHING OF CELLULOSIC PULP WITH OZONE AND PERACID

The invention concerns a method for the production of pulp. According to this method, pulp is treated with ozone in at least one bleaching stage. In accordance with the invention, ozone-treated pulp is brought into contact with a peroxy alkanoic acid under acid conditions in order to reduce the pulp's alkali lability, and the resulting pulp is subjected to an alkaline extraction stage or peroxide bleaching stage. The bleaching sequences are thus of teh type Z/Paa/E or Z/Paa/P, for example. The pulp produced according to the invention has a kappa number of less than 2, a viscosity of more than 600 ml/g, a tear index (T70) of over 13 mN.m2/g and a zero-span tensile index (T70) as measured from a wet sheet of over 100 N.m/g.

METHOD FOR BLEACHING A CHEMICAL PULP AND APPLICATION OF SUCH METHOD TO THE BLEACHING OF A KRAFT PULP

Polpa quimica, e, processo de branqueamento de polpa quimica.

PROCESS FOR THE BLEACHING OF CHEMICAL PULP

The invention relates to a process for the bleaching of chemical pulp, in which process the pulp is delignified with a peracid and additionally the pulp is chelated in order to bind heavy metals, such as Fe, Mn and/or Cu, into a chelate complex. According to the invention, the chelating is carried out using a chemical which has been selected from a group consisting of N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-amine, N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-aspartic acid and N-tris-((1,2-dicarboxy-ethoxy)-ethyl)-amine, as well as the alkali metal and earth-alkali metal salts thereof, and the peracid and chelating treatments are carried out simultaneously by combining the peracid and the said chelating chemical in the same solution phase. In the bleaching sequence the treatment according to the invention may follow, for example, an ozone delignification and precede an alkaline peroxide step, and in the latter case a magnesium compound, such as MgSO4, may be added to the pulp before the alkali step ...

ПОЛУЧЕНИЕ ПЕРКИСЛОТ И КОМПОЗИЦИИ С ИСПОЛЬЗОВАНИЕМ ФЕРМЕНТА, ОБЛАДАЮЩЕГО ПЕРГИДРОЛИТИЧЕСКОЙ АКТИВНОСТЬЮ

FIELD: biotechnology.SUBSTANCE: method for peroxycarboxylic acid production comprises reacting carboxylic acid esters and inorganic peroxide in the presence of a polypeptide having perhydrolytic activity and having the amino acid sequence of SEQ ID NO:12, provided that the amino acid residue linked to the C-terminal portion of the catalytic histidine, is not glutamic acid. Also, the said polypeptide is used to create a system for formation and delivery of peroxycarboxylic acid, composition having antimicrobial activity, compositions for care of clothes and personal care products.EFFECT: improved perhydrolytic activity.16 cl, 2 dwg, 12 tbl, 18 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 636 466 C2 (51) МПК C12P 7/40 (2006.01) C12N 9/18 (2006.01) A61L 2/16 (2006.01) D21C 9/16 (2006.01) C11D 3/386 (2006.01) A61K 8/64 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА A61Q 5/02 (2006.01) ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ A61Q 11/00 (2006.01) A61Q 19/02 (2006.01) (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2014143791, 13.03.2013 (24) Дата начала отсчета срока действия патента: 13.03.2013 (72) Автор(ы): ПЭЙН Марк Скотт (US), ДИКОСИМО Роберт (US) 23.11.2017 Приоритет(ы): (30) Конвенционный приоритет: R U (73) Патентообладатель(и): Е.И.ДЮПОН ДЕ НЕМУР ЭНД КОМПАНИ (US) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: WO 2011119706 A1, 29.09.2011. (43) Дата публикации заявки: 27.05.2016 Бюл. № 15 DATABASE UniProt [Online]. Accession no. Q8E2E7, 01.03.2003. WO 2010039958 A1, 08.04.2010. RU 2009121821 A, 20.12.2010. (45) Опубликовано: 23.11.2017 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.10.2014 (86) Заявка PCT: US 2013/030760 (13.03.2013) 2 6 3 6 4 6 6 30.03.2012 US 61/618,383 2 6 3 6 4 6 6 R U WO 2013/148184 (03.10.2013) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) ПОЛУЧЕНИЕ ПЕРКИСЛОТ И КОМПОЗИЦИИ С ИСПОЛЬЗОВАНИЕМ ФЕРМЕНТА, ОБЛАДАЮЩЕГО ПЕРГИДРОЛИТИЧЕСКОЙ ...

СПОСОБ ДЕЛИГНИФИКАЦИИ И ОТБЕЛИВАНИЯ ЛИГНОЦЕЛЛЮЛОЗОСОДЕРЖАЩЕЙ ПУЛЬПЫ

FIELD: pulp-and-paper industry. SUBSTANCE: lignocellulose- containing pulp is delignificated by a peracid or its salt, treated with complexing agent and then bleached with chlorine-free bleaching agent. may be performed with strongly oxidizing peracetic acid, whereas chlorine-free bleaching agent includes at least one peroxide- containing compound, ozone or sodium dithionite, or their mixtures. Delignification and treatment with complexing agent should be advantageously carried out at pH value close to neutral. Final bleaching may be effected by ozone and hydrogen peroxide. EFFECT: enhanced efficiency of process. 11 cl, 5 tbl сС97У16 0с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 097 462 ' 13) С1 О 21 С 9/00, 9/10, 9/16 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95114367/12, 26.05.1995 (30) Приоритет: 27.11.1992 ЗЕ 9203585-6 (46) Дата публикации: 27.11.1997 (56) Ссылки: 1. ЕР, патент, 0402335, кл. О 21 С 9/10, 1990. 2. ЕР, патент, 0480469, кл. О 21 С 9/1 47, 1992. 3. Ц$, патент, 5091054, кл. О 21 С 9/147, 1992. (86) Заявка РСТ: ЗЕ 9301019 (25.11.93) (71) Заявитель: Ека Нобель Актиеболаг (3Е) (72) Изобретатель: Магнус Линстен[ЗЕ], Иири Баста[5Е], Анна-Софи Хелльстрем[5Е] (73) Патентообладатель: Ека Нобель Актиеболаг (Е) (54) СПОСОБ ДЕЛИГНИФИКАЦИИ И ОТБЕЛИВАНИЯ ЛИГНОЦЕЛЛЮЛОЗОСОДЕРЖАЩЕЙ ПУЛЬПЫ (57) Реферат: Использование: в целлюлозно-бумажной промышленности, при делигнификации и отбеливании лигноцеллюлозосодержащей пульпы. Сущность изобретения: лигноцеллюлозосодержащую пульпу делигнифицируют перкислотой или ее солью. Обрабатывают комплексообразующим агентом и затем отбеливают отбеливателем, не содержащим хлор. Делигнификацию возможно осуществлять сильно окисляющей перуксусной кислотой. После отбеливания отбеливателем, не содержащим хлора и включающим по крайней мере одно из пероксидсодержащих соединений, озон или дитионит натрия, или по выбору их последовательности или смеси, делигнификацию и обработку ...

Bleichen von lignocellulosischen Materialien mit aktiviertem Sauerstoff.

PROCEDURE FOR BLEACHING CELLULOSE

PROCEDURE FOR BLEACHING LIGNOCELLULOSE ONES CONTAINING CELLULOSE

PROCEDURE FOR THE IMPROVEMENT OF THE SELECTIVITY WITH THE DELIGNIFYING OF CHEMICAL CELLULOSE

OXIDISING AGENT

PROCEDURE FOR BLEACHING CELLULOSE

Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent

Method of treating chemical paper pulp without using chlorine-containing chemicals

RECYCLED FIBRE BLEACHING

Process for bleaching of lignocellulose-containing pulp

METHOD FOR BLEACHING PAPER PULP

The invention concerns a method for bleaching different types of paper pulp in two steps at atmospheric pressure and at a temperature not higher than 100 ·C. The first step consists in contacting the unbleached paste with a mixture of paracetic acid and performic acid. The second step consists in treating the bleached pulp derived from the first step, with a solution of soda and hydrogen peroxide. The resulting pulps exhibit a high index of whiteness and a degree of polymerisation close to unbleached pulps. The method is environmentally safe and non-polluting.

METHOD FOR BLEACHING LIGNOCELLULOSE-CONTAINING FIBRES

In an improved method for bleaching recycled fibres by means of hydrogen peroxide, bleaching is performed in the presence of ozone or a peracid or salts thereof. While using existing apparatus and control equipment, the inventive method enables more efficient utilisation of the bleaching capacity of hydrogen peroxide than known methods. Recycled fibres can thus be bleached to a much higher degree of brightness without increasing the amount of hydrogen peroxide, or be bleached to the same degree of brightness with a reduced amount of hydrogen peroxide.

IMPROVED OZONE/PERACID PROCESS FOR DELIGNIFYING A LIGNOCELLULOSIC MATERIAL

A process for delignifying a lignocellulosic material comprising exposing the material to a mixture of peracid and ozone. Preferred peracids include Caro's acid and peracetic acid. Also disclosed is a kraft pulp delignification mixture comprising in combination (a) water, (b) a kraft pulp at 1-40 % consistency; (c) a peracid; and (d) from 0.1 to 5.0 % ozone on pulp.

METHOD FOR OXYGEN DELIGNIFICATION OF PAPER PULP

The invention features a method for oxygen delignification of paper pulp. This method comprises an activation pretreatment step using an organic peroxyacid such as paracetic acid before the oxygen delignification step or between two oxygen delignification stages. A level of delignification of about 70 to 75 % is obtained compared with about 50 % using the method of oxygen delignification with the usual pretreatment steps.

PROCESS FOR THE BLEACHING OF CHEMICAL PULP

The invention relates to a process for the bleaching of chemical pulp, in which process the pulp is delignified with a peracid and additionally the pulp is chelated in order to bind heavy metals, such as Fe, Mn and/or Cu, into a chelate complex. According to the invention, the chelating is carried out using a chemical which has been selected from a group consisting of N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-amine, N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-aspartic acid and N-tris-((1,2-dicarboxy-ethoxy)-ethyl)-amine, as well as the alkali metal and earth-alkali metal salts thereof, and the peracid and chelating treatments are carried out simultaneously by combining the peracid and the said chelating chemical in the same solution phase. In the bleaching sequence the treatment according to the invention may follow, for example, an ozone delignification and precede an alkaline peroxide step, and in the latter case a magnesium compound, such as MgSO4, may be added to the pulp before the alkali step.

Process for producing mechanical pulp suitable for paper or cardboard making

PROCEEDED OF BLEACHING OF PASTES PAPER IN ORGANIC MEDIUM HAS HYDRATION CONTROLEE

Différents types de pâtes à papier sont blanchis en deux étapes à la pression atmosphérique et à une température inférieure ou égale à 100°C. La première étape procède par une mise en contact de la pâte écrue avec un mélange d'acide peracétique et d'acide performique. La deuxième étape procède par un traitement de la pâte blanchie issue de la première étape, par une solution de soude et d'eau oxygénée. Les pâtes obtenues ont un haut indice de blancheur et un degré de polymérisation proche des pâtes écrues. Le procédé est écologique et non-polluant.

PROCEEDED OF BLEACHING OF PASTES PAPER IN ORGANIC MEDIUM HAS HYDRATATIONCONTROLEE

PROCESS OF DESTRUCTION OF the FLUORESCENT AGENTS CONTAINED IN the VIEUXPAPIERS BY the PERACETIC ACID

Process for the delignification and bleaching pulp containing lignocellulose

METHOD FOR BLEACHING A CHEMICAL PULP.

Procédé pour le blanchiment d'une pâte à papier chimique au moyen d'une séquence d'étapes de traitement impliquant au moins une étape avec enzyme et au moins une étape avec un peroxyacide.

PROCESS FOR PRODUCING MECHANICAL PULP SUITABLE FOR PAPER OR CARDBOARD MAKING

Method for the production of mechanical or chemi-mechanical pulp as raw material for paper or cardboard. According to this method, the pulp is fibrillated and the fibrillated pulp is bleached in alkaline conditions. According to the present invention, the pulp is screened to separate the reject from the accept, at maximum approximately 60 % of the total amount of pulp is separated as the reject, the reject is bleached separate from the accept, and, after that, the bleached reject is remixed with the accept. When operating according to the present invention, the strength of the pulp increases and the energy used for refining is reduced, which is seen both in the refining of the reject and in the post-refining of the final mechanical pulp.

METHOD FOR BLEACHING FIBER MATERIAL

The invention relates to a method for bleaching a material that comprises fibres made of a cellulose-containing raw material, in which method the fibres are treated with a bleaching solution that contains a peracid.

СПОСОБ ОБРАБОТКИ ВОЛОКНИСТОЙ МАССЫ

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 145 688 A (51) МПК D21C 9/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018145688, 27.06.2017 (71) Заявитель(и): КЕМИРА ОЙЙ (FI) Приоритет(ы): (30) Конвенционный приоритет: 01.07.2016 FI 20165548 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 01.02.2019 R U (43) Дата публикации заявки: 03.08.2020 Бюл. № 22 (72) Автор(ы): РОБЕРТСЕН, Лейф (FI), ВУОРЕНПАЛО, Вели-Матти (FI), ПЕРАНДЕР, Анна-Майя (FI), ПЕКОНЕН, Пентти (FI), КОНН, Йонас (FI) (86) Заявка PCT: (87) Публикация заявки PCT: A WO 2018/002434 (04.01.2018) Адрес для переписки: 121205, г. Москва, территория инновационного центра"Сколково", ул. Нобеля, д. 5, оф. 125, ООО "ЦИС "Сколково", Котлов Дмитрий Владимирович R U (57) Формула изобретения 1. Способ обработки волокнистой массы, включающий стадию, во время которой волокнистую массу обрабатывают дистиллированной перкарбоновой кислотой и пероксидом, причем количество пероксида, в пересчете на 100%-ный пероксид, лежит в диапазоне от 0,01 кг до 1 кг на тонну волокнистой массы (в пересчете на сухую волокнистую массу). 2. Способ по п. 1, отличающийся тем, что дистиллированная перкарбоновая кислота является дистиллированной пермуравьиной кислотой, дистиллированной перуксусной кислотой (dPAA), дистиллированной перпропионовой кислотой или их смесью, предпочтительно - дистиллированной перуксусной кислотой (dPAA). 3. Способ по п. 1 или 2, отличающийся тем, что пероксид является пероксидом водорода, перкарбонатом или их смесью, предпочтительно - пероксидом водорода. 4. Способ по любому из пп. 1-3, отличающийся тем, что волокнистая масса является древесной волокнистой массой, предпочтительно - химической волокнистой массой, более предпочтительно - крафт-массой. 5. Способ по любому из пп. 1-4, отличающийся тем, что количество пероксида, в пересчете на 100%-ный пероксид, лежит в диапазоне от 0,01 кг до 0,8 кг на тонну волокнистой массы (в пересчете на ...

ОТБЕЛИВАЮЩИЕ СИСТЕМЫ В ПОЛИМЕРНОЙ ОБОЛОЧКЕ

... 1. Отбеливающая система, содержащая по меньшей мере один компонент, выбранный из группы, включающей отбеливающее средство, активатор отбеливания или катализатор отбеливания, отличающаяся тем, что отбеливающая система заключена в оболочку в виде покрытия, состоящего по меньшей мере из одного полимера с уретановыми и мочевинными группами. ! 2. Отбеливающая система по п.1, отличающаяся тем, что отбеливающая система, заключенная в оболочку в виде покрытия по меньшей мере из одного полимера, обладает формой частиц. ! 3. Отбеливающая система по п.1 или 2, отличающаяся тем, что средний диаметр частиц составляет от 0,01 до 5 мм. ! 4. Отбеливающая система по п.1 или 2, отличающаяся тем, что толщина полимерного покрытия составляет от 10 до 2000 мкм. ! 5. Отбеливающая система по п.1 или 2, отличающаяся тем, что она содержит по меньшей мере одно отбеливающее средство, но не содержит ни активатор, ни катализатор отбеливания. ! 6. Отбеливающая система по п.1 или 2, отличающаяся тем, что отбеливающее ...

Verfahren zur Delignifizierung von chemischen Zellstoffen

Bleichen von lignocellulosischen Materialien mit aktiviertem Sauerstoff.

Re-cycled fibre bleaching

BLEACHING OF CHEMICAL PULP WITH PERACID

The invention relates to a process for the bleaching of chemical pulp and th e use of a bleaching solution. According to the invention the pulp is treated in a plurality of different steps by using at least in o ne step a bleaching solution which contains a peracid, and the essential idea of the invention is that the peracid is used in a post-bleaching which is the last step of the bleaching process, the post bleaching being carried out in the presence of one or more earth-alkali metal compounds. By using a peracid the pulp is brought to its final brightness, and the purpose of the earth-alkali metal added is to combat the lowering of the viscosity of the pulp. According to the invention the post-bleaching can be carried out after the bleach plant steps in a pulp flo w pipe, a storage tower or in the paper machine at a paper mill.

A PROCESS FOR TREATING PULP

The present invention relates to a process for treating pulp comprising a step, wherein the pulp is treated with distilled percarboxylic acid, such as distilled per- carboxylic acid (dPAA), and peroxide, such as hydrogen peroxide.

PROCESS FOR PRODUCING MECHANICAL PULP SUITABLE FOR PAPER OR CARDBOARD MAKING

... ²²²Method for the production of mechanical or chemi-mechanical pulp as raw ²material for paper or cardboard. According to this method, the pulp is ²fibrillated and the fibrillated pulp is bleached in alkaline conditions. ²According to the present invention, the pulp is screened to separate the ²reject from the accept, at maximum approximately 60 % of the total amount of ²pulp is separated as the reject, the reject is bleached separate from the ²accept, and, after that, the bleached reject is remixed with the accept. When ²operating according to the present invention, the strength of the pulp ²increases and the energy used for refining is reduced, which is seen both in ²the refining of the reject and in the post-refining of the final mechanical ²pulp.² ...

AMBIENT TEMPERATURE PULP BLEACHING WITH PEROXYACID SALTS

The present invention relates to a Kraft pulp bleaching stage which is to be carried out after conventional bleaching stages to high brightness. It has been discovered that ambient-temperature blaching with inorganic peroxyacid salts, such as peroxymonosulfates, at this point can provide substantial increases in pulp brightness without significant decreases in pulp viscosity. Peroxyacid bleaching according to the present invention is carried out at ambient temperature and no greater than about 40 ~C and at an initial pH that is slightly alkaline and preferably about 7.25.

Delignification and/or bleaching paper paste

A process for the delignification and/or bleaching paper paste comprises at least one treatment step with an organic peroxide. The treatment is carried out in the presence of agents selected from phosphorus mineral acids and their salts.

Process for the bleaching of the straw and similar raw materials

PROCEEDED FOR THE DELIGNIFICATION AND THE BLEACHING OF PASTE PAPER CHEMICAL OR SEMI-CHIMIQUE OF BAGASSE HAS

LE PROCEDE CONSISTE A SOUMETTRE LA PATE CHIMIQUE OU SEMI-CHIMIQUE DE BAGASSE A UN TRAITEMENT PREALABLE AU MOYEN D'UN ACIDE PERSULFURIQUE OU D'UN SEL DE CET ACIDE. THE PROCESS CONSISTS OF SUBJECTING THE CHEMICAL OR SEMI-CHEMICAL BAGASSE PASTE TO A PRIOR TREATMENT BY MEANS OF A PERSULFURIC ACID OR A SALT OF THIS ACID.

Bleaching Trichomes to Remove Proteins

A process for bleaching trichome fibers individualized from a trichome source, such as a leaf and/or a stem, is disclosed. The process of bleaching degrades trichome associated protein. Further, the bleaching processes improves the color of the trichomes, exhibiting CIELAB Color values of L* greater than 87 and b* less than 17 and with less than 0.1% protein by weight of molecular weight greater than 3,500 daltons. 1. A process of treating individualized trichomes to remove proteins , whereby the process comprises:a. selecting a trichome containing biomass,b. individualizing the trichomes from the biomass, wherein the trichomes have a protein content,c. wetting the trichomes,d. reacting the trichomes with a reactant,e. removing the trichomes from the reaction, andf. measuring the protein content of the reacted trichomeswherein protein present in the individualized trichomes is reacted to break down the protein, yielding individualized trichomes with less than 0.1% protein by weight of molecular weight greater than 3,500 daltons.2. The process of wherein the reactant comprises a peracid.3. The process of wherein the peracid is peracetic acid.4. The process of wherein peracetic acid is generated by reacting N claim 3 ,N claim 3 ,N′ claim 3 ,N′-Tetraacetylethylenediamine with hydrogen peroxide.5. The process of wherein the temperature of the reacting step d is maintained above 20° C.6. The process of wherein the pH of the reacting step d is maintained above 5.0.7. The process of wherein the reaction of the reacting step d is for greater than 1 minute.8Stachys byzantina.. The process of wherein the biomass is from9. A process of treating individualized trichomes to remove proteins claim 1 , whereby the process comprises:a. selecting a trichome containing biomass,b. individualizing the trichomes from the biomass, wherein the trichomes have a protein content,c. wetting the trichomes,d. reacting the trichomes with a first reactant,e. reacting the trichomes with a second ...

Methods of pulp fiber treatment

In some embodiments, a method may include treating pulp in pulp and paper mills. The methods may include providing a peracetate oxidant solution and generating a reactive oxygen species. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate oxidant solution may provide enhanced treatment methods of bleaching, brightening, and delignifying pulp fibers involving the use of peracetate oxidant solutions.

BLEACHING AND SHIVE REDUCTION PROCESS FOR NON-WOOD FIBERS

The present invention is directed to a method of increasing the brightness of non-wood fibers and nonwoven fabric fabrics produced by the method. In one aspect, the method includes forming a mixture of non-wood fibers and exposing the mixture to a brightening agent to produce brightened fibers. The brightening agent is oxygen gas, peracetic acid, a peroxide compound, or a combination thereof. The brightened fibers have a brightness greater than the fibers of the mixture before exposure as measured by MacBeth UV-C standard. 1. Brightened bast fibers , comprising:a mean length of about 5 to about 95 millimeters (mm); anda brightness greater or equal to 80 as measured by a TAPPI brightness test.2. The brightened bast fibers of claim 1 , wherein the brightened bast fibers are substantially pectin-free and are flax fibers claim 1 , hemp fibers claim 1 , jute fibers claim 1 , ramie fibers claim 1 , nettle fibers claim 1 , Spanish broom fibers claim 1 , kenaf plant fibers claim 1 , or any combination thereof.3. A nonwoven fabric claim 1 , formed by a method comprising:forming bast fibers into fiber mat at consistency of about 20% to about 50%, the fibers having a mean length of about 5 to about 95 millimeters (mm); andexposing the fiber mat at the consistency of about 20% to about 50% to a brightening agent to produce brightened bast fibers, the brightening agent comprising a peroxide compound and oxygen gas, the oxygen gas being dissolved in solution and being about 0.1 to about 10.0% on fiber oxygen;wherein the brightened bast fibers have a brightness greater or equal to 80 as measured by a TAPPI standard.4. The nonwoven fabric of claim 3 , wherein the nonwoven fabric is a wet wiper claim 3 , a dry wiper claim 3 , an impregnated wiper claim 3 , a sorbent claim 3 , a medical supply product claim 3 , a personal protective fabric claim 3 , an automotive protective covering claim 3 , a personal care article claim 3 , a fluid filtration product claim 3 , a home furnishing ...

Methods of microbial control

In some embodiments, a method may include reducing the microbial load in contaminated water of water recycle loops. These water recycling loops may include pulp and paper mills, cooling towers and water loops, evaporation ponds, feedstock processing systems and/or non-potable water systems. The methods may include providing a peracetate oxidant solution. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate solution may provide bleaching, sanitizing and/or disinfection of contaminated water and surfaces. The peracetate oxidant solution may provide enhanced separation of microbes from contaminated water.

METHODS OF PULP FIBER TREATMENT

In some embodiments, a method may include treating pulp in pulp and paper mills. The methods may include providing a peracetate oxidant solution and generating a reactive oxygen species. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate oxidant solution may provide enhanced treatment methods of bleaching, brightening, and delignifying pulp fibers involving the use of peracetate oxidant solutions. 1. A method of treating pulp , comprising:contacting pulp with a parent oxidant solution;mixing the pulp with the parent oxidant solution; andgenerating a reactive oxygen species.2. The method of claim 1 , wherein the parent oxidant solution is a peracetate oxidant solution.3. The method of claim 1 , further comprising heating the pulp to a temperature from between about 50° C. to about 95° C.4. The method of claim 3 , wherein the heating accelerates the generation of reactive oxygen species from the parent oxidant solution.5. The method of claim 1 , further comprising delignifying the pulp.6. The method of claim 1 , further comprising extracting lignin from the pulp.7. The method of claim 1 , further comprising brightening the pulp.8. The method of claim 1 , further comprising bleaching the pulp.9. The method of claim 8 , further comprising replacing a chlorine stage.10. The method of claim 1 , further comprising reducing a waste water stream.11. The method of claim 1 , wherein the pulp consists of a suspension of cellulose fibers in water.12. The method of claim 1 , wherein the pulp comprises a pulp consistency from 0.1 to 20% pulp fiber.13. The method of claim 2 , wherein the peracetate ...

A process for treating pulp

The present invention relates to a process for treating pulp comprising a step, wherein the pulp is treated with distilled percarboxylic acid, such as distilled per-carboxylic acid (dPAA), and peroxide, such as hydrogen peroxide. 1. A process for treating pulp comprising treating the pulp with distilled percarboxylic acid and peroxide , wherein amount of the peroxide , as 100% peroxide , is from 0.01 kg to 1 kg per ton of pulp (as dry pulp).2. The process according to claim 1 , wherein the distilled percarboxylic acid is distilled performic acid claim 1 , distilled peracetic acid (dPAA) claim 1 , distilled perpropionic acid claim 1 , or a mixture thereof claim 1 , preferably distilled peracetic acid (dPAA).3. The process according to claim 1 , wherein the peroxide is hydrogen peroxide claim 1 , percarbonate claim 1 , or a mixture thereof.4. The process according to claim 1 , wherein the pulp is wood pulp claim 1 , chemical pulp claim 1 , or Kraft pulp.5. The process according to claim 1 , wherein amount of the peroxide claim 1 , as 100% peroxide claim 1 , is from 0.01 kg to 0.8 kg per ton of pulp (as dry pulp) claim 1 , from 0.04 kg to 0.6 kg per ton of pulp (as dry pulp) claim 1 , or from 0.06 kg to 0.5 kg per ton of pulp (as dry pulp).6. The process according to claim 1 , wherein amount of the distilled percarboxylic acid claim 1 , as 100% distilled percarboxylic acid claim 1 , is from 0.1 kg to 4 kg per ton of pulp (as dry pulp) claim 1 , or from 0.3 kg to 2 kg per ton of pulp (as dry pulp).7. The process according to claim 1 , wherein consistency of the pulp is from 2% to 30% claim 1 , or from 5% to 15%.8. The process according to claim 1 , wherein the pulp is treated at a temperature from 25° C. to 95° C. claim 1 , or from 40° C. to 70° C.9. The process according to claim 1 , wherein treatment time is from 30 min to 120 h claim 1 , from 1 h to 24 h claim 1 , or from 1 h to 6 h.10. The process according to claim 1 , wherein brightness of the pulp before the ...

Method for extracting cellusose, hemicellulose and lignin from lignocellulose from plant biomass

A process for obtaining cellulose, hemicellulose and lignin from lignocellulose can be carried out in an environmentally friendly manner when it comprises the following steps: step a) wherein a lignocellulose from plant biomass is provided, step b) wherein the lignocellulose is brought into contact with a first mixture M1 containing water and an alkaline component, and a first suspension S1 forms, the first suspension S1 comprises a first solid F1 and a first liquid phase P1, wherein the first solid F1 contains a crude cellulose, and the first liquid phase P1 contains hemicellulose and lignin, and step c) wherein the crude-cellulose-containing solid F1 is brought into contact with a second mixture M2 containing formic acid and water and optionally acetic acid, and a second suspension S2 forms, the second suspension S2 comprises a second solid F2 and a second liquid phase P2, wherein the second solid F2 contains a pure cellulose, and the second liquid phase P2 contains hemicellulose and lignin.

METHODS OF PULP FIBER TREATMENT

In some embodiments, a method may include treating pulp in pulp and paper mills. The methods may include providing a peracetate oxidant solution and generating a reactive oxygen species. The peracetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate oxidant solution may provide enhanced treatment methods of bleaching, brightening, and delignifying pulp fibers involving the use of peracetate oxidant solutions. 130-. (canceled)31. A method of treating pulp in a delignification process , the delignification process comprising:adding a parent oxidant solution to a pulp at a primary addition point and after the adding, mixing a mixture with the pulp with the added parent oxidant solution; and a pH in a range of from pH 10 to pH 12;', 'peracetate anions and a peracid with a molar ratio of peracetate anions to peracid of from 60:1 to 6000:1; and', 'either no hydrogen peroxide or hydrogen peroxide wherein a peracetate anion to hydrogen peroxide molar ratio is greater than 16:1; and, 'the parent oxidant solution being a peracetate oxidant solution to generate a reactive oxygen species in the resulting mixture, wherein the peracetate oxidant solution has the following properties as added to the pulpwherein after a period of time, separating from the pulp an oxidant liquor containing residual active oxidant and conveying the oxidant liquor to a secondary addition point, upstream of the primary addition point, where the pulp and the oxidant liquor are contacted and mixed.32. The method of claim 31 , wherein the pulp is at a temperature in a range of from 50° C. to 95° C. during the adding and mixing.33. The ...

Bleaching of chemical pulp with peracid

Peroxyacid delivery process

In a peroxyacid delivery process for the continuous generation of peroxyacid from hydrogen peroxide solution (5) and bleach activator (10) mixed together in a tank (1), the pH of the mixture is adjusted by the addition or injection of an alkaline material (16) selected from the group consisting of sodium hydroxide, potassium hydroxide and magnesium oxide under vigorous mixing conditions such as are provided by an in-line mixer (14) within which the Froude number is at least 1. Preferably the output of mixer (14) is fed though a pipe (18), which may be coiled through a cooling tank (19) for heat dissipation, to provide a residence time of 4 to 25 minutes for completion of the reaction without degradation of the product, which may be used for pulp bleaching. Preferably an excess of hydrogen peroxide is present, and sequestrant (3) is incorporated in the peroxide-activator mixture.

Bleaching Trichomes to Remove Proteins

A process for bleaching trichome fibers individualized from a trichome source, such as a leaf and/or a stem, is disclosed. The process of bleaching degrades trichome associated protein. Further, the bleaching processes improves the color of the trichomes. 1. A process of treating individualized trichomes to remove proteins , whereby the process comprises:a. selecting a trichome containing biomass;b. individualizing the trichomes from the biomass, wherein the trichomes have a protein content;c. wetting the trichomes;d. reacting the trichomes with a reactant comprising at least one one of a chlorite, a peroxide, and a peracid;e. removing the trichomes from the reaction; andf. measuring the protein content of the reacted trichomes;wherein protein present in the individualized trichomes is reacted with the reactant to break down the protein via oxidation, yielding individualized trichomes with less than 0.1% protein by weight of molecular weight greater than 3,500 daltons.2. The process of wherein the peracid is peracetic acid.3. The process of wherein peracetic acid is generated by reacting N claim 2 ,N claim 2 ,N′ claim 2 ,N′-Tetraacetylethylenediamine with hydrogen peroxide.4. The process of wherein the temperature of the reacting step d is maintained above 20° C.5. The process of wherein the pH of the reacting step d is maintained above 5.0.6. The process of wherein the reaction of the reacting step d is for greater than 1 minute.7Stachys byzantina.. The process of wherein the biomass is from8. A process of treating individualized trichomes to remove proteins claim 1 , whereby the process comprises:a. selecting a trichome containing biomass;b. individualizing the trichomes from the biomass, wherein the trichomes have a protein content;c. wetting the trichomes;d. reacting the trichomes with a first reactant;e. reacting the trichomes with a second reactant;f. removing the trichomes from the second reaction; andg. measuring the protein content of the reacted trichomes; ...

Method of delignifying and bleaching lignin-cellulose pulp

Изобретение относится к способу делигнификации и отбеливания лигноцеллюлозосодержащей пульпы, в котором пульпу делигнифицируют перкислотой или ее солью, обрабатывают комплексообразующим агентом и затем отбеливают отбеливателем, не содержащим хлор. Делигнификацию возможно осуществлять сильно окисляющей перуксусной кислотой, что приводит к заметному увеличению степени белизны и заметному уменьшению числа каппа после отбеливания отбеливателем, не содержащим хлора, и включающим по крайней мере одно из пероксидсодержащего соединения, озона или дитионита натрия или по выбору их последовательности или смеси. Эффект, выражающийся в увеличении степени белизны, является чрезвычайно селективным, т.е. вязкость пульпы поддерживают по сравнительно высокой степени. Как делигнификацию, так и обработку комплексообразующим агентом целесообразно осуществлять при pH, близком к нейтральному, что сводит к минимуму необходимость в регулировании pH и предоставляет возможность для внутреннего использования отработанного отбелочного раствора, например, для промывки пульпы. При конечном отбеливании озоном и перекисью водорода посредством предлагаемого способа можно получить пульпы мягкой древесины, имеющие степень белизны, превосходящую 90% ИСО, и удалить из пульпы практически весь лигнин при поддержании достаточной концентрации пульпы.

Perhydrolase providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Enzymes useful for peracid production

Acetyl xylan esterases and variants thereof having perhydrolytic activity are provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. Multi-component peracid generation systems comprising an enzyme catalyst having perhydrolytic activity are also provided, as are methods of using the present enzyme catalyst to produce peroxycarboxylic acids. The polypeptide having perhydrolytic activity may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, paper pulp processing, and personal care applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Perhydrolase variant providing improved specific activity

An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

Enzymes useful for peracid production

Acetyl xylan esterases and variants thereof having perhydrolytic activity are provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. Multi-component peracid generation systems comprising an enzyme catalyst having perhydrolytic activity are also provided, as are methods of using the present enzyme catalyst to produce peroxycarboxylic acids. The polypeptide having perhydrolytic activity may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, paper pulp processing, and personal care applications.

Delignification of lignocellulosic materials with peroxymonophosphoric acid

Disclosed is a method for the delignification of lignocellulosic materials with acidic solutions of peroxymonophosphoric acid for the delignification and brightening of cellulosic pulps in bleaching; for the production of cellulosic pulps for use in paper making and in regenerated cellulose products; for enhancing the properties of recycled cellulosic fibers and for use in animal feeds and other products where removal or degradation of lignin is beneficial.

Method of producing dissolving pulp, dissolving pulp and use of method

Method for production of mechanical wood pulp suitable for manufacturing of paper or cardboard

FIELD: textile, paper. ^ SUBSTANCE: method relates to production of mechanical or chemical-mechanical wood pulp applied as raw material for manufacturing of paper or cardboard, and may be used and pulp and paper industry. According to this method wood pulp is exposed to fibrillation. Produced wood pulp is screened to separate wastes from acceptable materials. At the same time wastes are removed in amount of maximum 60% of overall amount of wood pulp. Wastes and acceptable material are bleached separately. Wastes are bleached with the help of peroxide or peroxy acid. After that bleached wastes are mixed with bleached acceptable material. After combination they are exposed to finishing grinding, at the same time amount of consumed energy makes approximately 10-1000 kW-hr/ton. Finishing grinding is carried out at low concentration. Then wood pulp is batched into paper- or cardboard-making machine. Wastes are bleached in alkaline medium. ^ EFFECT: improved strength of wood pulp and reduction of energy consumed for grinding. ^ 12 cl, 1 dwg, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 391 453 (13) C2 (51) МПК D21B D21C 1/16 9/16 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007136823/12, 03.05.2006 (24) Дата начала отсчета срока действия патента: 03.05.2006 (43) Дата публикации заявки: 10.06.2009 2 3 9 1 4 5 3 R U (85) Дата перевода заявки PCT на национальную фазу: 03.12.2007 (86) Заявка PCT: FI 2006/000143 (03.05.2006) (87) Публикация PCT: WO 2006/128950 (07.12.2006) Адрес для переписки: 190000, Санкт-Петербург, Вох 1125, ООО "Патентика" (54) СПОСОБ ПОЛУЧЕНИЯ МЕХАНИЧЕСКОЙ ДРЕВЕСНОЙ МАССЫ, ПРИГОДНОЙ ДЛЯ ИЗГОТОВЛЕНИЯ БУМАГИ ИЛИ КАРТОНА (57) Реферат: Способ касается получения механической или химико-механической древесной массы, применяемой в качестве исходного материала для изготовления бумаги или картона, и может быть использован в целлюлозно-бумажной промышленности ...

Bleaching and shive reduction process for non-wood fibers

The present invention is directed to a method of increasing the brightness of non-wood fibers and nonwoven fabric fabrics produced by the method. In one aspect, the method includes forming a mixture of non-wood fibers and exposing the mixture to a brightening agent to produce brightened fibers. The brightening agent is oxygen gas, peracetic acid, a peroxide compound, or a combination thereof. The brightened fibers have a brightness greater than the fibers of the mixture before exposure as measured by MacBeth UV-C standard.

Oxidising agents

N-acyl compounds known as bleach activators especially tetraacetylalkylene diamines, are reacted with a peroxygen source in aqueous solution at an acidic pH to form an oxidising product which is a stronger oxidising agent than the peroxygen source used as the starting material. The product solution is used for instance as a bleach or disinfectant. The activator and disinfectant source may be provided as a concentrate product ready for dilution with components able to produce acidic pH in the aqueous solution. The product is, for instance in particulate solid form containing granules of activator and different granules of peroxygen source.

Pulp bleaching process including final stage brightening step with salt of peroxymonosulfuric acid

A process for bleaching lignocellulosic pulp in which a final brightening stage involves treating prebleached lignocellulosic pulp having a brightness with at least one peroxymonosulfuric acid salt to increase the brightness of the prebleached lignocellulosic pulp and provide a more fully bleached pulp. The more fully bleached pulp is not subjected to further brightening or delignification operations during the remainder of the process subsequent to the final brightening stage. The treatment is conducted at an initial pH at commencement of the final brightening stage in a range of from about 7 to about 12 and a final pH at the end of said final brightening stage in a range of from about 3 to about 9.

Wood pulp bleaching improvements

PROCESS FOR OXYGEN DELIGNIFICATION OF PAPER PULP

The invention features a method for oxygen delignification of paper pulp. This method comprises an activation pretreatment step using an organic peroxyacid such as paracetic acid before the oxygen delignification step or between two oxygen delignification stages. A level of delignification of about 70 to 75 % is obtained compared with about 50 % using the method of oxygen delignification with the usual pretreatment steps.

PROCESS FOR THE DELIGNIFICATION AND / OR BLEACHING OF A PULP

Method of producing a mixed peracid oxidizing solution and methods for treating substrates therewith

A process for treating a substrate, e.g., lignocellulosic pulp or cellulosic pulps with a mixed peracid solution comprising percarboxylic acid and Caro's acid which results in a higher conversion rate of the active oxygen in the hydrogen peroxide in order to provide an inexpensive and effective delignification and/or bleaching solution and the process for making the mixed peracid solution.

Bleaching of lignocellulosic pulp with ozone and peracid

The present invention relates to a method of bleaching lignocellulosic fiber material in a combination step with ozone and peracid, such as peracetic acid, ZHCPaaMC. The invention preferably relates to the bleaching of sulphate pulp. The pulp is ozone treated in a HC step in an ozone reactor, whereafter the pulp is diluted with water or white water, and peracid is added prior to an MC bleaching tower with subsequent washing.

Process for delignification of lignocellulose-containing pulp

Chlorine-free bleaching and delignification of alkali cellulose - by first treating with aq. organic peracid soln. and then with cyanamide (salt) activated hydrogen peroxide soln.

A process for Cl-free bleaching and delignification of alkali cellulose comprises treating the alkali cellulose (a) with an aq. soln. of an organic peracid and subsequently (b) with an alkaline cyanamide- or cyanamide salt-activated aq. H2O2 soln.. Pref. the peracid used in stage (a) is peracetic acid or performic acid. The active H2O2 content of the peracid is pref. 0.1-3 wt. % w.r.t. the dry wt. of the cellulose. USE/ADVANTAGE - The process allows prodn. of semi-bleached cellulose with a good degree of delignification and a whiteness (ISO) grade of 65-80 %, using relatively few bleaching stages and without using chlorine contg. bleaching agents. The prods. are useful e.g. for prodn. of high strength white papers.

Method for bleaching paper pulp

The invention concerns a method for bleaching different types of paper pulp in two steps at atmospheric pressure and at a temperature not higher than 100 °C. The first step consists in contacting the unbleached paste with a mixture of paracetic acid and performic acid. The second step consists in treating the bleached pulp derived from the first step, with a solution of soda and hydrogen peroxide. The resulting pulps exhibit a high index of whiteness and a degree of polymerisation close to unbleached pulps. The method is environmentally safe and non-polluting.

Method of producing dissolving pulp, dissolving pulp and use of method

A method of producing dissolving pulp from a recycled fibrous feedstock. The method comprises providing a fibrous material comprising cellulose, lignin and hemicellulose, said fibre source further having a lignin content of 0.1 to 7 % lignin and an ash content of up to 3%;subjecting the fibrour material to an alkaline extraction at a temperature of about0 to 25 º C, to produce fibres having a reduced content of hemicellulose; subjecting the fibres thus obtained to a bleaching treatment carried out with oxidative chemical reagents in order to reduce the lignin content of the fibres; and recovering the fibres thus obtained. By means of the method, dissolving pulp can be produced from recycled paper and cardboard products.

Methods for Obtaining Cellulose, Hemicellulose and Lignin from Lignocellulosic Derived from Plant Biomass

Enzymes useful for peracid production

本文提供了乙酰基木聚糖酯酶及其具有过水解活性的变体，以用于从羧酸酯和过氧源来产生过氧羧酸。还提供了包括具有过水解活性的酶催化剂的多组分的过酸生成体系，以及使用本发明的酶催化剂来产生过氧羧酸的方法。具有过水解活性的多肽可被用于产生适合用于诸如清洁、消毒、卫生处理、漂白、木浆加工、纸浆加工、和个人护理应用的多种应用的过氧羧酸。

Method for bleaching paper pulp

The invention concerns a method for bleaching different types of paper pulp in two steps at atmospheric pressure and at a temperature not higher than 100 °C. The first step consists in contacting the unbleached paste with a mixture of paracetic acid and performic acid. The second step consists in treating the bleached pulp derived from the first step, with a solution of soda and hydrogen peroxide. The resulting pulps exhibit a high index of whiteness and a degree of polymerisation close to unbleached pulps. The method is environmentally safe and non-polluting.

Process for bleaching and delignifying a chemical pulp by using a sequence in three stages of treatment not using chlorinated reagents and their application

Bleaching and shive reduction process for non-wood fibers

Methods for making mechanical pulp suitable for paper and cardboard manufacture

Process for the production of a peroxycarboxylic acid, composition and system for generating and supplying peracid

PROCESSO PARA A PRODUÇÃO DE UM ÁCIDO PEROXICARBOXÍLICO, COMPOSIÇÃO, SISTEMA DE GERAÇÃO E FORNECIMENTO DE PERÁCIDO, COMPOSIÇÃO DE TRATAMENTO DE ROUPA E PRODUTO PARA CUIDADOS PESSOAIS. São fornecidas acetil xilano esterases e suas variantes possuindo atividade perhidrolítica para a produção de ácidos peroxicarboxílicos a partir de ésteres de ácidos carboxílicos e de uma fonte de peroxigênio. São também fornecidos sistemas de geração de perácidos multicomponentes compreendendo um catalisador enzimático que possui atividade perhidrolítica, bem como métodos de uso do catalisador enzimático presente para produzir os ácidos peroxicarboxílicos. O polipeptídeo possuindo atividade perhidrolítica pode ser usado para produzir os ácidos peroxicarboxílicos adequados para a utilização em uma variedade de aplicações, tais como limpeza, desinfecção/sanitização, higienização, branqueamento, processamento da polpa de madeira, processamento da polpa de papel, e aplicações de cuidados pessoais. PROCESS FOR THE PRODUCTION OF A PEROXYCARBOXYLIC ACID, COMPOSITION, GENERATION SYSTEM AND SUPPLY OF PERACID, CLOTHING TREATMENT COMPOSITION AND PERSONAL CARE PRODUCT. Acetyl xylan esterases and variants thereof having perhydrolytic activity are provided for the production of peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. Also provided are multi-component peracid generation systems comprising an enzymatic catalyst having perhydrolytic activity, as well as methods of using the enzymatic catalyst present to produce the peroxycarboxylic acids. The polypeptide having perhydrolytic activity can be used to produce peroxycarboxylic acids suitable for use in a variety of applications, such as cleaning, disinfecting/sanitizing, sanitizing, bleaching, wood pulp processing, paper pulp processing, and cleaning applications. personal cares.

Process to delignify and bleach the pulp

Proceso para deslignificar y blanquear la pulpa, que comprende poner en práctica una primera etapa de blanqueo con peróxido de hidrógeno en presencia de un molibdato o un tungstato en una mezcla acuosa ácida; después de la primera etapa de blanqueo, poner en práctica una segunda etapa de blanqueo con peróxido de hidrógeno en una mezcla acuosa alcalina; y después de la segunda etapa de blanqueo, poner en práctica una tercera etapa de blanqueo con peróxido de hidrógeno en presencia de un molibdato o ... Process for delignification and bleaching of the pulp, which comprises carrying out a first stage of bleaching with hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture; after the first bleaching stage, implement a second hydrogen peroxide bleaching stage in an alkaline aqueous mixture; and after the second bleaching stage, implement a third bleaching stage with hydrogen peroxide in the presence of a molybdate or ...

Bleaching process for e.g. sulphate pulp, uses Caros acid prepared by reacting hydrogen peroxide with sulphuric acid obtained from gases generated during pulp waste liquor oxidation

The sulphuric acid reacted with hydrogen peroxide to form Caros acid is derived from the sulphurous gas generated during partial oxidation of pulp waste liquors. A method using Caros acid (peroxymonosulphuric acid) for the treatment of wood chips and/or cellulose pulp, involves the application and preparation of the acid in a completely or partially closed system. The acid is prepared by reacting hydrogen peroxide with sulphuric acid, the latter being at least partially derived from the sulphurous gas generated during partial oxidation of pulp waste liquors.

oxygen / ozone / peracetic acid delignification and bleaching of cellulose pulp

Process for bleaching pulp comprising finishing steps with salt of peroxymonosulfuric acid

Process for bleaching a chemical paper pulp

Process for processing mechanical masses

Delignification process for chemical pulp

Procédé pour la délignification d'une pâte à papier chimique Procédé pour l'amélioration de la sélectivité de la délignification d'une pâte à papier chimique au moyen d'un peroxyacide selon lequel on traite la pâte écrue provenant de l'opération de cuisson par une solution aqueuse de ce peroxyacide organique en présence d'au moins un stabilisant sélectionné parmi les acides phosphoniques et leurs sels. Pas de figure.

Methods for cleaning pulp in chemical pulp mills.

A method in connection with washing of pulp at a chemical pulp mill including at least an alkaline cooking process utilizing cooking liquor for producing pulp, brown stock treatment with essentially closed liquid cycles, in which the last washing device is a washing device based on pressing of pulp, a press or a washing press, a pulp bleaching plant using ECF-bleaching, wherein chloride-containing effluents are formed, a chemical recovery plant and effluent purification. The liquid flows generated at a chemical pulp mill are efficiently circulated without disturbing the main process and minimizing the emissions from the mill. Purified effluent in the amount of at least 1 m3/adt pulp is introduced into the dilution after the press or washing press, whereby the effluent is passed from the dilution into the first process stage of the bleaching.

Methods of microbial control

In some embodiments, a method may include reducing the microbial load in contaminated water of water recycle loops. These water recycling loops may include pulp and paper mills, cooling towers and water loops, evaporation ponds, feedstock processing systems and/or non-potable water systems. The methods may include providing a peracetate oxidant solution. The per-acetate solution may include peracetate anions and a peracid. In some embodiments, the peracetate solution may include a pH from about pH 10 to about pH 12. In some embodiments, the peracetate solution has a molar ratio of peracetate anions to peracid ranging from about 60:1 to about 6000:1. In some embodiments, the peracetate solution has a molar ratio of peracetate to hydrogen peroxide of greater than about 16:1. The peracetate solution may provide bleaching, sanitizing and/or disinfection of contaminated water and surfaces. The peracetate oxidant solution may provide enhanced separation of microbes from contaminated water.

Pulp bleaching process including final stage treatment step with salt of peroxymonosulfuric acid

A process for bleaching lignocellulosic pulp in which a final bleaching stage involves treating prebleached lignocellulosic pulp having a brightness with at least one peroxymonosulfuric acid salt to increase the brightness of the prebleached lignocellulosic pulp and provide a more fully bleached pulp. The more fully bleached pulp is not subjected to further brightening or delignification operations during the remainder of the process subsequent to the final bleaching stage. The treatment is conducted at an initial pH at commencement of the final bleaching stage in a range of from about 7 to about 12 and a final pH at the end of said final bleaching stage in a range of from about 3 to about 9. Optionally, the bleaching process may comprise only one stage wherein the peroxymonosulfuric acid salt treatment is carried out with unbleached pulp, e.g. mechanical or sulfite pulp. Kraft pulp and/or recycled pulp are preferred materials for use in the present invention for the production of the bleached articles.

Method for delignifying and bleaching pulp

Method for delignifying and bleaching pulp, comprising a first bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture, followed by a second bleaching stage using hydrogen peroxide in an alkaline aqueous mixture, and followed by a third bleaching stage using hydrogen peroxide in the presence of a molybdate or a tungstate in an acidic aqueous mixture.

Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity

The invention relates to a method for treating mechanical pulp so that aliphatic percarboxylic acid in the amount of 0.5 - 5 kg/ton of pulp is adde d to the pulp to improve the opacity.

METHOD FOR THE PRODUCTION OF CELLULAR THROUGH ONE-STEP COOKING WITH FORMIC ACID AND LAUNDRY WITH PERAMIC ACID

Improving the selectivity of delignification of chemical pulp using an

A process for improving the selectivity of delignification of a chemical paper pulp, in which the pulp is treated with an aqueous solution of an organic peroxy acid at 2 - 47 degrees C., followed by a water wash and a supplementary stage of alkaline extraction in the presence of hydrogen peroxide.

Method of producing a mixed peracid oxidizing solution and methods for treating substrates therewith

Process to improve selectivity in chemical pulp delignification

Delignification and bleaching of lignocellulosic pulp with peracid and chlorine-free bleach

Chemical paper pulp delignification method

METHOD FOR BLEACHING AND DELIGNIFYING CHEMICAL PAPER FIBERS.

METHOD RELATED TO WASHING THE PULP IN A PULP FACTORY

Un método relacionado con el lavado de la pulpa en una fábrica de pulpa, que comprende al menos un proceso de digestion alcalina donde se utiliza el licor de digestion para producir pulpa, un tratamiento del lavado de pulpa marron que tiene un ciclo líquido esencialmente cerrado y cuyo ultimo aparato de lavado es un aparato de lavado basado en el prensado de la pulpa, una prensa o una prensa de lavado, una planta de blanqueo donde se usa un blanqueo ECF y donde se forman efluentes que contienen cloruro, una planta de recuperacion química, y el tratamiento del efluente. El objetivo de la presente es proporcionar un método para usar los flujos líquidos generados en la fábrica de pulpa con un fin ventajoso, para reciclarlos de forma eficiente sin alterar el proceso principal y minimizar los efluentes de la fábrica de pulpa. Una característica propia de la presente es que se introduce agua de desecho purificada en una cantidad de al menos 1 m3/adt de pulpa en la dilucion posterior a la prensa o la prensa de lavado, donde el agua de desecho fluye desde la dilucion hasta la primera etapa del proceso de blanqueo. A method related to the pulp washing in a pulp factory, which comprises at least one alkaline digestion process where the digestion liquor is used to produce pulp, a brown pulp washing treatment that has an essentially closed liquid cycle and whose last washing device is a washing device based on pulp pressing, a press or a washing press, a bleaching plant where ECF bleaching is used and where chloride containing effluents are formed, a chemical recovery plant , and effluent treatment. The objective of the present is to provide a method to use the liquid flows generated in the pulp mill for an advantageous purpose, to recycle them efficiently without altering the main process and minimizing the effluents from the pulp mill. A characteristic of the present is that purified waste water is introduced in an amount of at least 1 m3 / adt of pulp in the post-press or ...

Bleaching of chemical pulp with peracid

The invention relates to a process for the bleaching of chemical pulp and the use of a bleaching solution. According to the invention the pulp is treated in a plurality of different steps by using at least in one step a bleaching solution which contains a peracid, and the essential idea of the invention is that the peracid is used in a post-bleaching which is the last step of the bleaching process, the post bleaching being carried out in the presence of one or more earth-alkali metal compounds. By using a peracid the pulp is brought to its final brightness, and the purpose of the earth-alkali metal added is to combat the lowering of the viscosity of the pulp. According to the invention the post-bleaching can be carried out after the bleach plant steps in a pulp flow pipe, a storage tower or in the paper machine at a paper mill.

bleach system, process for preparing bleach system, detergent formulation, and use of a bleach system or detergent formulation

<B>SISTEMA ALVEJANTE, PROCESSO PARA PREPARAÇçO DE SISTEMA ALVEJANTE, FORMULAÇçO DETERGENTE, E, USO DE UM SISTEMA ALVEJANTE OU DE UMA FORMULAÇçO DETERGENTE<D>A invenção refere-se a um sistema alvejante compreendendo pelo menos um composto selecionado de agente alvejante, ativador de alvejante e catalisador de alvejamento, caracterizado pelo fato de que o sistema alvejante tem sido envelopado por pelo menos uma camada polimérica e o polímero possui grupos uretano e uréia. O sistema alvejante eas formulações detergentes da invenção compreendendo este sistema alvejante são adequados, por exemplo, para lavagem e alvejamento de materiais têxteis ou louça. <B> Bleaching System, Process for Preparing a Bleaching System, Detergent Formulation, and Use of a Bleaching System or a Formulation <D> The invention relates to a bleaching system comprising at least one selected bleaching agent compound, bleach activator and bleach catalyst, characterized in that the bleach system has been enveloped by at least one polymeric layer and the polymer has urethane and urea groups. The bleach system and detergent formulations of the invention comprising this bleach system are suitable, for example, for washing and bleaching textile materials or dishes.

Process for bleaching a chemical pulp

PAPER PASTE WHITENING PROCEDURE.

Procedimiento de blanqueamiento de pastas de papel crudas mediante unos perácidos orgánicos caracterizado por el hecho de que se efectúa en dos etapas a la presión atmosférica y a una temperatura inferior o igual a 100°C: - La primera etapa consiste en una puesta en contacto de la pasta cruda con una mezcla de ácido peracético y de ácido perfórmico de manera que la mezcla obtenida tenga una concentración en agua inferior o igual a 15% en peso. - La segunda etapa consiste en un tratamiento de la pasta blanqueada obtenida, tras separación mecánica del medio de reacción obtenido al final, de la primera etapa, por una solución de sosa y de agua oxigenada. Procedure for bleaching raw paper pulps by means of organic peracids characterized by the fact that it is carried out in two stages at atmospheric pressure and at a temperature lower than or equal to 100 ° C: - The first stage consists in bringing the raw paste with a mixture of peracetic acid and perfromic acid so that the mixture obtained has a concentration in water of less than or equal to 15% by weight. - The second stage consists of a treatment of the bleached pulp obtained, after mechanical separation of the reaction medium obtained at the end, from the first stage, by a solution of soda and hydrogen peroxide.

Cellulose paper waste bleaching method

Cellulose paper waste bleaching method comprising at least one step using an organic peracid in the absence of Caro acid.

Process for improving the selectivity in the delignification of a chemical pulp

Procédé pour l'amélioration de la sélectivité de la délignification d'une pâte à papier chimique au moyen d'un peroxyacide organique selon lequel on traite la pâte écrue provenant de l'opération de cuisson par une solution aqueuse de ce peroxyacide organique et que l'on opère le traitement à une température comprise entre 2 et 47° C. Method for improving the selectivity of delignification chemical pulp using peroxyacid organic whereby the unbleached pulp from the cooking operation with an aqueous solution of this peroxyacid organic and that the treatment is carried out at a temperature between 2 and 47 ° C.

Oxygen / ozone / peracetic acid delignification and bleaching of cellulosic pulps

Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents

Improved method of bleaching of old corrugated container and other waste paper pulps

A method for bleaching old corrugated containers and other waste paper pulp to enhanced brightness levels which comprises the steps of: a) pre-treatment of starting waste paper pulp with a chelating agent, b) reaction with peroxymonosulphuric acid, and c) bleaching the reacted pulp with hydrogen peroxide.

Bleached pulp

Die Erfindung betrifft einen gebleichten Faserstoff aus Holz mit einem Weißgrad von > 80% ISO und einem Bulk von über 1,3 cm<SUP>3</SUP>/g mit - einer Reißlänge von mehr als 7,5 km bei 15 °SR und einem Ligningehalt von mindestens 13%, bezogen auf den otro Faserstoff für Nadelholz im gebleichten Zustand, und mit - einer Reißlänge von mehr als 5,0 km bei 20 °SR und einem Ligningehalt von mindestens 10%, bezogen auf den otro Faserstoff für Laubholz im gebleichten Zustand, dadurch gekennzeichnet, dass der Faserstoff nach dem Aufschluss nur mit ligninerhaltenden Chemikalien behandelt wurde. The invention relates to a bleached wood pulp having a brightness of> 80% ISO and a bulk of over 1.3 cm <SUP> 3 </ SUP> / g with a tearing length of more than 7.5 km at 15 ° SR and a lignin content of at least 13%, based on the otro pulp for softwood bleached, and having a tenacity of more than 5.0 km at 20 ° SR and a lignin content of at least 10%, based on the otro pulp for hardwood in the bleached state, characterized in that the pulp was treated after digestion only with lignin-containing chemicals.

Bleaching of Lignocellulosic Material with Activated Oxygen