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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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16-04-1996 дата публикации

УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ МЕТАЛЛИЧЕСКОГО СКАНДИЯ ВЫСОКОЙ ЧИСТОТЫ

Номер: RU0000001997U1
Автор: Кудрявцев П.Г.
Принадлежит: Научно-производственное предприятие "Тривектр"

УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ МЕТАЛЛИЧЕСКОГО СКАНДИЯ ВЫСОКОЙ ЧИСТОТЫ, содержащее тигель для чернового металла с нагревателем и конденсатор, отличающееся тем, что тигель и конденсатор выполнены из газофазного вольфрама, причем конденсатор выполнен в виде стакана с водоохлаждаемым дном. (19) RU (11) (13) 1 997 U1 (51) МПК C22B 59/00 (1995.01) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К СВИДЕТЕЛЬСТВУ (21), (22) Заявка: 93015452/02, 24.03.1993 (46) Опубликовано: 16.04.1996 (71) Заявитель(и): Научно-производственное предприятие "Тривектр" (72) Автор(ы): Кудрявцев П.Г. U 1 1 9 9 7 R U Ñòðàíèöà: 1 U 1 (57) Формула полезной модели УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ МЕТАЛЛИЧЕСКОГО СКАНДИЯ ВЫСОКОЙ ЧИСТОТЫ, содержащее тигель для чернового металла с нагревателем и конденсатор, отличающееся тем, что тигель и конденсатор выполнены из газофазного вольфрама, причем конденсатор выполнен в виде стакана с водоохлаждаемым дном. 1 9 9 7 (54) УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ МЕТАЛЛИЧЕСКОГО СКАНДИЯ ВЫСОКОЙ ЧИСТОТЫ R U (73) Патентообладатель(и): Научно-производственное предприятие "Тривектр" U 1 U 1 1 9 9 7 1 9 9 7 R U R U Ñòðàíèöà: 2 RU 1 997 U1 RU 1 997 U1

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Номер записи: 1
27-02-2007 дата публикации

ТЕХНОЛОГИЧЕСКИЙ УЧАСТОК ДЛЯ ПЕРЕРАБОТКИ И ДЕЗАКТИВАЦИИ ОТХОДОВ ПРОИЗВОДСТВА И ИЗБИРАТЕЛЬНЫМ ИЗВЛЕЧЕНИЕМ СКАНДИЯ

Номер: RU0000061288U1
Автор: Кудрявский Юрий Петрович, Погудин Олег Владимирович
Принадлежит: ООО Научно-производственная экологическая фирма "ЭКО-технология"

Технологический участок для переработки и дезактивации отходов производства с избирательным извлечением скандия, включающий ванну гидроудаления отработанных расплавов титановых хлораторов, снабженную системой подачи в нее азота для перемешивания образующейся пульпы, гидроотстойник, циркуляционный бак, имеющий соединение с баками-дозаторами растворов сульфита натрия и хлорида бария, фильтр-пресс-I, соединенный баком-сборником осветленных исходных растворов, реактор для осаждения суммы гидроксидов хрома, скандия, титана, циркония и алюминия, верхние патрубки которого соединены с баками-дозаторами раствора гидроксида натрия и высокомолекулярного флокулянта, а сливной патрубок образует соединение с фильтром-прессом-II для выделения осадка суммы гидроксидов хрома, скандия, титана, циркония и алюминия, шнековый смеситель-I, входной конус которого соединен с корытом фильтр-пресса-I, бункером пыли от руднотермической плавки титан-содержащих концентратов и патрубком разгрузочного устройства гидроотстойника, а выход направлен во второй шнековый смеситель-II, соединенный с бункером исходных магний-содержащих оксидных материалов, баком-дозатором раствора и/или пульпы хлорида магния и с блоком формования, термообработки и прессования композиционной смеси, отличающийся тем, что выход осветленного хлоридного раствора с фильтр-пресса-II направлен в сборную емкость, корыто фильтр-пресса-II имеет соединение через разгрузочный люк с обогреваемым реактором-репульпатором, снабженным мешалкой и имеющем на верхней крышке патрубок, подсоединенный через запорную арматуру к баку-дозатору щелочного раствора гипохлорита натрия, а патрубок нижнего слива реактора-репульпатора имеет соединение с вакуумным нутч-фильтром, к которому подсоединена линия подачи раствора гидроксида натрия из бака-дозатора и воды, слив фильтрата очищенного от оксигратного осадка хроматного раствора из вакуумного фильтр-пресса направлен в сборную емкость хроматного раствора, вакуумный нутч-фильтр имеет соединение через ...

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Номер записи: 2
27-06-2007 дата публикации

АППАРАТУРНО-ТЕХНОЛОГИЧЕСКИЙ КОМПЛЕКС ДЛЯ ОБЕЗВРЕЖИВАНИЯ И ДЕЗАКТИВАЦИИ ОТХОДОВ ТИТАНОВОГО ПРОИЗВОДСТВА С ПОЛУЧЕНИЕМ СКАНДИЕВЫХ КОНЦЕНТРАТОВ

Номер: RU0000064214U1
Автор: Кудрявский Юрий Петрович, Кутырева Ольга Александровна, Погудин Олег Владимирович, Шенфельд Борис Евгеньевич
Принадлежит: ООО Научно-производственная экологическая фирма "ЭКО-технология"

Аппаратурно-технологический комплекс для обезвреживания и дезактивации отходов титанового производства с получением скандиевых концентратов, включающий ванну гидроудаления отработанных расплавов титановых хлораторов, снабженную системой подачи в нее азота для перемешивания образующейся пульпы, гидроотстойник, циркуляционный бак, имеющий соединение с баками-дозаторами растворов сульфита натрия и хлорида бария, фильтр-пресс-I, соединенный баком-сборником осветленных исходных растворов, реактор для осаждения суммы гидроксидов хрома, скандия, титана, циркония и алюминия, верхние патрубки которого соединены с баками-дозаторами раствора гидроксида натрия и высокомолекулярного флокулянта, а сливной патрубок образует соединение с фильтром-прессом-II для выделения осадка суммы гидроксидов хрома, скандия, титана, циркония и алюминия, шнековый смеситель-I, входной конус которого соединен с корытом фильтр-пресса-I, бункером пыли от руднотермической плавки титансодержащих концентратов и патрубком разгрузочного устройства гидроотстойника, а выход направлен во второй шнековый смеситель-II, соединенный с бункером исходных магнийсодержащих оксидных материалов, баком-дозатором раствора и/или пульпы хлорида магния и с блоком формования, термообработки и прессования композиционной смеси, отличающийся тем, что выход осветленного хлоридного раствора с фильтр-пресса-II направлен в сборную емкость, корыто фильтр-пресса-II имеет соединение через разгрузочный люк с обогреваемым реактором-репульпатором, снабженным мешалкой и имеющем на верхней крышке патрубок, подсоединенный через запорную арматуру к баку-дозатору щелочного раствора гипохлорита натрия, а патрубок нижнего слива реактора-репульпатора имеет соединение с вакуумным нутч-фильтром, к которому подсоединена линия подачи раствора гидроксида натрия из бака-дозатора и воды, слив фильтрата, очищенного от оксигратного осадка хроматного раствора из вакуумного фильтр-пресса, направлен в сборную емкость хроматного раствора, вакуумный нутч- ...

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Номер записи: 3
21-06-2012 дата публикации

Rare earth recovery from phosphor material and associated method

Номер: US20120152062A1
Автор: Alok Mani Srivastava, Karthick Vilapakkam Gourishankar, Prasanth Kumar Nammalwar, Satya Kishore Manepalli
Принадлежит: General Electric Co

A method for recovering at least one rare earth element from a phosphor is presented. The method includes a halogenation step (a) and a reduction step (b). The phosphor is first halogenated in a molten salt to convert at least one rare earth constituent contained therein to a soluble rare earth halide. Then, the rare earth halide in the molten salt can be reduced, to convert the rare earth halide to a rare earth element in its elemental state. A method for individually recovering multiple rare earth elements from a phosphor is also presented.

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Номер записи: 4
18-04-2013 дата публикации

Method for recovering rare earth, vanadium and nickel

Номер: US20130091989A1
Автор: Ming-Zhe Tsai, Yu-Lung Sun, Yung-Hao LIU
Принадлежит: Hong Jing Environment Co

A method for recovering rare earth, vanadium and nickel from waste vanadium-nickel catalysts, comprising steps of: acid leaching, by soaking waste vanadium-nickel catalysts into a sulfuric acid solution and obtaining a mixture containing alumina silica slag; sedimentation, by filtering out the alumina silica slag from the mixture to obtain a filtrate, and then adding a salt into the filtrate to precipitate rare earth followed by isolating a sediment of rare earth double salts and a liquid solution via filtration; and extraction, by providing and adding an alkali into the sediment of rare earth double salts followed by further soaking the rare earth double salts in an acid solution to precipitate rare earth, and adding an oxidizer into the liquid solution to adjust the pH value thereof and then extracting vanadium and nickel from the liquid solution via an ion-exchange resin.

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Номер записи: 5
02-05-2013 дата публикации

METHOD FOR MATERIALS RECOVERY FROM CATALYSTS COMPRISING IRON, CERIUM, MOLYBDENUM, AND POTASSIUM

Номер: US20130108526A1
Автор: Altwasser Stefan, Buch Steffen, Schubert Markus, WALSDORFF Christian
Принадлежит: BASF SE

A method for materials recovery from a catalyst comprising oxides of iron, cerium, molybdenum, and potassium, in which potassium and molybdenum are removed by treating the catalyst with an aqueous leachant, giving an aqueous solution S1 comprising potassium and molybdenum, and a solid residue R1 comprising cerium oxide and iron oxide, and recovering cerium in the form of a solid comprising a cerium(III) compound or cerium(IV) oxide from the solid residue R1. 111.-. (canceled)12. A method for materials recovery from a catalyst comprising oxides of iron , cerium , molybdenum , and potassium , in which potassium and molybdenum are removed by treating the catalyst with an aqueous leachant , giving an aqueous solution S1 comprising potassium and molybdenum , and a solid residue R1 comprising cerium oxide and iron oxide , and recovering cerium in the form of a solid comprising a cerium(III) compound or cerium(IV) oxide from the solid residue R1.13. The method according to claim 12 , wherein the catalyst claim 12 , before being treated with the aqueous leachant claim 12 , is heated in an atmosphere comprising oxygen.14. The method according to claim 12 , wherein the catalyst claim 12 , before being treated with the aqueous leachant claim 12 , is mechanically comminuted.15. The method according to claim 12 , wherein the solid residue R1 comprising cerium oxide and iron oxide is treated with a mineral acid claim 12 , to recover an iron-containing solution S2 and a solid residue R2 comprising cerium(IV) oxide.16. The method according to claim 15 , wherein the solid residue R2 comprising cerium(IV) oxide is dissolved claim 15 , with reduction of cerium(IV) to cerium(III) claim 15 , in a mineral acid claim 15 , giving a solution S4 claim 15 , and cerium is precipitated in the form of a cerium(III) compound from the solution S4 by addition of a basic precipitant.17. The method according to claim 16 , wherein an iron(II) compound or metallic iron is added as reducing agent to the ...

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Номер записи: 6
09-05-2013 дата публикации

METHOD FOR SEPARATING NICKEL AND COBALT FROM ACTIVE MATERIAL CONTAINED IN SPENT NICKEL-METAL HYDRIDE BATTERY

Номер: US20130112043A1
Автор: Asano Satoshi, Kikuta Naoko, TAKANO Masatoshi
Принадлежит: SUMITOMO METAL MINING CO., LTD.

A method for separating nickel, cobalt and a rare earth element from a material containing positive and negative electrode active materials of a nickel-metal hydride battery includes mixing a material containing positive and negative electrode active materials with a sulfuric acid solution and dissolving therein, and then separating a leachate from a residue; adding an alkali metal sulfate to the leachate to obtain a mixed precipitate of double sulfate of rare earth elements, and a rare-earth-element-free solution; and adding a sulfurizing agent to the rare-earth-element-free solution to separate a nickel and cobalt sulfide raw material and a residual solution. 1. A method for separating nickel , cobalt , and a rare earth element from a material containing positive and negative electrode active materials of a nickel-metal hydride battery , wherein a sulfide containing nickel and cobalt and a sulfate containing a rare earth element are obtained from the material containing positive and negative electrode active materials which constitutes the nickel-metal hydride battery , the method comprising:(1) a leaching step of mixing the material containing positive and negative electrode active materials with a sulfuric acid solution and dissolving therein, followed by separating a leachate from a residue,(2) a rare earth crystallization step of adding an alkali metal sulfate to the leachate obtained in the leaching step and thereby obtaining a mixed precipitate of double sulfate of a rare earth element and a rare-earth-element-free solution, and(3) a sulfide raw material recovery step of adding a sulfurizing agent to the rare-earth-element-free solution obtained in the rare earth crystallization step and thereby separating a nickel and cobalt sulfide raw material from a residual solution, and(4) a dezincification step of adding a sulfurizing agent to the rare-earth-element-free solution obtained in the rare earth crystallization step to separate zinc in the rare-earth- ...

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Номер записи: 7
04-07-2013 дата публикации

METHOD FOR RECYCLING OF RARE EARTH AND ZIRCONIUM OXIDE MATERIALS

Номер: US20130171047A1
Автор: Burlingame Nicholas H., Burlingame Samuel
Принадлежит:

A method is presented for recovery, in reusable form, of rare earth minerals and zirconia from waste materials containing them. The method includes: mixing an ammonium sulfate powder and a powder containing the oxide waste material; heating the mixture to decompose the waste into a residue; dissolving the residue in water; separating rare earth constituents from the solution; and subsequently using the separated rare earth constituent (salt or solution) as a raw material. Moreover, the reactants used in the recovery may be recovered by appropriate precipitation and concentration operations. 1. A method for the recovery , in reusable form , of rare earth minerals from waste materials containing rare earth and zirconia , comprising:a. mixing an ammonium sulfate powder and a powder containing the oxide waste material;b. firing the mixture at a temperature sufficient to decompose a waste residue which is, to a large degree, soluble in an aqueous solution;c. dissolving the residue in water to obtain a solution that includes rare earth constituents in salt form;d. separating rare earth constituents from the solution using at least one separation method; ande. subsequently using a separated rare earth constituent as a raw material.2. The method according to wherein the waste materials include compounds selected from the group consisting of the oxides of scandium claim 1 , yttrium claim 1 , lanthanum claim 1 , cerium claim 1 , praseodymium claim 1 , neodymium claim 1 , samarium claim 1 , europium claim 1 , gadolinium claim 1 , terbium claim 1 , dysprosium claim 1 , erbium claim 1 , ytterbium and mixtures thereof with zirconia.3. The method according to wherein the waste materials are byproducts of processes selected from the group consisting of: thermal spray coating claim 1 , electron beam vapor deposition claim 1 , green machining of dental materials claim 1 , and cubic zirconium gem production.4. The method according to wherein the waste materials include coatings and ...

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Номер записи: 8
08-08-2013 дата публикации

Liquid collection process with secondary channels for in-situ leaching an ore body to extract rare earth elements

Номер: US20130200681A1
Автор: Guoqing Deng, Xiaolin He, Yan Liu, Yaofeng Tan
Принадлежит: Jiangxi Rare Earth and Rare Metals Tungsten Group Holding Co Ltd

A liquid collection process with secondary channels for in-situ leaching an ore body to extract rare earth elements, including: 1) multiple liquid collection channels are provided in an ore body; 2) secondary channels are provided on both sides of the liquid collection channels, and all of the channels jointly constitute a multi-channel mother liquid drainage and collection control network; 3) a blocking wall is provided in the liquid collection channels, the front lower part of the wall is connected to a channel outlet by a conduit which is controlled with a ball valve switch at the outlet; 4) in the measurement and production, a multi-channel mother liquid collection network of liquid collection engineering control system is finally formed through the alternate operation of pressure release and increase; 5) the rare earth recovery rate is finally improved by adjusting the non-mineral liquid and the loss ratio of the mother liquid.

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Номер записи: 9
10-10-2013 дата публикации

Magnet Recycling

Номер: US20130263699A1
Автор: Allan Walton, Andrew Williams, Ivor Rex Harris, John D. Speight
Принадлежит: UNIVERSITY OF BIRMINGHAM

The present invention discloses a method for recovering rare earth particulate material from an assembly comprising a rare earth magnet and comprises the steps of exposing the assembly to hydrogen gas to effect hydrogen decrepitation of the rare earth magnet to produce a rare earth particulate material, and separating the rare earth particulate material from the rest of the assembly. The invention also resides in an apparatus for separating rare earth particulate material from an assembly comprising a rare earth magnet. The apparatus comprises a reaction vessel having an opening which can be closed to form a gas-tight seal, a separator for separating the rare earth particulate material from the assembly, and a collector for collecting the rare earth particulate material. The reaction vessel is connected to a vacuum pump and a gas control system, and the gas control system controls the supply of hydrogen gas to the reaction vessel.

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Номер записи: 10
24-10-2013 дата публикации

Method for Manufacturing Adsorptive Ball for Recovering Precious Metals and Flow Through-Continous Deionization (FT-CDI) Apparatus Using the Same

Номер: US20130277220A1
Автор: Hwang Teak Sung, Jung Won Ho, Koo Jin Sun, Kwak Noh-Seok, Park Hui-Man, Park Sung-gyu
Принадлежит:

Disclosed is an adsorptive ball for recovering precious metals and resources, a method for manufacturing the adsorptive bale, a flow through-continuous deionization (FT-CDI) module capable of recovering precious metals by using the adsorptive ball, and a flow through-continuous deionization (FT-CDI) apparatus having the flow through-continuous deionization (FT-CDI) installed thereat. 1. A method for manufacturing a microsphere , the method comprising:dispersing complex metal oxide particles in a monomer mixture, followed by polymerizing, to thereby prepare a microsphere and the fired microsphere;ion-exchanging the fired microsphere with an inorganic acid solution; anddrying the ion-exchanged microsphere.2. The method of claim 1 , wherein the complex metal oxide particle contains a lithium ion.3. The method of claim 1 , wherein the firing is performed at a firing temperature of 200˜500° C.4. A method for recovering precious metals using a flow through-continuous deionization (FT-CDI) apparatus claim 1 , the method comprising:drying a microsphere obtained by dispersing complex metal oxide particles in a monomer mixture, followed by polymerizing, and then ion-exchanging the microsphere with an inorganic acid, to thereby prepare an adsorptive ball;adsorbing precious metal ions in the adsorptive ball; andrecovering the precious metal ions by allowing the adsorptive ball in which the precious metal ions are adsorbed to continuously pass through a flow through-continuous deionization (FT-CDI) module.5. The method of claim 4 , wherein the flow through-continuous deionization (FT-CDI) module includes a bead supply unit claim 4 , separating membranes of the bead supply unit claim 4 , and electrodes claim 4 , which are laminated claim 4 , the bead supply unit having an inflow part and an outflow part through which metal ion adsorptive beads flow.6. The method of claim 4 , wherein the flow through-continuous deionization (FT-CDI) module allows the adsorptive ball to flow ...

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Номер записи: 11
31-10-2013 дата публикации

PROCESS FOR EXTRACTION OF RARE EARTH ELEMENTS

Номер: US20130283977A1
Автор: Halim M. A., Lakshmanan Vaikuntam I., Sridhar Ramamritham
Принадлежит:

A process for the extraction of rare earth elements, including yttrium, from a rare earth element-bearing ore or concentrate, comprising the steps of leaching the rare earth element-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of from 90° C. to the boiling point of the solution and at an Eh of at least 200 mV. After a liquid/solids separation step, the solution obtained is subjected to steps for removal of iron and for recovery of rare earth elements. Alternatively, rare earth element-bearing ore or concentrate may be leached with sulphuric acid and liquid obtained subjected to extraction of iron and other impurities. Raffinate obtained may be treated with oxalic acid, the precipitate dissolved in hydrochloric acid and subjected to solvent extraction for rare earth elements or the raffinate may be subjected to solvent extraction for removal of rare earth elements and then stripped with hydrochloric acid. 1. A process for the extraction of at least one rare earth element from a rare earth element-bearing ore or concentrate , comprising the steps of:a) leaching the rare earth element-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of from 90° C. to the boiling point of the solution and an Eh of at least 200 mV; andb) subjecting the leach solution so obtained to a liquid/solids separation step.2. The process of in which liquid from step b) is subjected to steps for recovery of at least one rare earth element or yttrium.3. The process of in which the Eh is at least 400 mV.4. The process of in which the rare earth element is selected from at least one rare earth element of atomic number 57-71.5. The process of in which yttrium is recovered.6. A process for the extraction of at least one rare earth element from a rare earth element-bearing ore or concentrate claim 1 , comprising the steps of:a) leaching the ...

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Номер записи: 12
31-10-2013 дата публикации

COMPOSITION FOR COLLECTING METAL COMPONENT

Номер: US20130283978A1
Автор: Date Masakazu, Fujitani Tadahiro, Kageyama Hiroyuki, Nomura Katsuhiro
Принадлежит:

The present invention provides a composition for collecting a metal component from a metal component-containing material, the composition containing a compound containing at least one element selected from the group consisting of lanthanoid elements and elements in group 2 of the periodic table, and a compound containing at least one element selected from the group consisting of elements in groups 3, 4, 12, and 13 of the periodic table and transition metal elements in the 4th period of the periodic table. The present invention further provides a method for collecting a metal component using this composition. With the use of the composition of the present invention, a metal component can be easily and efficiently collected from a material containing a highly useful metal component such as noble or rare metal. 1. A method for collecting one or more metal components from a metal component-containing material , the method comprising heating the metal component-containing material and a composition comprising a compound containing at least one element selected from the group consisting of lanthanoid elements and elements in group 2 of the periodic table and a compound containing at least one element selected from the group consisting of elements in groups 3 , 4 , 12 , and 13 of the periodic table and transition metal elements in the 4th period of the periodic table in such a manner that a metal vapor or metal oxide vapor produced by heating the metal component-containing material is brought into contact with the composition.2. The method according to claim 1 , wherein the metal component-containing material and the composition are placed together in one container and heated.3. The method according to claim 1 , wherein the metal component-containing material is a noble or rare metal component-containing waste material.4. A method for recovering metal claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'collecting one or more metal components by the ...

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Номер записи: 13
31-10-2013 дата публикации

Recovery of Rare Earth Elements and Compounds from Coal Ash

Номер: US20130287653A1
Автор: Green B. David, Joshi Prakash B., Marinelli William J., Preda Dorin V., Skyler David A., Tsinberg Anait
Принадлежит:

Rare earth elements are recovered from coal ash. The coal ash with rare earth elements can be treated with a mineral acid to form an aqueous mineral acid solution. The aqueous mineral acid solution can be extracted to form an organic solution that includes the rare earth salts. The organic solution can be mixed with water to form an aqueous solution that includes the rare earth salts. The rare earth elements are separated from the aqueous solution. 1. A method of recovering rare earth elements from coal ash , the method comprising:treating coal ash that includes rare earth elements with a mineral acid to form an aqueous mineral acid solution;extracting the aqueous mineral acid solution to form an organic solution that includes the rare earth salts;mixing the organic solution with water to form an aqueous solution that includes the rare earth salts; andseparating the rare earth elements from the aqueous solution.2. The method of claim 1 , wherein the mineral acid is nitric acid.3. The method of claim 1 , wherein treating the coal ash further comprises:heating the mineral acid to approximately 90° C.; andexposing the coal ash to the mineral acid for at least one hour.4. The method of claim 3 , wherein exposing the coal ash further comprises additional heating of a resulting solution formed when exposing the coal ash to the mineral acid to generate a more concentrated mixture.5. The method of claim 1 , wherein the extracting the aqueous mineral acid solution further comprises:mixing the aqueous mineral acid solution with tributyl phosphate and kerosene; andremoving the organic solution from the aqueous mineral acid solution such that the rare earth salts are substantially removed along with the organic solution .6. The method of claim 1 , wherein extracting the aqueous mineral acid solution further comprises performing a dry extraction claim 1 , a liquid extraction claim 1 , or any combination thereof.7. The method of claim 6 , wherein the dry extraction is a Soxhlet ...

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Номер записи: 14
14-11-2013 дата публикации

Compositions And Methods Of Using A Ketoxime In A Metal Solvent Extraction Reagent

Номер: US20130302225A1
Автор: Jack BENDER, Michael Virnig, Nathan C. Emmerich
Принадлежит: Cognis IP Management GmbH

Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods.

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Номер записи: 15
21-11-2013 дата публикации

RARE EARTH RECOVERY FROM PHOSPHOR

Номер: US20130309150A1
Автор: Thakur Narayan V.
Принадлежит: REENEWAL CORPORATION

A method is described to produce high purity rare earth oxides of the elements La, Ce, Tb, Eu and Y from phosphor, such as waste phosphor powders originating in various consumer products. One approach involves leaching the powder in two stages and converting to two groups of relatively high purity mixed rare earth oxides. The first group containing Eu and Y is initially separated by solvent extraction. Once separated, Eu is purified using Zn reduction with custom apparatus. Y is purified by running another solvent extraction process using tricaprylmethylammonium chloride. Ce is separated from the second group of oxides, containing La, Ce and Tb by using solvent extraction. Subsequently, La and Tb are separated from each other and converted to pure oxides by using solvent extraction processes. A one-stage leaching process, wherein all rare earths get leached into the solution and subsequently processed, is also described. 1. A method for recovery of a rare earth constituent from a phosphor , the method comprising:leaching a rare earth constituent from a phosphor with a strong acid lixiviant to form a rare earth leachate solution;adjusting the rare earth leachate solution to a pH preferential to the precipitation of rare earth oxalates relative to other metal oxalates, and then precipitating the rare earth constituent from the rare earth leachate solution as one or more rare earth oxalates; andconverting the one or more rare earth oxalates to one or more rare earth oxides.2. The method of claim 1 , wherein the one or more rare earth oxides is greater than 99% pure.3. The method of claim 1 , wherein the phosphor is a powder derived from phosphor waste.4. The method of claim 1 , wherein the pH of the rare earth leachate solution is adjusted to about 2.5. The method of claim 1 , wherein the strong acid lixiviant is HSO.6. The method of claim 1 , wherein the rare earth constituent comprises compounds comprising a rare earth element selected from the group consisting of La ...

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Номер записи: 16
19-12-2013 дата публикации

System and method for rare earths extraction

Номер: US20130336856A1
Автор: Antonio Clareti Pereira, Flavia Dutra Mendes, Joao Alberto Lessa Tude, Tiago Valentim Berni
Принадлежит: Vale SA

It is described a method for recovering rare earth elements from low grade ores including a first metal selected group containing at least one of iron and aluminum and a second metal selected from the group consisting of at least of the rare earth elements (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium and scandium), the method comprising the steps of: (i) contacting the ore with sulfuric acid to obtain sulfates of the first group of metals, (ii) subjecting the mixture to high temperatures in order to convert the first group of sulfates into phosphates or other stable species and the second group into sulfates, (iii) adding water to the cool mixture, selectively dissolving the rare earth elements and (iv) subjecting the rare earth solution to a purification process.

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Номер записи: 17
26-12-2013 дата публикации

DISSOLUTION AND RECOVERY OF AT LEAST ONE ELEMENT NB OR TA AND OF AT LEAST ONE OTHER ELEMENT U OR RARE EARTH ELEMENTS FROM ORES AND CONCENTRATES

Номер: US20130340571A1
Автор: Agin Jerome, Durupt Nicolas, Greco Antoine, Hammy Fatima, LAROCHE GUILLAUME, Thiry Jacques
Принадлежит:

The main subject-matter of the present invention is a process for the dissolution of at least one element chosen from niobium and tantalum and at least one other element chosen from uranium and the rare earth elements, advantageously for the dissolution of niobium, tantalum, uranium and rare earth elements, present in an ore or an ore concentrate. Said process comprises: 1. A process for the dissolution of at least one element chosen from niobium and tantalum and of at least one other element chosen from uranium and rare earth elements , advantageously for the dissolution of niobium , tantalum , uranium and rare earth elements , present in an ore or an ore concentrate , which comprises:the roasting of a material, comprising said elements, which material is mixed, dry or in the presence of water, with an acidic roasting agent in order to obtain a calcine; said material consisting of said ore or concentrate or having been obtained from said ore or said concentrate and said acidic roasting agent providing for roasting in a sulphate medium; andthe dissolution in an aqueous solution of the calcine obtained in order to obtain a slurry, the liquid fraction of which includes iron, in the ferric state, at a concentration of at least 50 g/l, advantageously of at least 70 g/l and very advantageously of at least 120 g/l.2. The process according to claim 1 , wherein the iron present in said slurry was present in said calcine and/or was added claim 1 , at least in part claim 1 , in the liquid and/or solid form claim 1 , to said calcine.3. The process according to claim 1 , wherein the dissolution of the calcine is carried out without any addition of sulphuric acid.4. The process according to claim 1 , wherein the dissolution of the calcine is carried out with addition of a reducing agent claim 1 , such as SO.5. The process according to claim 1 , wherein the roasting claim 1 , a solid/liquid reaction claim 1 , is an acid roasting.6. The process according to claim 1 , wherein the ...

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Номер записи: 18
26-12-2013 дата публикации

Particulate Materials for Uranium Extraction and Related Processes

Номер: US20130343969A1
Автор: Bromberg Lev E., Hatton T. Alan, Klichko Yaroslav
Принадлежит:

Extraction method for recovering metals. Phosphoric acid is contacted with an extractant suspension of solid particulate material comprising a para- or ferromagnetic material core surrounded by an outer shell of a chelating polymer whereby a metal is the solution is adsorbed on the chelating polymer, thereby removing it from the phosphoric acid solution. The metal-containing solid particulate material is magnetically separated from the solution and the metal is stripped from the solid particulate material for reuse. 1. Extraction method for removing metals from an aqueous acid solution , comprising:contacting the aqueous acid solution with an extractant suspension of solid particulate material comprising a para- or ferromagnetic material core surrounded by an outer shell of a chelating polymer whereby a metal in the solution is bound to the chelated polymer, thereby removing it from the acid solution; andmagnetically separating the metal-containing solid particulate material from the solution and stripping the metal from the solid particulate material in a magnetic separation column.2. The method of wherein the metal is uranium.3. The method of wherein the metal is a rare earth metal.4. The method of wherein the metal is a lanthanide.5. The method of wherein the metal is an actinide.6. The method of further including using a stripping solution to produce an alkali form of the metal.7. The method of further including treating the stripping solution to neutralize the alkali to produce an acidic metal solution.8. The method of further including reacting the acidic metal solution with hydrogen peroxide to precipitate a metal peroxide salt.9. The method of further including thickening claim 8 , washing claim 8 , drying and calcining the metal peroxide salt to produce the metal.10. The method of wherein the core is selected from the group consisting of chromium dioxide claim 1 , cobalt claim 1 , and amine-stabilized cobalt.11. The method of wherein the outer shell of ...

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Номер записи: 19
23-01-2014 дата публикации

MODIFIED POLY (STYRENE-CO-MALEIC ANHYDRIDE) AND USES THEREOF

Номер: US20140023570A1
Автор: Klumperman Lubertus, Koch Klaus Robert, Lakay Eugene Marlin
Принадлежит:

A polymeric compound is provided having the general formula (A) wherein R is an alkyl chain preferably having from 1 to 6 carbon atoms in the chain which may be either saturated or unsaturated and may have substituents attached to the chain, and R′ and R″, which may be the same or different from each other and preferably have from 1 to 4 carbon atoms in a chain, are selected from alkyl groups, substituted or unsubstituted, or R′ and R″ are linked to form a saturated or unsaturated cyclic moiety incorporating the adjacent nitrogen atom, with or without additional heteroatoms in the ring. The polymeric compound is preferably in a particulate form and most particularly in the form of nanoparticles. A method of producing the polymers is disclosed. A method of adsorbing, separating and stripping the polymers is also disclosed. 2. A polymeric compound as claimed in in which R is a C1 to C6 alkyl chain and R′ and R″ are selected from C1 to C4 alkyl chains or claim 1 , alternatively claim 1 , R′ and R″ are linked together to form a ring containing additional nitrogen atoms.3. A polymeric compound as claimed in in which R is a propyl chain and R′ and R″ are selected from methyl and ethyl groups.4. A polymeric compound as claimed in any one of the preceding claims in which the polymeric compound of general formula A is in a particulate form.5. A polymeric compound as claimed in in which the polymeric compound of general formula A is in the form of nanoparticles.6. A polymeric compound as claimed in either one of or in which the particles include a superparamagnetic material.7. A method of producing a polymeric compound of the general formula A as claimed in any one of the preceding claims which includes co-polymerising styrene and maleic anhydride to form a styrene-maleic anhydride copolymer and subjecting the copolymer to thermal imidization with a suitably substituted amine in an organic solvent free process to form the corresponding imide.8. A method for the separation of ...

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Номер записи: 20
23-01-2014 дата публикации

METHOD OF RECOVERING RARE EARTHS FROM A SOLID MIXTURE CONTAINING A HALOPHOSPHATE AND A RARE EARTH COMPOUND AND SOLID MIXTURES SUITABLE FOR THIS METHOD

Номер: US20140023571A1
Автор: Braconnier Jean-Jacques, Rollat Alain
Принадлежит: Rhodia Operations

An acid treatment, in a liquid medium, of a solid containing a halophosphate and a rare earth compound is described. Further described, is the addition of a base to the medium obtained previously and separation of a solid phase from a liquid phase; mixing and calcination of the solid obtained previously with an alkaline solid compound; redispersing the calcined product in water, separation of the solid product from the suspension obtained in the preceding step; dispersing this solid in water and acidification of the dispersion and separation of the solid from this dispersion. 1. A method of recovering rare earths from a solid mixture containing at least one halophosphate and at least one compound of one or more rare earths , the method comprising the following steps:(a) carrying out acid treatment of said mixture in a liquid medium;(b) putting a base and the medium obtained after step (a) together so as to raise the pH of said medium to a value of at least 1.5, thus obtaining a first solid phase comprising one or more rare earths at least partly in the form of a phosphate and a first liquid phase comprising at least one alkaline-earth element of halophosphate and wherein the first solid phase is separated from the first liquid phase;(c) mixing the solid from step (b) with an alkaline solid compound and calcining the resultant mixture;(d) redispersing the calcined product from the preceding step in water;(e) separating a second solid phase comprising one or more rare earths at least in the form of a hydroxide and a second liquid phase comprising at least one alkaline element from the suspension obtained at the end of the preceding step;(f) dispersing the solid from the preceding step in water and acidifying the resultant suspension; and(g) separating a third solid phase and a third liquid phase comprising at least one rare earth salt from the suspension obtained at the end of the preceding step.2. The method as defined by claim 1 , wherein a thermal treatment is ...

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Номер записи: 21
06-02-2014 дата публикации

Method For Extraction And Separation Of Lanthanoid Elements And Actinoid Elements, And Means For Extraction And Separation Of Lanthanoid Elements And Actinoid Elements

Номер: US20140033868A1
Автор: Elsafty Sherif, Halada Kohmei
Принадлежит: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Problem: To provide a material and a method for efficient and inexpensive extraction of rare metals that are included in urban minerals. Solution: A method for the extraction of lanthanoid elements and actinoid elements, said method comprising: an adsorption process wherein a metal-dissolved solution containing a target metal selected from lanthanoid elements and actinoid elements is made to come into contact with porous structures that carry metal-adsorbent compounds that are adsorbent to target metal ions so that the target metal ions in said solution are adsorbed by said metal-adsorbent compounds; and a target metal separation process wherein said porous structures are made to come into contact with a back-extraction solution so that the target metal ions that are adsorbed by said metal-absorbent compounds are transported to the back-extraction solution. 1. A method for the extraction of lanthanoid elements and actinoid elements comprising:an adsorption process wherein a metal-dissolved solution containing a target metal selected from the group consisting of a lanthanoid element and an actinoid element is made to come into contact with nanostructures that carry metal-adsorbent compounds that are adsorbent to said target metal so that said target metal in said solution is adsorbed by said metal-adsorbent compounds; anda target metal separation process wherein said nanostructures that carry metal-adsorbent compounds that adsorbed said target metal during said adsorption process are made to come into contact with a back-extraction solution so that said target metal that is adsorbed by said metal-adsorbent compounds is transported to said back-extraction solution.2. The extraction method according to wherein said metal-adsorbent compounds are organic compounds with selective spectroscopic properties to said target metal.3. The extraction method according to wherein said organic compounds are nitrogen-containing aromatic compounds.4. The extraction method according to ...

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Номер записи: 22
06-01-2022 дата публикации

Recovery of rare earth metals from ferromagnetic alloys

Номер: US20220002890A1
Автор: Igor Lubomirsky, Valery Kaplan
Принадлежит: Yeda Research and Development Co Ltd

Methods for recovery of at least one rare earth metal from ferromagnetic alloy are described, and further methods of atomic hydrogen decrepitation of a ferromagnetic alloy.

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Номер записи: 23
07-01-2021 дата публикации

EXTRACTING RARE-EARTH ELEMENTS FROM A GANGUE HEAVY FRACTION

Номер: US20210001350A1
Автор: Elliott W. Crawford, Gardner Daniel Joseph, Malla Prakash, Riley Ed
Принадлежит:

Described herein are technologies for concentrating rare-earth elements from a heavy fraction of grit in gangue produced in kaolin mining. In some examples, grit is separated as a non-clay fraction of gangue produced in a kaolin mining operation. The grit is separated into a heavy mineral grit sub-fraction and a light mineral grit sub-fraction. Rare-earth elements, particularly heavy rare-earth elements, are thereafter extracted from the heavy mineral grit sub-fraction using various extraction technologies. 1. A method of concentrating a rare-earth element , the method comprising:receiving crude clay from a mining operation of a kaolin-bearing formation;separating the crude clay into a grit and a clay fraction, wherein the grit is gangue from the mining operation;separating the grit fraction into a light mineral grit sub-fraction and a heavy mineral grit sub-fraction, wherein the rare-earth element is present in the heavy mineral grit sub-fraction, by placing the grit fraction into a heavy liquid solution having a defined density to cause a fractionation of the grit concentration into the light mineral grit sub-fraction and the heavy mineral grit sub-fraction; andconcentrating the rare-earth element from the heavy mineral grit sub-fraction.2. The method of claim 1 , wherein separating the crude clay into a grit fraction and a clay fraction comprises:crushing the crude clay and mixing the crushed, crude clay with water and a dispersant; andscreening the grit using a 325 mesh sieve (44 microns) to produce the grit fraction, the grit fraction comprising a coarse silt fraction and a sand fraction.3. The method of claim 2 , wherein the dispersant comprises sodium hexametaphosphate solution.4. The method of claim 2 , wherein the dispersant comprises sodium polyphosphate claim 2 , pyrophopshate claim 2 , sodium triphosphate claim 2 , polyacrylate claim 2 , carboxylate claim 2 , sodium silicate claim 2 , tetrasodium pyrophosphate claim 2 , or sodium polyacrylate.5. The ...

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Номер записи: 24
07-01-2016 дата публикации

SELECTIVE EXTRACTION OF CERIUM FROM OTHER METALS

Номер: US20160002751A1
Автор: Kasaini Henry
Принадлежит:

Methods for the extraction of cerium and/or thorium from metal compounds and solutions. A single step or two-step extraction method may be applied to selectively precipitate thorium and/or cerium as hydroxides under controlled pH conditions such that a substantially thorium-free and/or cerium-free rare earth element (REE) solution may be formed, such as for the subsequent separation of individual rare earth elements. 1. A method for the extraction of cerium from a cerium-containing acidic solution , comprising the steps of:contacting the cerium-containing acidic solution with ammonium hydroxide to precipitate at least a portion of the cerium as cerium hydroxide and form a cerium-depleted solution and a cerium hydroxide product; andseparating at least a portion of the cerium hydroxide product from the cerium depleted solution.2. The method recited in claim 1 , wherein the cerium-containing acidic solution is formed by digesting a cerium-containing solid product in an acid.3. The method recited in claim 1 , wherein the cerium-containing acidic solution comprises nitric acid.4. (canceled)5. The method recited in claim 1 , wherein claim 1 , before the step of contacting the cerium-containing acidic solution with ammonium hydroxide claim 1 , the cerium-containing acidic solution has a free acid content that is sufficient to dissolve at least about 95% of the cerium and maintain at least about 95% of the cerium as Ce.6. The method recited in claim 1 , wherein claim 1 , before the step of contacting the cerium-containing acidic solution with ammonium hydroxide claim 1 , the cerium-containing acidic solution has a free acid content of at least about 18%.7. (canceled)8. (canceled)9. The method recited in claim 1 , wherein the step of contacting the cerium-containing acidic solution with ammonium hydroxide comprises contacting the cerium-containing acidic solution with a sufficient amount of ammonium hydroxide to stabilize at least about 95% of the cerium in the liquor as a ...

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Номер записи: 25
02-01-2020 дата публикации

Systems for acid digestion processes

Номер: US20200002784A1
Автор: Darwin Argumedo, Michael Heinrichs, Rachid Taha, Rick Peterson, Slawomir Winecki, Vinay V. Gadkari
Принадлежит: Battelle Memorial Institute Inc

A system for recovering rare earth elements from coal ash includes a leaching reactor, an ash dryer downstream of the leaching reactor, and a roaster downstream of the ash dryer that is cooperatively connected to both the leaching reactor and the ash dryer. Coal ash is mixed with an acid stream such that rare earth elements present in the coal ash are dissolved in the acid stream, thereby creating (i) a leachate containing the rare earth elements and (ii) leached ash. The leachate is heated to obtain acid vapor and an acid-soluble rare earth concentrate. Mixing of the coal ash with the acid stream can occur in a leaching reactor and heating of the leachate can occur in a roaster. The acid-soluble rare earth concentrate can be fed to a hydrometallurgical process to separate and purify the rare earth elements.

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Номер записи: 26
02-01-2020 дата публикации

METHODS FOR RECOVERY OF RARE EARTH ELEMENTS FROM COAL

Номер: US20200002785A1
Автор: Argumendo Darwin, Gadkari Vinay V., Heinrichs Michael, Peterson Rick, Taha Rachid, WINECKI SLAWOMIR
Принадлежит:

Methods of recovering rare earth elements, vanadium, cobalt, or lithium from coal are described. The coal is dissolved in a first solvent to dissolve organic material in the coal and create a slurry containing coal ash enriched with rare earth elements, vanadium, cobalt, or lithium. The enriched coal ash is separated from the first solvent. Residual organic material is removed from the coal ash. The rare earth elements, vanadium, cobalt, or lithium can then be recovered from the coal ash. The coal ash is mixed with an acid stream that dissolves the rare earth elements, thereby creating (i) a leachate containing the rare earth elements and (ii) leached ash. The leachate is heated to obtain acid vapor and an acid-soluble rare earth concentrate. The acid-soluble rare earth concentrate can be fed to a hydrometallurgical process to separate and purify the rare earth elements. 1. A method of recovering rare earth elements from coal , comprising:dissolving coal in a first solvent to dissolve organic material in the coal and create a slurry containing coal ash enriched with rare earth elements;separating the coal ash from the first solvent;removing residual organic material from the coal ash; andrecovering the rare earth elements from the coal ash.2. The method of claim 1 , wherein the first solvent is a bio-based hydrogen transfer solvent.3. The method of claim 1 , wherein the first solvent is soybean oil.4. The method of claim 1 , wherein the residual organic material is removed from the coal ash by washing the coal ash with a second solvent that is different from the first solvent.5. The method of claim 4 , wherein the second solvent is tetrahydrofuran.6. The method of claim 1 , wherein the residual organic material is removed from the coal ash by burning the coal ash at a temperature of about 300° C. to about 600° C.; orwherein the residual organic material is removed from the coal ash by comminution, froth flotation, or gravimetric separation.7. The method of claim 1 , ...

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Номер записи: 27
20-01-2022 дата публикации

Step-Leaching Process of Rare Earth Elements from Ash Materials Using Mild Inorganic Acids at Ambient Conditions

Номер: US20220017992A1
Автор: Lopano Christina L., Stuckman Mengling, Tarka Thomas
Принадлежит:

The invention provides a method for extracting REEs from ash having the steps of contacting ash with a first acid solution to generate leachate having a pH between approximately 5.0 and approximately 5.5; contacting the ash with a second acid solution to generate leachate having a pH between approximately 2.8 and approximately 3.5; and contacting the ash with a third acid solution to generate leachate having a pH between approximately −0.6 and approximately 0.5. The invention also provides a method for leaching REEs from ash having the steps of: contacting ash with a first amount of acid sufficient to leach Ca and AJ from the ash without leaching REEs; contacting the ash with a second amount of acid sufficient to leach REEs from the ash without leaching Fe and Sc; and contacting ash with a third amount of acid sufficient to leach Fe and Sc from the ash. 1. A method for leaching REEs from ash material comprising:contacting an ash material containing REEs with a first acid solution to generate a first leachate having a pH between approximately 5.0 and approximately 5.5;contacting the ash material with a second acid solution to generate a second leachate having a second pH between approximately 2.8 and approximately 3.5; andcontacting the ash material with a third acid solution to generate a third leachate having a third pH between approximately −0.6 and approximately 0.5.2. The method of wherein the first acid solution comprises a solution containing a predetermined amount of a first acid.3. The method of wherein the second acid solution comprises a solution containing a predetermined amount of a second acid.4. The method of wherein the first and second predetermined amounts of acid between approximately 18 and approximately 20 mmol of acid per gram of ash material.5. The method of wherein the first and second predetermined amounts of acid are determined by generating a pH titration curve from a sample of the ash material.6. The method of wherein contacting the ash ...

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Номер записи: 28
12-01-2017 дата публикации

Rare earth material-binding peptide and use thereof

Номер: US20170008926A1
Автор: Nobuhiro Ishida, Takaaki Hatanaka
Принадлежит: Toyota Central R&D Labs Inc

A binding agent is capable of binding to rare earth materials such as rare earths and inorganic compounds thereof. A rare earth material-binding agent includes a peptide capable of binding to a rare earth material including a rare earth and a rare earth inorganic compound.

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Номер записи: 29
14-01-2021 дата публикации

MODIFIED POLYAMINES GRAFTED TO A PARTICULATE, SOLID SUPPORT AS SORBENT MATERIALS FOR REMOVAL OF TARGET SUBSTANCES FROM FLUIDS

Номер: US20210008522A1
Автор: HAGEMANN Henrik, Li Wen, REEH Katharina, REEVE Benjamin David, YOU Amanda Yi Fen
Принадлежит: Puraffinity Ltd.

Provided are compositions for removal of a target substance from a fluid stream, the composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material. Also provided are processes for removal of a target substance from a fluid stream comprising contacting the fluid stream with a composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material. 1. A composition for removal of a target substance from a fluid stream , the composition comprising a polyamine; and a covalently linked hydrophobic group , wherein the polyamine is covalently linked to a support material.2. The composition of claim 1 , wherein the support material is comprised of a material selected from one or more of the group consisting of: lignocellulose; bacterial cellulose; microcrystalline cellulose; microfibrillated cellulose and a cellulose derivative.3. The composition of claim 2 , wherein the support material comprises a cellulose or lignocellulose powder or pulp.4. The composition of claim 3 , wherein the cellulose or lignocellulose powder or pulp is incorporated into a membrane or membrane-like filter.5. The composition of claim 1 , wherein the support material is selected from one or more of the group consisting of: silica; silica gel; and a silica derivative.6. The composition of any one of claim 1 , or claim 1 , wherein the support material is porous claim 1 , solid claim 1 , and particulate claim 1 , preferably wherein the average diameter size of the particles is greater than about 0.01 mm claim 1 , and less than about 1 mm.7. The composition of claim 6 , wherein the particulate form comprises one or more of the group consisting of a plurality of: granules; flakes; beads; pellets; and pastilles.8. The composition of any one of to claim 6 , wherein the polyamine is selected from a linear or branched polyamine.9. The composition of claim 8 ...

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Номер записи: 30
14-01-2016 дата публикации

METHOD FOR SEPARATING IMPURITIES FROM AN ACIDIC SOLUTION CONTAINING NICKEL AND COBALT AND/OR SCANDIUM

Номер: US20160010177A1
Автор: Baba Yuzo, Goto Masahiro, HAYATA Jiro, Higaki Tatsuya, Kubota Fukiko, Matsumoto Shinya, Nagakura Toshihiko, Ozaki Yoshitomo
Принадлежит:

Provided is a method for efficiently separating nickel, cobalt and/or scandium, and impurities from an acidic solution containing impurities such as manganese, iron, zinc, and aluminum. A valuable-metal extracting agent of the present invention is expressed by general formula (1). In the formula, Rand Reach represent the same or different alkyl groups, Rrepresents a hydrogen atom or an alkyl group, and Rrepresents a hydrogen atom or a given group, other than an amino group, that bonds with an α carbon as an amino acid. In general formula (1), the inclusion of a glycine unit, a histidine unit, a lysine unit, an asparagine acid unit, or a normal methylglycine unit is preferred. 2. The method according to claim 1 , wherein the amide derivative is any one or more of glycinamide derivatives claim 1 , histidinamide derivatives claim 1 , lysinamide derivatives claim 1 , aspartamide derivatives claim 1 , and N-methylglycine derivatives.3. The method according to claim 1 , whereinthe acid solution contains nickel and zinc, andthe acid solution is subjected to the solvent extraction with the pH of the acid solution adjusted to a range of 2.0 or higher to 4.3 or lower.4. The method according to claim 1 , whereinthe acid solution contains nickel and iron,when the iron is trivalent iron, the acid solution is subjected to the solvent extraction with the pH of the acid solution adjusted to a range of 1.0 or higher to 3.2 or lower, andwhen the iron is divalent iron, the acid solution is subjected to the solvent extraction with the pH of the acid solution adjusted to a range of 2.0 or higher to 4.5 or lower.5. The method according to claim 1 , whereinthe acid solution contains cobalt and iron,when the iron is trivalent iron, the acid solution is subjected to the solvent extraction with the pH of the acid solution adjusted to a range of 1.0 or higher to 4.0 or lower, andwhen the iron is divalent iron, the acid solution is subjected to the solvent extraction with the pH of the acid ...

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Номер записи: 31
14-01-2016 дата публикации

ADSORBENT FOR RARE EARTH ELEMENT AND METHOD FOR RECOVERING RARE EARTH ELEMENT

Номер: US20160010178A1
Автор: Ogata Takeshi, TANAKA Mikiya
Принадлежит: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

An adsorbent for rare earth element and a method for recovering a rare earth element, in which a rare earth element contained in an aqueous solution can be simply and inexpensively adsorbed and recovered, and a rare earth element present in an aqueous solution in combination with a base metal can be selectively adsorbed and recovered. The adsorbent includes a base material and diglycolamic acid introduced into the base material. The method for recovering a rare earth element includes steps of: bringing an aqueous solution containing a rare earth element into contact with the adsorbent for rare earth element to allow the rare earth element to be adsorbed on the adsorbent for rare earth element; and desorbing the rare earth element adsorbed on the adsorbent for rare earth element with an acid of 1 N or less. 1. An adsorbent for rare earth element which is located in an aqueous phase and brought into contact with an aqueous solution containing a rare earth element to adsorb and recover the rare earth element ,the adsorbent comprising a base material and diglycolamic acid introduced into the base material.2. The adsorbent for rare earth element according to claim 1 , wherein the diglycolamic acid has been introduced into the base material by allowing diglycolic acid or diglycolic anhydride to react with a carrier having a primary amine and/or a secondary amine on the base material.3. The adsorbent for rare earth element according to claim 2 , wherein the carrier is one selected from among poly(allylamine) claim 2 , polyethyleneimine claim 2 , and chitosan.4. The adsorbent for rare earth element according to claim 1 , wherein the base material is polyethylene or polypropylene.5. The adsorbent for rare earth element according to claim 1 , wherein the base material is silica.6. The adsorbent for rare earth element according to claim 2 , wherein the base material is silica claim 2 , and the primary amine and/or the secondary amine is alkylamine.7. A method for recovering a ...

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Номер записи: 32
14-01-2021 дата публикации

PURIFICATION OF QUARTZ POWDERS BY REMOVAL OF MICROPARTICLES OF REFRACTORY MATERIALS

Номер: US20210009461A1
Автор: Sayce Ian George, Schildt Fabian, Schindler Michael, Visnow Eduard
Принадлежит:

Described is a process for the refinement of a quartz powder, comprising the step of separating microparticles of refractory minerals, in particular minerals containing rare earth metal compounds, from the quartz powder by an elutriation step. 1. A process for the refinement of a quartz powder , comprising separating microparticles of refractory minerals out of the quartz powder by an elutriation step , wherein the microparticles of refractory minerals comprise minerals containing rare earth metals and/or thorium and/or uranium; andcarrying out the elutriation step in a fluidised bed reactor, in which a controlled upward flow of a liquid elutriation phase is provided, by which the microparticles of refractory minerals are carried upwards in the fluidised bed reactor;whereas the quartz powder remains in the lower region of the fluidised bed reactor.2. The process according to claim 1 , wherein the microparticles of refractory minerals carried upwards in the fluidised bed are either discharged out of the fluidised bed reactor or are separated from the liquid elutriation phase.3. The process according to claim 2 , wherein the liquid elutriation phase is recycled into the elutriation step and the microparticles of refractory minerals contained therein are separated from the elutriation phase by filtration.4. The process according to claim 3 , wherien the microparticles of refractory minerals are separated from the elutriation phase by filtration using a filter with a filter having a pore size of 0.7 μm or less.5. The process according to claim 4 , wherein the filter is an acid-resistant filter.6. The process according to claim 1 , wherein the separation of the microparticles of refractory minerals from the quartz powder is facilitated by means of ultrasonic agitation before or during elutriation.7. The process according to claim 1 , wherein the elutriation step is carried out before or after a calcination and/or hot chlorination step.8. The process according to claim 1 ...

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Номер записи: 33
19-01-2017 дата публикации

Recovering rare earth metals from magnet scrap

Номер: US20170016088A1
Автор: McCallum Ralph W., Ott Ryan T.
Принадлежит:

A method is provided for treating a rare earth metal-bearing scrap material by melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of the light rare earth metal content and the heavy rare earth metal content as a metallic extractant alloy, which can be subjected to vacuum distillation or sublimation to recover the rare earth metal(s). The method can be practiced to recover the light rare earth metal content and the heavy rare earth metal content concurrently in a one-step process or separately and sequentially in a two-step process. 1. A method of treating a rare earth metal-bearing scrap material , comprising melting an extractant selected from the group consisting of bismuth (Bi) and lead (Pb) and contacting the melted extractant and the scrap material at a temperature and time to recover at least one of a light rare earth metal content and a heavy rare earth metal content of the scrap material as part of a metallic extractant alloy.2. The method of wherein the light rare earth metal content and the heavy rare earth metal content are recovered concurrently in a one-step process.3. The method of wherein the light rare earth metal content and the heavy rare earth metal content are recovered separately in sequence in different extractants in a two-step process.4. The method of wherein the extractant comprises at least 50% by weight Bi.5. The method of wherein the extractant comprises at least 75% by weight Bi.6. The method of wherein the extractant comprises at least 98% by weight Bi.7. The method of wherein the extractant comprises Bi in the temperature range of greater than 271 degrees C. to 1300 degrees C.8. The method of wherein the extractant alloy comprises at least one of the light rare earth metal content and the heavy rare earth metal content and at least one of Bi and Pb.9. The method of wherein the rare earth ...

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Номер записи: 34
21-01-2016 дата публикации

SYSTEMS AND METHODS FOR SEPARATING AND RECOVERING RARE EARTHS

Номер: US20160017459A1
Автор: Bonificio William Daley, Clarke David
Принадлежит:

The present application is generally directed to separation and recovery of rare earths using biomass, liposomes, and/or other materials. In some embodiments, a composition comprising rare earths is exposed to biomass, where some of the rare earths are transferred to the biomass, e.g., via absorption. The composition may then be separated from the biomass. A solution may be exposed to the biomass, such that some of the rare earths are released from the biomass into the solution, thereby enriching the solution in one or more rare earths, relative to other rare earths in the biomass. The solution and the biomass may then be separated, and the rare earths recovered from the solution. In some cases, this process may be repeated with different solutions, e.g., having differences in pH or ionic concentration, which may result in different solutions enriched in various rare earths. In addition, in some embodiments, similar processes may be used to separate the rare earths from thorium and uranium. Also, in some embodiments, liposomes may be used instead of and/or in addition to biomass.

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Номер записи: 35
17-01-2019 дата публикации

METHOD FOR SEPARATING METAL COMPONENTS

Номер: US20190017144A1
Автор: Awazu Tomoyuki, Majima Masatoshi, OISHI Tetsuo, TSUBOKURA Mitsutaka
Принадлежит:

A method for separating metal components from a treatment material containing a silicate and metal elements includes: a reaction step of reacting the treatment material and a molten alkali hydroxide in which bubbles due to water vapor derived from water are generated by heating a hydroxide of an alkali metal or an alkaline-earth metal and the water in a state where the hydroxide and the water coexist, to obtain a reaction product; and a first precipitation step of dissolving the reaction product of the treatment material and the molten alkali hydroxide after the reaction step in water, thereby generating a precipitate containing the metal elements. 1. A method for separating metal components derived from metal elements , from a treatment material containing a silicate and the metal elements , the method comprising:a reaction step of reacting the treatment material and a molten alkali hydroxide in which bubbles due to water vapor derived from water are generated by heating a hydroxide of an alkali metal or an alkaline-earth metal and the water in a state where the hydroxide and the water coexist, to obtain a reaction product; anda first precipitation step of dissolving the reaction product of the treatment material and the molten alkali hydroxide after the reaction step in water to generate a precipitate containing the metal elements in an obtained solution.2. The method for separating the metal components according to claim 1 , wherein the hydroxide and the water are heated at a heating rate of 7° C./min or higher in the reaction step.3. The method for separating the metal components according to claim 1 , wherein the hydroxide and the water are heated at a heating rate of 15° C./min or higher in the reaction step.4. The method for separating the metal components according to claim 1 , wherein the hydroxide and the water are heated at a heating rate of 100° C./min or higher in the reaction step.5. The method for separating the metal components according to claim 1 , ...

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Номер записи: 36
17-01-2019 дата публикации

SEPARATION METHOD OF RARE EARTH ELEMENT AND IRON AND RARE EARTH ELEMENT-CONTAINING SLAG

Номер: US20190017147A1
Автор: Mirvaliev Rinat, Okada Satoshi, Wiraseranee Chompunoot
Принадлежит:

The present invention provides a separation method of a rare earth element and iron including: forming alkali silicate slag incorporating a rare earth element, by melting a rare earth-iron-containing material together with an alkali silicate flux in a metallic silicon melt or an iron-silicon alloy melt; and separating rare earth-containing slag from an iron-silicon alloy, in which volatilization of alkaline components contained in the flux is suppressed by performing heating and melting under an oxidizing atmosphere, and the rare earth-containing slag having a SiO/NaO molar ratio of 2.1 or less is formed. 1. A separation method of a rare earth element and iron , comprising:forming alkali silicate slag (referred to as rare earth-containing slag) incorporating a rare earth element, by melting a treatment object containing a rare earth element and iron (referred to as a rare earth-iron-containing material) together with an alkali silicate flux in a metallic silicon melt or an iron-silicon alloy melt; andseparating the rare earth-containing slag from an iron-silicon alloy,{'sub': 2', '2, 'wherein volatilization of alkaline components contained in the flux is suppressed, by performing heating and melting under an oxidizing atmosphere, to form the rare earth-containing slag having a SiO/NaO molar ratio of 2.1 or less.'}2. The separation method of a rare earth element and iron according to claim 1 ,wherein the rare earth-containing slag is formed by suppressing a volatilization rate of the alkaline components from the alkali silicate flux to be 25.5% or lower.3. The separation method of a rare earth element and iron according to claim 1 ,{'sub': 2', '2', '2, 'wherein the rare earth-containing slag, in which the SiO/NaO molar ratio is 2.1 or less and a SiOcontent is 50 wt % or less, is formed by suppressing a volatilization rate of Na to be 25.5% or lower, by using sodium silicate as the alkali silicate flux.'}4. The separation method of a rare earth element and iron ...

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Номер записи: 37
21-01-2021 дата публикации

SYSTEMS AND PROCESSES FOR RECOVERY OF HIGH-GRADE RARE EARTH CONCENTRATE FROM ACID MINE DRAINAGE

Номер: US20210017625A1
Автор: Noble Aaron, VASS Chris, ZIEMKIEWICZ Paul
Принадлежит:

In one aspect, the disclosure relates to a continuous process for treating acid mine drainage while simultaneously recovering a high-grade rare earth preconcentrate suitable for extraction of commercially valuable rare earth oxides. In a further aspect, the preconcentrate is from about 0.1% to 5% rare earth elements on a dry weight basis. In another aspect, the disclosure relates to a method for processing the preconcentrate to generate a pregnant leach solution that does not form gels or emulsions and is suitable for processing via solvent extraction. In another aspect, the disclosure relates to a system and plant for carrying out the disclosed process. In still another aspect, the disclosure relates to a composition containing rare earth elements produced by the process disclosed herein. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure. 2. The method of claim 1 , wherein the raw material is raw acid mine drainage (AMD) claim 1 , an AMD precipitate (AMDp) claim 1 , or an enriched AMD precipitate (eAMDp).3. The method of claim 1 , wherein contacting the raw material with the first base changes the pH of the aqueous phase to from about 4.0 to about 4.5.4. The method of claim 1 , wherein the first base comprises NaOH claim 1 , KOH claim 1 , ammonia claim 1 , ammonium hydroxide claim 1 , calcium pellets claim 1 , quicklime claim 1 , lime slurry claim 1 , or a combination thereof.5. The method of claim 1 , wherein contacting the aqueous phase with the second base changes the pH of the aqueous phase to from about 8.0 to about 8.5.6. The method of claim 1 , wherein the second base comprises NaOH claim 1 , KOH claim 1 , ammonia or an ammonium compound claim 1 , calcium pellets claim 1 , quicklime claim 1 , lime slurry claim 1 , or a combination thereof.7. The method of claim 1 , wherein the contacting the REE-enriched preconcentrate with the acid changes the pH of the ...

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Номер записи: 38
22-01-2015 дата публикации

HIGH STRENGTH AND HIGH TOUGHNESS METAL AND METHOD OF PRODUCING THE SAME

Номер: US20150023836A1
Автор: Kawamura Yoshihito, YAMASAKI Michiaki
Принадлежит:

This invention provides a high-strength and high-toughness metal which has strength and toughness each high enough to be put to practical use in expanded applications of magnesium alloys, and a process for producing the same. The high-strength and high-toughness metal is a magnesium alloy comprising a crystal structure containing an hcp-structure magnesium phase and a long-period layered structure phase. At least a part of the long-period layered structure phase is in a curved or flexed state. The magnesium alloy comprises a atomic % of Zn and b atomic % of Gd with the balance consisting of Mg. 128-. (canceled)29. A high strength and high toughness metal comprising a magnesium alloy having a crystal structure having an hcp-Mg phase and a long-period stacking ordered structure phase ,wherein at least a part of said long-period stacking ordered structure phase exists in a lamellar form with a 2H structure Mg phase, [{'br': None, 'i': '≦a≦', '0.25.0;\u2003\u2003(1)'}, {'br': None, 'i': '≦b≦', '0.55.0; and\u2003\u2003(2)'}, {'br': None, 'i': a−', 'b., '0.50.5≦\u2003\u2003(3)'}], 'wherein said magnesium alloy contains Zn in an amount of “a” atomic % and of at least one element selected from the group consisting of Gd, Tb, Tm and Lu in a total amount of “b” atomic %, wherein “a” and “b” satisfy the following expressions (1) to (3)3032-. (canceled)33. The high strength and high toughness metal according to claim 29 , [{'br': None, 'i': '≦c≦', '03.0;\u2003\u2003(4)'}, {'br': None, 'i': '≦d≦', '02.0; and\u2003\u2003(5)'}, {'br': None, 'i': '≦b+c+d≦', '0.56.0.\u2003\u2003(6)'}], 'wherein said magnesium alloy contains at least one element selected from the group consisting of Yb, Sm and Nd in a total amount of “c” atomic % and at least one element selected from the group consisting of La, Ce, Pr, Eu and Mm in a total amount of “d” atomic %, wherein “c” and “d” satisfy the following expressions (4) to (6)3442-. (canceled)43. The high strength and high toughness metal according ...

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Номер записи: 39
26-01-2017 дата публикации

Separation of terbium(iii,iv) oxide

Номер: US20170022071A1
Автор: Anja-Verena Mudring, Denis Prodius
Принадлежит: Iowa State University Research Foundation ISURF

Various embodiments relate to separation of terbium(III,IV) oxide. In various embodiments, present invention provides a method of separating terbium(III,IV) oxide from a composition. The method can include contacting a composition including terbium(III,IV) oxide and one or more other trivalent rare earth oxides with a liquid including acetic acid to form a mixture. The contacting can be effective to dissolve at least some of the one or more other trivalent rare earth oxides into the liquid. The method can include separating undissolved terbium(III,IV) oxide from the mixture, to provide separated terbium(III,IV) oxide.

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Номер записи: 40
28-01-2016 дата публикации

A method for re-extraction of rare-earth metals from organic solutions and preparing concentrate of rare-earth metals

Номер: US20160024616A1
Автор: Evtushenko Aleksey Vladimirovich, Genkin Mikhail Vladimirovich, Komkov Aleksey Aleksandrovich, Safiulina Alfiya Minerovna, Shvetsov Sergey Vladimirovich, Spiridonov Vasiliy Sergeevich
Принадлежит: OPENED JOINT STOCK COMPANY "UNITED CHEMICAL COMPANY URALCHEM"

The present invention relates to a method for recovery of rare earth metals (REM) from diluted aqueous acidic solutions comprising steps of liquid-phase extraction of REM into an organic phase and re-extraction of REM from the organic phase. The re-extraction is carried out by precipitation of REM as a solid phase in the form of a poorly soluble salt of a strong acid (pK<0). Recovery of REM into the concentrate is up to 99% in the course of one stage of the re-extraction. 1. A method for recovery of rare earth metals (REM) from diluted aqueous acidic solution comprising:liquid-phase extraction of REM into an organic phase and re-extraction of REM from the organic phase;{'sub': 'a', 'wherein the re-extraction is carried out by precipitation of REM as a solid phase in the form of a poorly soluble salt of a strong acid (pK<0).'}2. The method of claim 1 , wherein an extractant used as the organic phase is chosen from a group consisting of phosphine oxide in kerosene claim 1 , tributylphosphate in kerosene claim 1 , di-(2-ethylhexyl)phosphoric acid (DEHPA).3. The method of claim 1 , wherein the poorly soluble salt of REM is REM sulphates.4. The method of claim 1 , wherein the re-extraction of REM compounds is carried out with sulphuric acid claim 1 , a mixture of HSOwith HCl or HNO claim 1 , a mixture of M(HSO)with HSOand HCl or HNO claim 1 , where M is Na claim 1 , K claim 1 , Mg or REM atom.5. The method of claim 4 , wherein 30-70% aqueous solution of sulphuric acid is used for the re-extraction.6. The method of claim 1 , wherein the ratio between organic phase and aqueous phase is 500:1 to 1:2.7. The method of claim 2 , wherein the extractant after REM re-extraction is washed with calcium salt solution claim 2 , preferably with raffinate of REM extraction. This patent application is a national phase filing under section 371 of PCT/RU2013/000990, filed Nov. 8, 2013, which claims the priority of Russian patent application 2013109742, filed Mar. 5, 2013, each of which is ...

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Номер записи: 41
28-01-2016 дата публикации

METHODS FOR GAS-PHASE THERMOCHROMATOGRAPHIC SEPARATIONS OF FISSION AND ACTIVATION PRODUCTS

Номер: US20160024617A1
Автор: Auxier, Hall Howard L., Hanson Daniel, II John D., Marsh Matthew L.
Принадлежит:

Methods are provided for characterizing samples containing chemical elements such as rare earth elements, actinides, and heavy transition metals by treating the samples to form volatile complexes of the elements (e.g., β-diketonate complexes or other organic ligand complexes of the elements) and then analyzing the complexes, for example, via gas-phase thermochromatography. Also provided are methods for separating and/or recovering such chemical elements. The methods produce less waste and can be performed more rapidly than conventional liquid extraction methods and can provide separated elements of high purity (e.g., 99.9999% purity). 1. A method for characterizing a sample comprising a compound or compounds comprising atoms of one or more chemical elements , wherein each of said one or more chemical elements is selected from the group consisting of a rare earth element , uranium (U) , thorium (Th) , an actinide , and a heavy transition metal; the method comprising:(a) providing a sample comprising a compound or compounds comprising atoms of said one or more chemical elements;(b) forming a complex of each of said one or more chemical elements, wherein the complex comprises a ligand and one of said one or more chemical elements;(c) volatizing the complex of each of said one or more chemical elements; and(d) determining the identity of the one or more chemical elements, wherein the determining for each of the one or more chemical elements is based upon a retention time of a volatized complex on a gas chromatography column or upon a temperature of volatilization of a complex.2. The method of claim 1 , wherein the sample comprises an oxide of each of the one or more chemical elements.3. The method of claim 1 , wherein each of the one or more chemical elements is a rare earth element selected from the group consisting of cerium (Ce) claim 1 , dysprosium (Dy) claim 1 , erbium (Er) claim 1 , europium (Eu) claim 1 , gadolinium (Gd) claim 1 , holmium (Ho) claim 1 , lanthanum ...

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Номер записи: 42
25-01-2018 дата публикации

METHOD FOR RECOVERING SCANDIUM

Номер: US20180023168A1
Автор: Asano Satoshi, Higaki Tatsuya, Kobayashi Hiroshi, Nagai Hidemasa, Yamaguma Ryoma
Принадлежит:

Provided is a method for recovering scandium with which scandium can be efficiently recovered as high purity scandium oxide from a scandium-containing solution containing impurities such as iron without causing problems such as increased cost and safety problems. According to the method for recovering scandium according to the present invention, the pH of a solution containing scandium and iron (scandium-containing solution) is adjusted within the range of not less than −0.5 and less than 1, then scandium oxalate is obtained by adding the pH adjusted solution to an oxalic acid solution, and the scandium oxalate is roasted into scandium oxide. 1. A method for recovering scandium , comprising:adjusting a pH of a solution containing scandium and iron (scandium-containing solution) to a range between −0.5 or more and less than 1;adding the solution after the pH adjustment to an oxalic acid solution having a pH of between −0.5 and less than 1 to obtain scandium oxalate; androasting the scandium oxalate to convert the scandium oxalate into scandium oxide.2. The method for recovering scandium according to claim 1 , wherein the scandium-containing solution is obtained by subjecting a solution containing scandium to an ion exchange treatment and a solvent extraction treatment. The present invention relates to a method for recovering scandium. More specifically, the present invention relates to a method for recovering scandium from a solution containing scandium and iron as high purity scandium oxide.Scandium is an extremely valuable element as it is used as a high strength alloy by being added to aluminum or magnesium or as a stabilizer in the electrolyte of a fuel cell using zirconium.Scandium has a particularly small ionic radius among the rare earth elements, and it has been thus known to be scarcely present in ordinary rare earth minerals but present in trace amounts in oxide ores of aluminum, tin, tungsten, zirconium, iron, nickel, and the like. However, scandium has ...

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Номер записи: 43
24-01-2019 дата публикации

AGENT FOR SELECTIVE METAL RECOVERY, METAL RECOVERY METHOD, AND METAL ELUTION METHOD

Номер: US20190024209A1
Автор: MINODA Ayumi
Принадлежит:

The agent for selective metal recovery of the present invention includes a material derived from an alga belonging to the order Cyanidiales, which is dead cells or a cell surface layer of an alga belonging to the order Cyanidiales, or an artificial material produced by simulating the cell surface layer, or includes a porphyrin. The metal recovery method of the present invention includes an addition step of adding a material derived from an alga belonging to the order Cyanidiales, which is dead cells or a cell surface layer of an alga belonging to the order Cyanidiales, or an artificial material produced by simulating the cell surface layer, or adding a porphyrin, to a metal solution; and a recovery step of recovering a metal from the metal solution by the material derived from an alga belonging to the order Cyanidiales or the porphyrin. 1. An agent for selective metal recovery , the agent comprising a material derived from an alga belonging to the order Cyanidiales , which is dead cells or a cell surface layer of an alga belonging to the order Cyanidiales , or an artificial material produced by simulating the cell surface layer , or comprising a porphyrin.2. The agent for selective metal recovery according to claim 1 , wherein the porphyrin is coproporphyrin and/or pheophytin.3. The agent for selective metal recovery according to claim 1 , wherein the porphyrin is a protonated compound.4. The agent for selective metal recovery according to claim 1 , wherein the agent selectively recovers a noble metal and/or a rare metal including a rare earth element.5. The agent for selective metal recovery according to claim 1 , wherein the agent selectively recovers a noble metal including gold or palladium claim 1 , and/or a lanthanoid from a base metal mixture solution under acidic conditions.6. The agent for selective metal recovery according to claim 5 , wherein the agent separates and selectively recovers a lanthanoid and iron based on the difference between the ionic radii ...

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Номер записи: 44
24-01-2019 дата публикации

METHOD FOR RECOVERING SCANDIUM

Номер: US20190024213A1
Автор: Higaki Tatsuya, Kobayashi Hiroshi, Matsumoto Shin-ya, Nagai Hidemasa
Принадлежит:

The method for recovering scandium pertaining to the present invention has: a first neutralization step for passing a solution containing scandium over an ion exchange resin, adding a neutralizing agent to the eluent eluted from the ion exchange resin and performing a neutralization treatment, and obtaining a primary neutralized sediment and a primary neutralized filtrate by solid-liquid separation; a second neutralization step for further adding a neutralizing agent to the primary neutralized filtrate and performing a neutralization treatment, and obtaining a secondary neutralized sediment and a secondary neutralized filtrate by solid-liquid separation; a hydroxide dissolution step for adding acid to the secondary neutralized sediment and obtaining a hydroxide solution; a solvent extraction step for subjecting the hydroxide solution to solvent extraction; and a scandium recovery step for recovering scandium oxide from a raffinate separated in the solvent extraction step. 1. A method of recovering scandium , comprising:a first neutralization step of allowing a solution containing scandium to pass through an ion exchange resin, adding a neutralizing agent to an eluate eluted from the ion exchange resin, performing a neutralization treatment, and obtaining a primary neutralized precipitate and a primary neutralized filtrate by solid-liquid separation;a second neutralization step of further adding a neutralizing agent to the primary neutralized filtrate, performing a neutralization treatment, and obtaining a secondary neutralized precipitate and a secondary neutralized filtrate by solid-liquid separation;a hydroxide dissolution step of adding an acid to the secondary neutralized precipitate to obtain a hydroxide solution;a solvent extraction step of subjecting the hydroxide solution to solvent extraction; anda scandium recovery step of recovering scandium oxide from a raffinate liquid separated in the solvent extraction step,wherein the secondary neutralized ...

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Номер записи: 45
28-01-2021 дата публикации

RARE EARTH EXTRACTION APPARATUS AND METHOD OF USE THEREOF

Номер: US20210025025A1
Автор: Amato Mark R., Lee W. Davis
Принадлежит:

The invention comprises an apparatus and method of use thereof for generating a rare earth from a rare earth oxide, comprising the steps of: (1) dissociating the rare earth oxide and hydrogen gas in a reaction chamber by inductively heating the reaction chamber to greater than 2000° K to form the associated rare earth and water vapor in a reaction process; (2) driving the reaction process forward by removing the water vapor from the reaction chamber by condensing and freezing the water vapor on a first cold trap surface as water ice, where the reaction comprises: REO+3H→2RE+3HO, where REO is a rare earth oxide and RE comprises a rare earth in the rare earth oxide; and/or () monitoring the reaction process by monitoring generation of at least one of the rare earth and the water in a control system designed for continuous/semi-continuous operation. 1. A method for generating a rare earth from a rare earth oxide , comprising the steps of:dissociating the rare earth oxide and hydrogen gas in a reaction chamber by inductively heating the reaction chamber to greater than 2000° K to form the rare earth and water vapor in a reaction process;driving the reaction process forward by removing the water vapor from the reaction chamber by condensing and freezing the water vapor on a first cold trap surface as water ice, according to Le Chatelier's principle.2. The method of claim 1 , said reaction process comprising:{'br': None, 'sub': 2', '3', '2', '2, 'REO+3H→2RE+3HO'}where REO is a rare earth oxide and RE comprises a rare earth in the rare earth oxide, where the rare earth comprises at least one of: cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb), and yttrium (Y).3. The method of claim 1 , further comprising the steps of:weighing the cold trap surface to determine mass of water ice ...

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Номер записи: 46
28-01-2021 дата публикации

Rare earth oxide to rare earth extraction apparatus and method of use thereof

Номер: US20210025027A1
Автор: Mark R. Amato, W. Davis Lee
Принадлежит: Individual

The invention comprises a method and apparatus for generating a rare earth from a rare earth oxide, comprising the sequential steps of: (1) reducing temperature about the rare earth oxide to less than zero degrees Celsius; (2) reducing pressure to boil off contaminant water in a powder sample of the rare earth oxide at a molecular escape velocity not disturbing the powdered rare earth oxide; and (3) heating the rare earth oxide to greater than 1000° C. in the presence hydrogen gas while optionally: (1) collecting and determining mass of a water product to determine a consumption mass of the starting hydrogen gas in a main reaction process using the equation RE2O3+3H2→2RE+3 H2O, wherein “RE” comprises at a rare earth and (2) injecting replacement hydrogen gas into the main reaction chamber up to the consumption mass.

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Номер записи: 47
04-02-2016 дата публикации

Method for selectively recovering the rare earths from an aqueous acid sulfate solution rich in aluminum and phosphates

Номер: US20160032419A1
Автор: Maxime Vincec
Принадлежит: Eramet SA

The present invention relates to a process for the selective recovery of the rare earth metals from an acidic aqueous sulfate solution comprising phosphates, aluminum and heavy rare earth metals, and possibly medium rare earth metals, iron(II) and titanium, characterized in that it comprises the following successive stages: a) neutralization at a pH of between 3 and 4 of an acidic aqueous sulfate solution comprising phosphates, aluminum and heavy rare earth metals, and possibly medium rare earth metals, iron(II) and titanium, the solution having a molar ratio Al/P>1 and a concentration of sulfates>100 g/l, by addition of a base, so as to precipitate the phosphate and the aluminum and the possible titanium, b) liquid/solid separation between the precipitate formed by the phosphate and the aluminum and the possible titanium and the aqueous sulfate solution, c) recovery of the aqueous sulfate solution, d) addition of phosphates to the aqueous sulfate solution obtained in stage c) such that the molar ratio of the solution obtained PO 4 /REs>4, so as to precipitate the heavy rare earth metal phosphates and the possible medium rare earth metal phosphates, e) liquid/solid separation between the precipitate formed by the heavy rare earth metal phosphates and the possible medium rare earth metal phosphates and the aqueous sulfate solution, f) recovery of the precipitate formed by the heavy rare earth metal phosphates and the possible medium rare earth metal phosphates.

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Номер записи: 48
04-02-2016 дата публикации

A method for concentrating rare-earth metals in phosphogypsum

Номер: US20160032423A1
Автор: Evtushenko Aleksey Vladimirovich, Genkin Mikhail Vladimirovich, Komkov Aleksey Aleksandrovich, Safiulina Alfiya Minerovna, Shvetsov Sergey Vladimirovich, Spiridonov Vasiliy Sergeevich
Принадлежит: OPENED JOINT STOCK COMPANY UNITED CHEMICAL COMPANY URALCHEM

The present invention relates to a method for producing rare-earth metals (REM) compounds by complex processing of apatite, in particularly to a method for concentrating rare-earth metals (REM) in phosphogypsum, where to a process of decomposition of the REM containing raw phosphate material with sulphuric acid, a sodium salt in the amount of 0.25-5.0 kg in terms of NaO or a potassium salts in the amount of 0.25-5.0 kg in terms of KO or a mixture thereof in the amount of 0.25-5 kg in terms of NaO and KO to 1 kg of REM (in terms of LnOpresent in raw phosphate material) is added. The yield of REM transfer into phosphogypsum is up to 98%. 1. A method for concentrating rare-earth metals (REM) in phosphogypsum , the method comprising:{'sub': 2', '2', '2', '2', '2', '3, 'a process of decomposition of the REM containing raw phosphate material with sulphuric acid, a sodium salt in the amount of 0.25 kg to 5.0 kg in terms of NaO or a potassium salts in the amount of 0.25 kg to 5.0 kg in terms of KO or a mixture thereof in the amount of 0.25 kg to 5 kg in terms of NaO and KO to 1 kg of REM (in terms of LnOpresent in raw phosphate material) is added.'}2. The method of claim 1 , wherein sulphate claim 1 , chloride or nitrate of sodium or potassium or a mixture thereof is used as the sodium and/or potassium salt. This patent application is a national phase filing under section 371 of PCT/RU2013/000988, filed Nov. 8, 2013, which claims the priority of Russian patent application 2013111926, filed Mar. 18, 2013, each of which is incorporated herein by reference in its entirety.The present invention relates to technologies for producing rare-earth metal (REM) compounds during complex processing of apatite. In some embodiments, the present disclosure provides methods for concentrating rare-earth metals in phosphogypsum and purification of wet process phosphoric acid from REM.Tens of millions of tons of phosphorus-containing minerals, such as apatite, rock phosphate, etc., are ...

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Номер записи: 49
01-02-2018 дата публикации

SCANDIUM-CONTAINING MASTER ALLOYS AND METHOD FOR MAKING THE SAME

Номер: US20180030577A1
Автор: Duyvesteyn Willem P.C.
Принадлежит:

A method () is provided for making a scandium-containing alloy. The method includes providing a molten metal (), and mixing the molten metal with a scandium-containing precursor () which undergoes thermal decomposition at the temperature of the molten metal to produce scandium oxide, thereby producing a scandium-containing alloy. 1. A method for making a scandium-containing alloy , comprising:providing a molten metal; andmixing the molten metal with a scandium-containing precursor which undergoes thermal decomposition at the temperature of the molten metal to produce scandium oxide, thereby producing a scandium-containing alloy.2. The method of claim 1 , wherein the scandium-containing precursor undergoes thermal decomposition upon contact with the molten metal to produce scandium oxide.3. The method of claim 2 , wherein the scandium-containing precursor undergoes thermal decomposition at the temperature of the molten metal to produce scandium oxide and a gaseous decomposition product.4. The method of claim 1 , wherein the scandium-containing precursor contains carbon.5. The method of claim 1 , wherein the scandium-containing precursor contains at least one carbonyl moiety.6. The method of claim 1 , wherein the scandium-containing precursor is scandium oxalate.7. The method of claim 1 , wherein the scandium-containing precursor is scandium carbonate.8. The method of claim 1 , wherein the molten metal comprises aluminum.9. The method of claim 1 , wherein the molten metal comprises magnesium.10. The method of claim 1 , wherein the molten metal comprises aluminum and magnesium.11. The method of claim 1 , wherein the molten metal has a temperature of at least 600° C. when it is mixed with the scandium compound.12. The method of claim 1 , wherein the molten metal has a temperature within the range of about 600° C. to about 900° C. when it is mixed with the scandium compound.13. The method of claim 1 , wherein mixing the molten metal and the scandium-containing precursor ...

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Номер записи: 50
30-01-2020 дата публикации

Stable, concentrated radionuclide complex solutions

Номер: US20200030464A1
Автор: Barbato Donato, Brambati Clementina, Chicco Daniela, de Palo Francesco, Fugazza Lorenza, Mariani Maurizio, Tesoriere Giovanni
Принадлежит:

The present invention relates to radionuclide complex solutions of high concentration and of high chemical stability, that allows their use as drug product for diagnostic and/or therapeutic purposes. The stability of the drug product is achieved by at least one stabilizer against radiolytic degradation. The use of two stabilizers introduced during the manufacturing process at different stages was found to be of particular advantage. 1. A process for manufacturing a pharmaceutical aqueous solution , comprising:{'sup': '177', 'providing a solution comprising a complex of the radionuclide Lu (Lutetium-177) and a somatostatin receptor binding peptide linked to the chelating agent DOTA; a first stabilizer against radiolytic degradation, and optionally a second stabilizer against radiolytic degradation different from the first stabilizer; and'}diluting the solution comprising the complex with an aqueous dilution solution comprising at least one stabilizer against radiolytic degradation to obtain the pharmaceutical aqueous solution;{'sup': '177', 'wherein if the solution comprising the complex comprises only the first stabilizer as an stabilizer against radiolytic degradation and not the second stabilizer, then the aqueous dilution solution comprises at least one stabilizer against radiolytic degradation that is different from the first stabilizer, and in the obtained pharmaceutical aqueous solution, the radionuclide Lu is present in a concentration that it provides a volumetric radioactivity of from 250 to 500 MBq/mL and the stabilizers are present in a total concentration of from 1.0 to 5.0 mg/mL.'}2. The process according to claim 1 , comprising:{'sup': '177', 'claim-text': (1.1) providing an aqueous solution comprising the radionuclide;', '(1.2) providing an aqueous solution comprising the a somatostatin receptor binding peptide linked to the chelating agent, and a first stabilizer against radiolytic degradation and optionally a second stabilizer against radiolytic ...

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Номер записи: 51
04-02-2021 дата публикации

METHOD FOR PRODUCING HIGH-PURITY SCANDIUM OXIDE

Номер: US20210032119A1
Автор: Higaki Tatsuya, Kobayashi Hiroshi
Принадлежит:

Provided is a method for obtaining high-purity scandium oxide efficiently from a solution containing scandium. The method for producing high-purity scandium oxide of the present invention has a first firing step S for subjecting a solution containing scandium to oxalation treatment using oxalic acid and firing the obtained crystals of scandium oxalate at a temperature of 400 to 600° C., inclusive, a dissolution step S for dissolving the scandium compound obtained by firing in one or more solutions selected from hydrochloric acid and nitric acid to obtain a solution, a reprecipitation step S for subjecting the solution to oxalation treatment using oxalic acid and generating a reprecipitate of scandium oxalate, and a second firing step S for firing the reprecipitate of obtained scandium oxalate to obtain scandium oxide. 1. A method for producing high-purity scandium oxide , the method comprising:a first calcination step of subjecting a solution containing scandium to an oxalate formation treatment using oxalic acid and calcinating crystals of obtained scandium oxalate at a temperature of 400° C. to 600° C.;a dissolution step of dissolving a scandium compound obtained by calcinating, in at least one selected from hydrochloric acid and nitric acid to obtain a solution;a reprecipitation step of subjecting the solution to an oxalate formation treatment using oxalic acid to generate a reprecipitation product of scandium oxalate; anda second calcination step of calcinating the obtained reprecipitation product of scandium oxalate to obtain scandium oxide.2. The method for producing high-purity scandium oxide according to claim 1 ,wherein in the reprecipitation step, the oxalate formation treatment is performed while a temperature of the solution is adjusted to 40° C. or higher and lower than 100° C.3. The method for producing high-purity scandium oxide according to claim 1 , wherein in the second calcination step claim 1 , the calcination is performed while a calcination ...

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Номер записи: 52
04-02-2021 дата публикации

Methods of Rare Earth Metal Recovery from Electronic Waste

Номер: US20210032725A1
Автор: Chittibabu Kethinni, Martino Debora, Warner John C.
Принадлежит: WARNER BABCOCK INSTITUTE FOR GREEN CHEMISTRY, LLC

Provided herein are methods of recovering rare earth metals from metallic waste using extraction and precipitation processes. In one embodiment, this application discloses a method of selectively extracting one or more rare earth metals from a metallic substrate, the method comprising the steps of: (a) crushing the metallic substrate to produce a crushed composition; (b) treating the crushed composition with a strong acid solution to produce an extraction composition; (c) heating the extraction composition; (d) adding a rare earth chelating agent to the heated extraction composition to produce a precipitate; and (e) isolating the precipitate. 1. A method of selectively extracting one or more rare earth metals from a metallic substrate , the method comprising the steps of:(a) crushing the metallic substrate to produce a crushed composition;(b) treating the crushed composition with a strong acid solution to produce an extraction composition;(c) heating the extraction composition;(d) adding a rare earth chelating agent to the heated extraction composition to produce a precipitate; and(e) isolating the precipitate.2. The method of wherein the rare earth metal is selected from the group consisting of neodymium (Nd) claim 1 , praseodymium (Pr) and dysprosium (Dy).3. The method of wherein the metallic substrate is a magnet or supermagnet.4. The method of wherein the metallic substrate is an audio component.5. The method of wherein step (a) is performed using a blender.6. The method of wherein the strong acid is sulfuric acid.7. The method of wherein the strong acid solution is 3N sulfuric acid.8. The method of wherein step (c) is performed by heating the extraction at 80° C.9. The method of wherein step (c) is performed for 30 minutes or less.10. The method of claim 1 , wherein the additional step of removing undissolved material from the extraction composition is inserted between steps (c) and (d).11. The method of wherein the rare earth chelating agent is selected from ...

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Номер записи: 53
11-02-2016 дата публикации

A method for extracting rare-earth metals

Номер: US20160040268A1
Автор: Evtushenko Aleksey Vladimirovich, Genkin Mikhail Vladimirovich, Komkov Aleksey Aleksandrovich, Safiulina Alfiya Minerovna, Shvetsov Sergey Vladimirovich, Spiridonov Vasiliy Sergeevich
Принадлежит: OPENED JOINT STOCK COMPANY "UNITED CHEMICAL COMPANY URALCHEM"

The present invention relates to a method for complex processing of apatite concentrate resulting in producing concentrate of rare earth metals (REM) and plaster from phosphogypsum, a waste of sulphuric acid technology for producing phosphoric acid from apatite. The method comprises recrystallization of hemihydrate or anhydrite of calcium sulphate into dihydrate of calcium sulphate in the presence of a soluble calcium salt at concentrations of 0.075-3.75 M (in terms of Ca) at subacidic conditions (pH>1), and dissolution with strong acid (pKa<0) at a concentration of 0.2-8.0 M (in terms of H). Recovery of REM into solution is up to 95%, the residual content of impurities of phosphorus, fluorine and alkali metals in dihydrate of calcium sulphate does not exceed 0.3 wt. %, 0.1 wt. %, 0.05 wt. %, respectively. 1. A method for extracting rare earth metals (REM) from phosphogypsum , the method comprising;successive steps of recrystallization of phosphogypsum and dissolution of REM;{'sup': 2+', '+, 'sub': 'a', 'wherein recrystallization of hemihydrate or anhydrite of calcium sulphate into dihydrate of calcium sulphate is carried out in the presence of soluble calcium salt at concentration of 0.075 M to 3.75 M (in terms of Ca) at subacidic conditions (pH>1); and wherein dissolution is carried out with strong acid (pK<0) at concentration of 0.2 M to 8.0 M (in terms of H).'}2. The method of claim 1 , wherein the calcium nitrate or calcium chloride claim 1 , or a mixture thereof is used as the calcium salt claim 1 , and nitric acid or hydrochloric acid or sulphuric acid or a mixture thereof is used as the acid.3. The method of claim 1 , wherein recrystallization is carried out at 10-50° C. during 0.25-4.0 hours claim 1 , preferable at 20-30° C. during 2.0-3.0 hours. This patent application is a national phase filing under section 371 of PCT/RU2013/000991, filed Nov. 8, 2013, which claims the priority of Russian patent application 2013109739, filed Mar. 5, 2013, each of which ...

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Номер записи: 54
09-02-2017 дата публикации

UTILIZATION OF TEMPERATURE HEAT ADSORPTION SKIN TEMPERATURE AS SCALE CONTROL REAGENT DRIVER

Номер: US20170037493A1
Автор: Arndt Rolf, Coleman Kim R.
Принадлежит:

The invention provides methods, compositions, and apparatuses for preventing the formation of scale in heap leach process solution distribution systems comprised of piping, spray nozzels, or emitter tubes. Solution distribution system components often become fouled by scale because of local hot spots more prone to form scale than other locations along the systems length. Positioning sensors that detect periods of high temperature stress and adjusting scale control reagent dosage to send the right amount to inhibit hot spot deposition allows for the control of scale without using wasteful excessive amounts of scale control reagents. This can vastly improve scale control performance under high temperature stress conditions while minimizing scale control reagent waste under less severe stress conditions to reduce the total operating cost of running heap leach mining operations which depend upon well-functioning solution distribution systems 1. A process solution distribution system comprising:a pump disposed and adapted to distribute a scale control reagent to at least a portion of the process distribution system in response to a measured or calculated temperature;emitter tubing in fluid communication with the pump and exposed to weather and direct sunlight;optional piping in fluid communication with the pump and the emitter tubing;a section of tubing located within 1000 feet of the pump, the section of tubing comprising the same materials as the emitter tubing, the section of tubing characterized as not being in fluid communication with the pump or emitter tubing;a sensor affixed to the section of tubing, the sensor adapted to measure or calculate the measured or calculated temperature; andoptionally at least one additional sensor.2. The process solution distribution system of wherein the sensor is selected from the list consisting of: thermocouple claim 1 , resistive temperature device claim 1 , infrared detector claim 1 , bimetallic device claim 1 , liquid expansion ...

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Номер записи: 55
07-02-2019 дата публикации

Method for recovering scandium

Номер: US20190040492A1
Автор: Hiroshi Kobayashi, Itsumi MATSUOKA, Yusuke Senba
Принадлежит: SUMITOMO METAL MINING CO LTD

The present invention provides a method for easy and efficient recovery of high purity scandium from nickel oxide ore, the method comprising: an adsorption step for passing a scandium-containing solution through an ion exchange resin to adsorb scandium on the ion exchange resin; an elution step for eluting scandium from the ion exchange resin to obtain a post-elution solution; an impurity extraction step in which after the elution step, the scandium-containing solution is subjected to a first solvent extraction using an amine-based impurity extractant and is separated into a first aqueous phase containing scandium and into a first organic phase containing impurities; and a scandium extraction step in which the first aqueous phase is subjected to a second solvent extraction using an amide derivative-containing scandium extractant to obtain a second organic phase containing scandium.

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Номер записи: 56
07-02-2019 дата публикации

BAUXITE RESIDUE RECYCLING

Номер: US20190040494A1
Автор: Emmert Marion H., Narayanan Remya P.
Принадлежит:

Recovery of scandium from mined red mud includes adding an acid to a quantity of red mud for converting oxides in the red mud, and roasting the quantity of red mud for decomposing compounds having low thermal stability, typically iron and titanium. Water is added to the roasted red mud for leaching the converted oxides into a leach liquor mixture including scandium and other dissolved rare earths, and the leach liquor mixture is agitated by sonication or ball milling to increase an exposed surface area of red mud particles in the leach liquor. PH of the leach liquor is adjusted to precipitate the rare earths while leaving the scandium in solution in the leach liquor, followed by precipitating the separated scandium oxalate remaining in the leach liquor by reducing the pH and adding oxalic acid. Precipitated scandium oxalate may then be filtered from the leach liquor. 1. A method for recovering scandium from mined red mud , comprising:adding an acid to a quantity of red mud for converting oxides in the red mud;roasting the quantity of red mud for decomposing compounds having low thermal stability;adding water to the roasted red mud for leaching the converted oxides into a leach liquor mixture including scandium and rare earths;agitating the leach liquor mixture to increase an exposed surface area of red mud particles in the leach liquor;adjusting the pH of the leach liquor to precipitate the rare earths while leaving the scandium in solution in the leach liquor;precipitating scandium oxalate from the leach liquor by reducing the pH and adding oxalic acid; andfiltering the precipitated scandium oxalate from the leach liquor.2. The method of wherein the red mud includes scandium claim 1 , iron and titanium claim 1 , further comprising extracting iron oxide and titanium oxide from the roasted red mud.3. The method of further comprising adding sulfuric acid to the red mud for converting oxides in the red mud to sulfates claim 1 , the sulfates including iron claim 1 , ...

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Номер записи: 57
18-02-2021 дата публикации

SELECTIVE MATERIAL RECOVERY FROM NATURAL BRINES

Номер: US20210047196A1
Автор: Bennett James P., Nakano Anna, Nakano Jinichiro N.
Принадлежит:

Embodiments relate to methods for generating selected materials from a natural brine. A natural brine comprising at least a portion of a selected material is heated. COis added and mixes with the natural brine forming a mixture such that the CO/P is a first predetermined value. The mixture is held so that impurities in the natural brine precipitate as solids leaving a second brine substantially comprising the selected material. The second brine is heated. COgas is injected into the second brine, mixing so that the CO/P is a second predetermined value. The mixture is held so that the selected material precipitates out and are removed. 1. A method for generating selected materials from a natural brine , comprising:heating a natural brine in a vessel to a first predetermined temperature, the natural brine comprising at least a portion of a selected material;{'sub': 2', '2', '2, 'adding COinto the vessel whereby the COmixes with the natural brine forming a mixture such that the CO/P is a first predetermined value;'}{'sub': '2', 'holding the mixture for a first predetermined time after the COaddition such that a solid is precipitated from the mixture;'}separating the precipitated solid from the mixture, leaving a second brine substantially comprising the selected material;heating the second brine to a second predetermined temperature;{'sub': 2', '2', '2, 'adding COinto the vessel whereby the COmixes with the second brine forming a second mixture such that the CO/P is a second predetermined value;'}{'sub': '2', 'holding the second mixture for a second predetermined time after the COaddition such that the selected material is precipitated from the second mixture; and'}removing the selected material precipitate.2. A method for generating selected materials from a natural brine of claim 1 , wherein the step of holding the second mixture for a second predetermined time comprises:adjusting the pressure, temperature, or surface energy of the natural brine.3. A method for ...

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Номер записи: 58
19-02-2015 дата публикации

METHOD FOR THE INTEGRATION OF CARBOCHLORINATION INTO A STAGED REFORMING OPERATION AS AN ALTERNATIVE TO DIRECT RESIDUE OXIDATION FOR THE RECOVERY OF VALUABLE METALS

Номер: US20150047465A1
Автор: Langley Justin
Принадлежит:

Method of combining industrial processes having inherent carbon capture and conversion capabilities offering maximum flexibility, efficiency, and economics while enabling environmentally and sustainably sound practices. Maximum chemical energy is retained throughout feedstock processing. A hybrid thermochemical cycle couples staged reforming with hydrogen production and chlorination. Hydrogen generated is used to upgrade feedstocks including bitumen, shale, coal, and biomass. Residues of upgrading are chlorinated, metals of interest are removed, and the remainder is reacted with ammonia solution and carbon dioxide to form carbonate minerals. The combination provides emissions free production of synthetic crude oil and derivatives, as well as various metals and fertilizers. Sand and carbonate minerals are potentially the only waste streams. Through this novel processing, major carbon dioxide reduction is afforded byminimizing direct oxidation. Supplemental heat to run the reactions is obtained through external means such as concentrated solar, geothermal, or nuclear. 2. The process as claimed in claim 1 , wherein the combined featuresof the integrated processes reduce the needed capacity and costs of pollution control mechanisms as well as allowing for the complete elimination of carbon dioxide emissions through mineralization and/or conversion by removing portions of the product gas stream and subsequently recycling the remaining gases back though the process for further reaction;in the case of carbon dioxide, involving its reaction to carbon monoxide, conversion to synthesis gas, and its subsequent processing to synthetic petrochemicals.3. The process as claimed in claim 1 , wherein the combined featuresare modified or expanded to accommodate the industrial processes of petrochemical production, conventional or non-conventional hydrocarbon refining operations, bio-refining, metal refining, rare earth separation, ceramics fabrication, glass production, fertilizer ...

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Номер записи: 59
19-02-2015 дата публикации

Method for Recovering Rare Earth from Rare Earth Element-Containing Alloy

Номер: US20150047469A1
Автор: Hino Eiji, Shindo Yuichiro
Принадлежит:

A method for recovering a rare earth element from a rare earth element-containing alloy, wherein a rare earth element is eluted by performing electrolysis in an electrolyte which contains a metal powder of a rare earth element-containing alloy. An object of this invention is to provide a method for extremely easily and efficiently recovering a rare earth element. 1. A method for recovering a rare earth element , wherein a rare earth element is eluted by performing electrolysis in an electrolyte which contains a metal powder of a rare earth element-containing alloy.2. The method for recovering a rare earth element according to claim 1 , wherein electric conducting salt is added to the electrolyte.3. The method for recovering a rare earth element according to claim 2 , wherein pH of the electrolyte is set between 2 and 8 claim 2 , and a solution temperature of the electrolyte is set between 10 and 90° C.4. The method for recovering a rare earth element according to claim 3 , wherein electrolysis is performed while agitating the electrolyte.5. The method for recovering a rare earth element according to claim 4 , wherein a rare earth element is recovered from a solution to which a rare earth element was eluted.6. The method for recovering a rare earth element according to claim 5 , wherein a rare earth element is recovered claim 5 , via a solvent extraction method or a crystallization method claim 5 , from a solution to which a rare earth element was eluted.7. The method for recovering a rare earth element according to claim 1 , wherein pH of the electrolyte is set between 2 and 8 claim 1 , and a solution temperature of the electrolyte is set between 10 and 90° C.8. The method for recovering a rare earth element according to claim 1 , wherein the electrolysis is performed while agitating the electrolyte.9. The method for recovering a rare earth element according to claim 1 , wherein the rare earth element is recovered from a solution to which the rare earth element is ...

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Номер записи: 60
18-02-2016 дата публикации

METHOD FOR RECOVERING SCANDIUM

Номер: US20160047014A1
Автор: Nagakura Toshihiko, Ozaki Yoshitomo
Принадлежит:

The present invention effectively recover high-grade scandium from nickel oxide ores. The present invention includes a leaching step (S) for charging nickel oxide ores and sulfuric acid into a pressurized vessel, a neutralizing step (S) for adding a neutralizing agent to the leachate to obtain a neutralized precipitate and a neutralized liquid, a sulfidizing step (S) for adding a sulfidizing agent to the neutralized liquid, an ion exchange step (S) for bringing the sulfidized solution into contact with a chelate resin, a solvent extraction step (S) for bringing a Sc eluent into contact with an extracting agent, a Sc precipitation Step (S) for adding a neutralizing agent or oxalic acid to a stripping solution, and a calcination step (S) for drying and calcining a precipitate to obtain scandium oxide. 1. A method for recovering scandium , comprising:the leaching step of obtaining a leachate and leach residue by solid-liquid separation under high temperature and high pressure after charging a nickel oxide ore containing scandium, aluminum and chromium into a pressure vessel with sulfuric acid,the neutralization step of obtaining neutralized sediment and a post-neutralization solution by adding a neutralizer to the leachate,the sulfuration step of by adding a sulfidizing agent to the post-neutralization solution, separating the liquid into nickel sulfide and a post-sulfuration solution,the ion exchange step of obtaining a scandium eluent by bringing the post-sulfuration solution into contact with a chelate resin to adsorb the scandium on the chelate resin,the solvent extraction step of obtaining a stripping solution by bringing the scandium eluent into contact with an extraction agent,the scandium precipitation step of obtaining precipitates by adding a neutralizer or oxalic acid to the stripping liquid, andthe roasting step of obtaining scandium oxide by drying and roasting the precipitates: wherein the chelate resin is a resin having iminodiacetic acid as a functional ...

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Номер записи: 61
18-02-2016 дата публикации

A method for extracting rare-earth metals

Номер: US20160047015A1
Автор: Aleksey Aleksandrovich KOMKOV, Aleksey Vladimirovich EVTUSHENKO, Alfiya Minerovna SAFIULINA, Mikhail Vladimirovich Genkin, Sergey Vladimirovich SHVETSOV, Vasiliy Sergeevich SPIRIDONOV
Принадлежит: Uralchem JSC

The present invention relates to a method for complex processing of apatite concentrate resulting in producing concentrate of rare earth metals (REM) and plaster from phosphogypsum, a waste of sulphuric acid technology for producing phosphoric acid from apatite. The method comprises leaching of REM into solution by recrystallization of hemihydrate or anhydrite of calcium sulphate into dihydrate of calcium sulphate with a soluble calcium salt at concentrations of 0.075-3.75 M (in terms of Ca 2+ ) and strong acid (pKa0) at a concentration of 0.2-8.0 M (in terms of H + ). Recovery of REM into solution is up to 98%, the residual content of impurities of phosphorus, fluorine and alkali metals in dihydrate of calcium sulphate does not exceed 0.3 wt. %, 0.1 wt. %, 0.05 wt. %, respectively.

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Номер записи: 62
08-05-2014 дата публикации

HIGH-PURITY ERBIUM, SPUTTERING TARGET COMPRISING HIGH-PURITY ERBIUM, METAL GATE FILM HAVING HIGH-PURITY ERBIUM AS MAIN COMPONENT THEREOF, AND PRODUCTION METHOD FOR HIGH-PURITY ERBIUM

Номер: US20140124366A1
Автор: Takahata Masahiro
Принадлежит: JX NIPPON MINING & METALS CORPORATION

High-purity erbium having a purity of 5N or higher excluding rare earth elements and gas components, and containing Al, Fe, Cu, and Ta each in an amount of 1 wtppm or less, W in an amount of 10 wtppm or less, carbon in an amount of 150 wtppm or less, alkali metals and alkali earth metals each in an amount of 1 wtppm or less, other transition metal elements in a total amount of 10 wtppm or less, and U and Th as radioactive elements each in an amount of 10 wtppb or less. An object of this invention is to provide a method of highly purifying erbium, which has a high vapor pressure and is difficult to refine in a molten state, as well as technology for efficiently and stably providing high-purity erbium obtained with the foregoing method, a sputtering target made of high-purity erbium, and a metal gate film having high-purity erbium as a main component thereof. 1. High-purity erbium having a purity of 5N or higher excluding rare earth elements and gas components , and containing Al , Fe , Cu , and Ta each in an amount of 1 wtppm or less , W in an amount of 10 wtppm or less , carbon in an amount of 150 wtppm or less , alkali metals and alkali earth metals each in an amount of 1 wtppm or less , other transition metal elements in a total amount of 10 wtppm or less , and U and Th as radioactive elements each in an amount of 10 wtppb or less.2. A high-purity erbium sputtering target consisting of the high-purity erbium according to .3. A metal gate film having claim 1 , as its main component claim 1 , high-purity erbium having a purity of 5N or higher excluding rare earth elements and gas components claim 1 , and containing Al claim 1 , Fe claim 1 , Cu claim 1 , and Ta each in an amount of 1 wtppm or less claim 1 , W in an amount of 10 wtppm or less claim 1 , carbon in an amount of 150 wtppm or less claim 1 , alkali metals and alkali earth metals each in an amount of 1 wtppm or less claim 1 , other transition metal elements in a total amount of 10 wtppm or less claim 1 , and ...

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Номер записи: 63
03-03-2022 дата публикации

LOW-COST SELECTIVE PRECIPITATION CIRCUIT FOR RECOVERY OF RARE EARTH ELEMENTS FROM ACID LEACHATE OF COAL WASTE

Номер: US20220064759A1
Автор: Honaker Rick Q., Zhang Wencai
Принадлежит:

The present invention concerns a process of selective precipitation for the purpose of recovering rare earth elements from acidic media derived from coal and coal byproducts via two main steps of sequential precipitation and selective precipitation. An intermediary step of re-precipitation can be included to further increase RRE concentrations, as well as improve contaminant metal removal.

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Номер записи: 64
26-02-2015 дата публикации

PROCESS FOR RECOVERING METALS BY REDUCTION AND CARBONYLATION

Номер: US20150053049A1
Автор: Khozan Kamran, Terekhov Dmitri, Van Der Linde Colwyn, Victor Emmanuel Nanthakumar
Принадлежит: CVMR CORPORATION

A process for treating a feed material composition includes a solid particulate precious metal material-rich feed material composition fraction and a solid particulate rare earth metal material-rich feed material composition fraction, in which the solid particulate precious metal material-rich feed material composition fraction includes one or more precious metals, and in which the solid particulate rare earth metal material-rich feed material composition fraction includes one or more rare earth metals. The process includes contacting the solid particulate feed material composition with a reducing agent within a reducing agent contacting zone to effect production of a reaction intermediate solid particulate material composition. 1. A process for treating a feed material composition , comprising:contacting the feed material composition with a reducing agent in a reducing agent zone to effect production of a reaction intermediate material composition, wherein the feed material composition is configured to be separated into a target metal material-rich feed material composition separation fraction and one or more target metal material-lean feed material composition separation fractions, in response to application of a separation agent that is associated with a separation agent-responsive characteristic, such that the target metal material-rich feed material composition separation fraction would become separated from the one or more target metal material-lean feed composition separation fractions, and such that one or more separations would be effected and each one of the one or more separations would be defined by the separation of the target metal material-rich feed material composition separation fraction from a one of the one or more target metal material-lean feed material composition separation fractions, wherein each one of the one or more separations of the target metal material-rich feed material composition separation fraction from a one of the one or more ...

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Номер записи: 65
25-02-2016 дата публикации

SULFONAMIDE-BASED SEPARATION MEDIA FOR RARE EARTH ELEMENT SEPARATIONS

Номер: US20160053344A1
Автор: Francis Matthew B., Moore Troy
Принадлежит: The Regents of the University of California

A sulfonamide based rare earth element ion separation media and method of synthesis and use are provided. A bed or column of sulfonamide resin for separations can be prepared by exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin; exposing the sulfonyl chloride resin to aqueous ammonia to form a sulfonamide resin; and then packing the sulfonamide resin into a separation column. Mixtures of lanthanide and other rare earth ions with very similar atomic radii and characteristics can be separated by flowing a mixture of lanthanide ions through a bed of sulfonamide resin followed by a mobile phase of an organic acid such as lactic acid to elute the separated rare earth element ions separated by the sulfonamide resin. Collected fractions of eluate can also be recycled through the sulfonamide media. 1. A method for separating rare earth element ions , the method comprising:flowing a solution containing a mixture of rare earth element ions through a bed of sulfonamide resin; andcollecting separated rare earth element ions from the sulfonamide resin bed.2. The method as recited in claim 1 , further comprising:exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin;exposing the sulfonyl chloride resin to aqueous ammonia to form an unsubstituted sulfonamide resin; andfabricating a bed of unsubstituted sulfonamide resin.3. The method as recited in claim 2 , wherein said sulfonate resin is a resin selected from the group of resins consisting of polystyrene claim 2 , acrylic claim 2 , polyester and melamine.4. The method as recited in claim 2 , further comprising:exposing a second sulfonate resin to chlorosulfonic acid to form a second sulfonyl chloride resin;exposing the second sulfonyl chloride resin to aqueous ammonia to form a second sulfonamide resin; andfabricating a mixed bed of unsubstituted sulfonamide resin and second sulfonamide resin.5. The method as recited in claim 4 , wherein said second sulfonate resin is ...

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Номер записи: 66
13-02-2020 дата публикации

CONTINUOUS SOLVENT EXTRACTION PROCESS FOR GENERATION OF HIGH GRADE RARE EARTH OXIDES FROM LEACHATES GENERATED FROM COAL SOURCES

Номер: US20200048737A1
Автор: Chandra Alind, Honaker Rick Q., Werner Joshua Michael
Принадлежит:

A continuous solvent extract process is provided for concentrating rare earth elements from leachates generated from coal sources. The process involves solvent extraction which utilizes an organic extractant mixed into an organic solvent. 1. A method of recovering rare earth elements from an aqueous coal source leachate , comprising:contacting, in a roughing circuit, rare earth elements in the aqueous coal source leachate with an organic phase to extract the rare earth elements into an organic phase and contaminants in an aqueous phase;scrubbing, in the roughing circuit, additional contaminants from the organic phase;stripping, in the roughing circuit, the rare earth elements from the organic phase; andrecovering the rare earth elements in a rare earth element containing solution.2. The method of claim 1 , including using an organic extractant in the organic phase to provide preferential extraction of the rare earth elements from the aqueous coal source leachate.3. The method of claim 2 , including completing the contacting at an operating pH of between 0.5 and 3.5.4. The method of claim 1 , including using a first acid to selectively scrub the additional contaminants from the organic phase at a first pH.5. The method of claim 4 , including using a second acid to strip the rare earth elements from the organic phase at a second pH wherein said second pH Подробнее

Номер записи: 67
05-03-2015 дата публикации

METHOD FOR EXTRACTING AND SEPARATING RARE-EARTH ELEMENT

Номер: US20150059528A1
Автор: CHEN Ji, Deng Yuefeng, Guo Lin, Lan Jingbo, Shen Lu
Принадлежит:

A method for extracting and separating a rare-earth element. Cations and anions in a quaternary ammonium ionic liquid extractant, that is, 2-ethylhexyl phosphate mono-2-ethylhexyl acrylate trialkyl methyl ammonium and phosphate di(2-ethylhexyl) phthalate trialkyl methyl ammonium, react with rare-earth ions to form neutral complex molecules, also, a collaborative effect and a competitive effect are present between the cations and the anions in the quaternary ammonium ionic liquid extractant in a rare-earth element extraction process, the separation factor for the rare-earth element is thus increased. The method for extracting and separating the rare-earth element provides good interfacial phenomena in the extraction process, does not generate emulsification, obviates the need for extractant saponification, and provides increased separation factor for rare-earth elements, and particularly increased separation factor for heavy rare-earth elements. In addition, the rare-earth element extraction and separation method is of reduced extraction acidity, of reduced stripping acidity, and of reduced acid consumption. 130-. (canceled)31. A method for extracting and separating a rare-earth element , comprising:extracting the rare-earth element from an aqueous solution of rare-earth nitrate into n-heptane, by using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester trialkyl methyl ammonium or di-2-ethylhexyl phosphoric acid trialkyl methyl ammonium as an extractant, and n-heptane as a diluent.32. The method for extracting and separating a rare-earth element according to claim 31 , wherein the extraction temperature is 20˜50° C.; and/or wherein the aqueous solution of rare-earth nitrate has a concentration of 7˜9×10mol/L; and/or wherein after extracting the rare-earth element from the aqueous solution of rare-earth nitrate into n-heptane claim 31 , controlling the aqueous solution of rare-earth nitrate to have a pH of 1˜4; and/or wherein the rare-earth element is one or more of ...

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Номер записи: 68
10-03-2022 дата публикации

Process for Extraction of Recoverable Rare Earth Elements (REE) Using Organic Acids and Chelating Compounds

Номер: US20220074019A1
Автор: McKoy Mark L., Montross Scott, Tarka Thomas J., Verba Circe, Yang Jonathan
Принадлежит:

One or more embodiments relates to a process for extracting Rare Earth Elements (REEs) from REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal. In at least one embodiment the process includes contacting the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal with an Organic Acid Solution (OAS) comprising at least one organic acid and at least one ionic salt at a predetermined ambient temperature and predetermined pH; and separating the REE from the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal, forming REE+Yttrium (REY) concentrate. 1. A process for extracting Rare Earth Elements (REEs) from REE-bearing underclays , claystones , shales , coal-mining waste , and waste coal the process comprising:contacting the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal with an Organic Acid Solution (OAS) comprising at least one organic acid and at least one ionic salt at a predetermined ambient temperature and predetermined pH; andseparating the REE from the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal, forming REE+Yttrium (REY) concentrate.2. The process of where separating the REE from the REE-bearing underclays claim 1 , claystones claim 1 , shales claim 1 , coal-mining waste claim 1 , and waste coal further comprises performing at least one of solid-liquid separating claim 1 , filtering claim 1 , drying and calcinating.3. The process of wherein the ambient temperature is above the freezing point of the OAS and below 35° C.4. The process of wherein the predetermined pH is between about 2 and 6.5. The process of wherein the predetermined pH is between about 4 and 5.6. The process of wherein the OAS solution comprising the at least one organic acid and the at least one ionic salt follows the formula c (ionic salt)=0.5 mol/L and c (organic acid)=0.1 mol/L where c (ionic salt) is the concentration of ionic salt and c (organic acid) is ...

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Номер записи: 69
21-02-2019 дата публикации

Composite Extractant-Enhanced Polymer Resin, Method of Making the Same, and Its Usage for Extraction of Valuable Metal(s)

Номер: US20190054457A1
Автор: Abella Marie Ysabel R., Abrenica Gomer M., JR. Vincent D., Mattera, Patkar Shailesh, Xu Wen-Qing
Принадлежит:

A composite extractant-enhanced polymer resin comprising an extractant and a polymer resin for direct extraction of valuable metals such as rare earth metals, and more specifically, scandium, from an acid-leaching slurry and/or acid-leaching solution in which ferric ions are not required to be reduced into ferrous ions. The extractant may be cationic, non-ionic, or anionic. More specifically, the extractant di(2-ethylhexyl)phosphoric acid may be used. The polymer resin may be non-functional or have functional groups of sulfonic acid, carboxylic acid, iminodiacetic acid, phosphoric acid, or amines. The composite extractant-enhanced polymer resin may be used for extraction of rare earth metals from acid-leaching slurries or solutions. 1. A composite comprising an extractant and a polymer resin.2. The composite of claim 1 , wherein the extractant is one of cationic claim 1 , non-ionic claim 1 , and anionic or a combination thereof.3. The composite of claim 1 , wherein the polymer resin comprises one of a non-functional polymer or a functional polymer.4. The composite of claim 1 , wherein the extractant comprises a cation extractant having at least one functional group selected from organophosphorus acids claim 1 , carboxylic acids claim 1 , and sulfonic acids.5. The composite of claim 1 , wherein the extractant comprises an anionic extractant having at least one amine functional group.6. The composite of claim 1 , wherein the extractant comprises at least one of di(2ethylhexyl)phosphoric acid (DEHPA) claim 1 , 2-ethyl-hexyl-2-ethyl-hexyl-phosphoric acid claim 1 , tri-butyl phosphate claim 1 , versatic acid claim 1 , and versavic 10.7. The composite of claim 1 , wherein the polymer resin comprises a porous non-functional polymer resin.8. The composite of claim 1 , wherein the polymer resin comprises at least one functional group selected from phosphoric acid groups claim 1 , sulfonic acid groups claim 1 , carboxylic acid groups claim 1 , iminodiacetic acid claim 1 , and ...

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Номер записи: 70
01-03-2018 дата публикации

Novel Radioresistant Alga of the Genus Coccomyxa

Номер: US20180057383A1
Автор: Atteia Ariane, Farhi Emmanuel, Pro Danièle, Rivasseau Corinne
Принадлежит:

The invention relates to novel algae of the genus , in particular the algae of a new species called C-IR3-4C, and their use for capturing metals from aqueous media, and in particular from radioactive media. 116.-. (canceled)17Coccomyxa. A method of capturing at least one element from an aqueous medium containing said element , the method comprising incubating in the aqueous medium a unicellular green alga of the genus comprising , in the 18S ribosomal RNA-ITS1-5.8S , ribosomal RNA-ITS2-28S ribosomal RNA genes of having polynucleotide sequence at least 96% identity to the polynucleotide sequence of SEQ ID NO: 1 ,{'sup': 14', '3, 'wherein the at least one element is selected from the group consisting of Cs, Ag, Co, Mn, Sr, Cu, Cr, Zn, Ni, Fe, Sb, U, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, an actinide, a lanthanide, the C radioisotope and the H radioisotope.'}18. The method of claim 17 , wherein the unicellular green alga is the Coccomyxa strain deposited with the Culture Collection of Algae and Protozoa (CCAP) under deposit number CCAP 216/26.19. The method of claim 17 , wherein that element is selected from the group consisting of Sr and Cu.20. The method of claim 17 , wherein said aqueous medium is radioactive medium.21. The method of claim 17 , wherein said aqueous medium is nonradioactive medium.22. The method of claim 20 , wherein the element is a metal selected from the group consisting of Ag claim 20 , Co claim 20 , Cs claim 20 , U claim 20 , Mn claim 20 , Cu and Sr claim 20 , wherein said metal is in the form of a radioactive isotope claim 20 , or in the form of a mixture of isotopes.23. The method of claim 17 , wherein said green algae are combined with at least one other microorganism and/or at least one multicellular plant.24. The method of claim 17 , wherein the growth of the unicellular green alga is controlled by regulating the illumination of said aqueous medium.25. The method of claim 17 , further comprising recovering said ...

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Номер записи: 71
04-03-2021 дата публикации

METHOD FOR TREATING FLUORINE-CONTAINING RARE EARTH MINERAL PARTICLES

Номер: US20210062295A1
Автор: Cui Jianguo, Gao Ting, Hao Xiaoli, Hou Ruien, Li Bo, Li Dong, Wang Zhe, Xu Meng, Zhang Yang
Принадлежит:

A method for treating fluorine-containing rare earth mineral particles may include mixing a first batch of the fluorine-containing rare earth mineral particles with a first sulfuric acid solution in a weight ratio in the range of 2-10:1 of the sulfuric acid in the first sulfuric acid solution to the first batch of fluorine-containing rare earth mineral particles, and heating the mixture to cause a liquid-solid reaction. The solid phase and liquid phase may be separated after the reaction to obtain an acid filtrate and an acid residue. The acid residue may be leached with water to obtain an aqueous leaching liquor that comprises a rare earth sulfate and an aqueous leaching residue. A second sulfuric acid solution may be added to the acid filtrate in an amount such that the sulfuric acid concentration of the acid filtrate is 40-85 wt %. 1. A method for treating fluorine-containing rare earth mineral particles , comprising:(1) mixing a first batch of the fluorine-containing rare earth mineral particles with a first sulfuric acid solution in a weight ratio in the range of 2-10:1 of the sulfuric acid in the first sulfuric acid solution to the first batch of fluorine-containing rare earth mineral particles, and heating the mixture to cause a liquid-solid reaction;(2) separating the solid phase and liquid phase after the reaction to obtain an acid filtrate and an acid residue;(3) leaching the acid residue with water to obtain an aqueous leaching liquor that comprises a rare earth sulfate, and an aqueous leaching residue;{'sup': 'th', '(4) adding a second sulfuric acid solution to the acid filtrate in an amount such that the sulfuric acid concentration of the acid filtrate is 40-85 wt %; and then performing the steps (1)-(3) i times for treating further batches of fluorine-containing rare earth mineral particles up to the ibatch, wherein the character “i” is a natural number greater than or equal to 2 and wherein each performance of the steps (1)-(3) treats one batch;'} ...

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Номер записи: 72
04-03-2021 дата публикации

SYSTEMS AND METHODS FOR SELECTIVE RECOVERY OF METALS FROM ION EXCHANGE RESINS

Номер: US20210062296A1
Автор: Case Mary Ellen, Fox Robert Vincent, Gonzalez Justin Ernesto, Moses John M., Sinclair Laura Katherine, Sweeney Jessica Lee
Принадлежит:

Systems and methods for selectively recovering a target metal from an ion exchange resin are generally described. In certain embodiments, such methods and systems can be employed for metal purification and enrichment of target metal species from mixtures containing contaminating or non-target metals. In some embodiments, ion exchange is accomplished in the presence of one or more species that facilitate the recovery of a metal from a composition further comprising one or more other metals. The recovered metal-containing composition may contain the recovered metal at relatively high purity and/or in relatively large amounts. In some embodiments, the conditions present during ion exchange are varied in a manner that facilitates the enrichment of a metal from an initial (e.g. sample) composition further comprising one or more other metals to result in a product that contains the enriched metal at relatively high purity and/or in relatively large amounts 1. A method of selectively recovering a first metal from an ion exchange resin , comprising:{'sup': −5', '4, 'contacting a non-polar fluid and an extractant with the ion exchange resin, the first metal, and a second metal, wherein at least one of the first metal and the second metal are bound to the ion exchange resin, wherein the ion exchange resin comprises a plurality of functional groups having a proton dissociation constant of greater than or equal to 10and less than or equal to 10; and'}selectively eluting the first metal from the ion exchange resin into the non-polar fluid such that a ratio of the first metal to the second metal in the non-polar fluid is greater than a ratio of the first metal to the second metal bound to the ion exchange resin.2. The method of claim 1 , wherein contacting step comprises introducing the non-polar fluid and the extractant into a column containing the ion exchange resin claim 1 , the first metal claim 1 , and the second metal claim 1 , wherein at least one of the first metal and ...

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Номер записи: 73
20-02-2020 дата публикации

DEVICE FOR CONTINUOUSLY DECOMPOSING RARE EARTH CONCENTRATE ORE

Номер: US20200056261A1
Автор: DU Guoshan, QIN Bo, QIU Shuang, Tang Jianwen, XIAN Pengfei, ZHOU Wenlong
Принадлежит:

Provided is a device for continuously decomposing a rare earth concentrate ore. The device includes a body, a bidirectional propeller and a driving assembly. The body has a material inlet, two liquid inlets and two exhaust gas outlets disposed at the top of the body, two material outlets disposed at the bottom of the body and a heat preservation chamber provided inside a side wall of the body. The bidirectional propeller is provided in the body and extends along a length direction of the body. The driving assembly is connected to the rotating shaft. 1. A device for continuously decomposing a rare earth concentrate ore , comprising: the material inlet is located in the middle of the top of the body,', 'one of the two liquid inlets is located at a first side of the material inlet and the other one of the two liquid inlets is located at a second side of the material inlet,', 'one of the two exhaust gas outlets is located at the first side of the material inlet and the other one of the two exhaust gas outlets is located at the second side of the material inlet,', 'one of the two material outlets is adjacent to a first end of the body and the other one of the two material outlets is adjacent to a second end of the body, and', 'the heat preservation chamber has a heat preservation liquid inlet and a heat preservation liquid outlet;, 'a body having a material inlet, two liquid inlets and two exhaust gas outlets disposed at the top of the body, two material outlets disposed at the bottom of the body and a heat preservation chamber provided inside a side wall of the body, wherein a rotating shaft comprising a first shaft section and a second shaft section,', 'a first spiral blade disposed on the first shaft section of the rotating shaft, and', 'a second spiral blade disposed on the second shaft section of the rotating shaft, wherein a spiral direction of the first spiral blade is opposite to that of the second spiral blade, such that the first spiral blade discharges ...

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Номер записи: 74
20-02-2020 дата публикации

SEPARATION OF RARE EARTH ELEMENTS USING SUPPORTED MEMBRANE SOLVENT EXTRACTION

Номер: US20200056264A1
Автор: Bhave Ramesh R., Islam Syed Z.
Принадлежит:

A system and method for the recovery and separation of rare earth elements (REEs) are provided. The system and method include the supported membrane solvent extraction of REEs and the separation of light and heavy REEs that have been recovered from scrap permanent magnets and other electronic waste. In supported membrane solvent extraction, an organic phase consisting of an extractant and an organic solvent is immobilized in the pores of hollow fibers. An aqueous feed solution and a strip solution flow along the shell side and lumen side of the hollow fibers, respectively. The extractant functions as a carrier to selectively transport certain rare earth metal ions from the feed side to the strip side. The rare earth metals are concurrently back extracted in the strip solution, allowing processing to proceed continuously without equilibrium limitations. 1. A method for the separation of rare earth elements , the method comprising:introducing, into a liquid containing an acid, a pre-mixture of substantially pure rare earth element oxides, thereby obtaining an aqueous feed solution containing a first rare earth element and a second rare earth element;providing a plurality of hollow fibers each including a lumen side spaced apart from a shell side to define a membrane therebetween, the membrane including a plurality of pores dispersed therein;pre-impregnating the plurality of pores of the membrane for each of the plurality of hollow fibers with an organic phase, the organic phase including an organic solvent and an extractant;contacting one of the lumen side or the shell side of the plurality of hollow fibers with the aqueous feed solution containing a concentration of the first rare earth element and a concentration of the second rare earth element; andcontacting the other of the lumen side or the shell side of the plurality of hollow fibers with a strip solution, wherein the first rare earth element is simultaneously back-extracted into the strip solution from the ...

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Номер записи: 75
20-02-2020 дата публикации

METHOD AND SYSTEM FOR PROCESSING RARE EARTH CONCENTRATE ORE

Номер: US20200056265A1
Автор: DU Guoshan, QIN Bo, QIU Shuang, Tang Jianwen, XIAN Pengfei, ZHOU Wenlong
Принадлежит:

Provided are a method and a system for processing a rare earth concentrate ore. The method comprises (1) mixing the rare earth concentrate ore and concentrated sulfuric acid, thereby obtaining a mixed slurry and a first fluorine-containing gas; (2) mixing the mixed slurry and an initiator liquid for acidolysis, thereby obtaining a clinker and a second fluorine-containing gas; (3) subjecting the clinker to leaching with water, thereby obtaining a leached slurry; (4) subjecting the leached slurry to a solid-liquid separation, thereby obtaining a filtrate and a leached slag, and recycling the leached slag to step (2) for acidolysis again. 1. A method for processing a rare earth concentrate ore , comprising:(1) mixing the rare earth concentrate ore and concentrated sulfuric acid, thereby obtaining a mixed slurry and a first fluorine-containing gas;(2) mixing the mixed slurry and an initiator liquid for acidolysis, thereby obtaining a clinker and a second fluorine-containing gas;(3) subjecting the clinker to leaching with water, thereby obtaining a leached slurry;(4) subjecting the leached slurry to a solid-liquid separation, thereby obtaining a filtrate and a leached slag, and recycling the leached slag to step (2) for acidolysis again.2. The method according to claim 1 , wherein before mixing the rare earth concentrate ore and concentrated sulfuric acid claim 1 , the method further comprises:(5) subjecting the rare earth concentrate ore to ball-milling, thereby obtaining rare earth concentrate ore particles;(6) sieving the rare earth concentrate ore particles, thereby obtaining an oversize material and an undersize material, and recycling the oversize material to ball-milling and mixing the undersize material and concentrated sulfuric acid.3. The method according to claim 1 , further comprising:(7) subjecting the first fluorine-containing gas and the second fluorine-containing gas to spraying with a spray liquid, thereby obtaining a fluorine-containing slurry.4. The ...

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Номер записи: 76
28-02-2019 дата публикации

Scandium purification method

Номер: US20190062869A1
Автор: Hiroshi Kobayashi, Itsumi MATSUOKA, Yusuke Senba
Принадлежит: SUMITOMO METAL MINING CO LTD

In separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium, scandium is recovered from only one system. The method according to the invention comprises: an extraction step S1 for treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic solution (a feed solution for extraction), and then solvent-extracting the feed solution with the use of a scandium extractant containing an amide derivative to thereby divide the feed solution into an organic extract (a first organic phase) containing scandium and thorium and a liquid extract (a first aqueous phase) containing impurities; and a washing step S2 for adding sulfuric acid to the organic extract (the first organic phase) and thus dividing the same into washed organic matters (a second organic phase) containing thorium and a washed liquid (a second aqueous phase) containing scandium.

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Номер записи: 77
28-02-2019 дата публикации

SOLUBILIZATION OF SCANDIUM FROM FLUORIDE BEARING MATERIALS

Номер: US20190062870A1
Автор: HARTLEY Christopher Jeffrey, LIAO Lunzhi, Weingaertner David
Принадлежит:

A method of selectively removing scandium from a scandium and fluoride-containing feed material includes providing the scandium-containing feed material, acid leaching the scandium-containing feed material with at least one acid in a presence of at least one of an aluminum or iron containing salt to form a scandium containing stream, and purifying the scandium containing stream to form a scandium compound end product. 1. A method of selectively removing scandium from a scandium-containing feed material , comprising:providing the scandium-containing feed material;acid leaching the scandium-containing feed material with at least one acid in a presence of at least one of an aluminum or iron containing salt to form a scandium containing stream; andpurifying the scandium containing stream to form a scandium compound end product.2. The method of claim 1 , wherein the at least one of the aluminum containing salt or the iron containing salt is added to the scandium-containing feed material prior to the step of acid leaching.3. The method of claim 1 , wherein the at least one of the aluminum containing salt or the iron containing salt is dissolved in a solution comprising the least one acid.4. The method of claim 1 , wherein the at least one of the aluminum containing salt or the iron containing salt is separately added to a reactor vessel in which the acid leaching takes place.5. The method of claim 1 , wherein the at least one acid is selected from at least one of hydrochloric acid claim 1 , sulfuric acid and nitric acid.6. The method of claim 1 , wherein the scandium compound end product comprises scandium hydroxide claim 1 , scandium oxide claim 1 , scandium chloride claim 1 , scandium oxalate or scandium carbonate.7. The method of claim 1 , wherein the step of purifying comprises at least one of solvent extraction claim 1 , ion exchange and stripping.8. The method of claim 1 , wherein the scandium-containing feed material comprises a solid material containing fluorine ...

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Номер записи: 78
10-03-2016 дата публикации

METHOD FOR THE INTEGRATION OF CARBOCHLORINATION INTO A STAGED REFORMING OPERATION AS AN ALTERNATIVE TO DIRECT RESIDUE OXIDATION FOR THE RECOVERY OF VALUABLE METALS

Номер: US20160068926A1
Автор: Langley Justin
Принадлежит:

Method of combining industrial processes having inherent carbon capture and conversion capabilities offering maximum flexibility, efficiency, and economics while enabling environmentally and sustainably sound practices. Maximum chemical energy is retained throughout feedstock processing. A hybrid thermochemical cycle couples staged reforming with hydrogen production and chlorination. Hydrogen generated is used to upgrade feedstocks including bitumen, shale, coal, and biomass. Residues of upgrading are chlorinated, metals of interest are removed, and the remainder is reacted with ammonia solution and carbon dioxide to form carbonate minerals. The combination provides emissions free production of synthetic crude oil and derivatives, as well as various metals and fertilizers. Sand and carbonate minerals are potentially the only waste streams. Through this novel processing, major carbon dioxide reduction is afforded by minimizing direct oxidation. Supplemental heat to run the reactions is obtained through external means such as concentrated solar, geothermal, or nuclear. 140-. (canceled)41. An apparatus for separating rare earth elements from an alkali halide melt , the apparatus comprising:i. an alkali halide melt of mixed composition containing at least some amount of rare earth halidesii. a beta alumina solid electrolyte functioning as a means of cationic exchangeiii. at least one other molten salt in contact with the beta alumina solid electrolyte materialwhich provides a means for the transport or exchange of cationic species from one melt to at least one other melt.42. The apparatus as claimed in claim 41 , further comprising one or more of the following:i. means of precise control of one or more molten salts so as to establish selective cationic transport through chemical gradientii. means of an imposed pressure gradient between the molten salts so as to establish selective cationic transport through dispersioniii. means of an imposed electrical gradient between ...

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Номер записи: 79
10-03-2016 дата публикации

EXTRACTION OF RARE EARTH METALS FROM NdFeB USING SELECTIVE SULFATION ROASTING

Номер: US20160068929A1
Автор: Carlson Brett N., Taylor Patrick R.
Принадлежит:

Sulfuric acid baking allows for the selective extraction of rare earth metals from scrap NdFeB magnets. This process has the advantage of making the high-value rare earth metals water soluble while converting the contained iron, around 70% of the magnet's mass, into stable and insoluble iron (III) oxide, eliminating the need for separating and precipitating iron from solution. The process also has the advantage of safely disposing of metalworking fluid contained in rare earth magnet machine waste, a troublesome contaminate from technical and environmental perspective. 1. A method for extracting rare earth metals from a rare earth containing material , comprising:mixing the rare earth containing material with an acid and water to form a slurry, wherein the rare earth containing material comprises at least one rare earth metal and at least one other metal;roasting the slurry under oxidizing conditions at temperatures between about 200° C. and about 900° C. to form a baked mixture and an off gas;leaching the baked mixture in an aqueous solution to form a liquid leaching product comprising at least one soluble rare earth ion, and a solid leaching residue comprising at least one other insoluble metal oxide; andseparating the at least one soluble rare earth ion from the liquid leaching product by precipitation.2. The method of claim 1 , wherein said slurry is comprised of at least about 1.5 gram of acid per 1 gram said rare earth bearing material.3. The method of claim 1 , wherein the acid is sulfuric acid.4. The method of claim 1 , wherein said precipitation is performed with oxalic acid as the precipitation agent.5. The method of claim 1 , wherein said precipitation comprises a first a solvent extraction stage which separates individual rare earths into different process streams prior to precipitation6. The method of claim 1 , wherein said baking is performed in a rotary kiln or a multiple hearth furnace.7. The method of claim 1 , wherein the baked mixture comprises at ...

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Номер записи: 80
10-03-2016 дата публикации

Extraction/separation method

Номер: US20160068930A1
Автор: Hiroto Sugahara
Принадлежит: Shin Etsu Chemical Co Ltd

The inventive extraction/separation method involves the step of contacting an organic phase containing a dialkyldiglycol amic acid extractant: R 1 R 2 NCOCH 2 OCH 2 COOH with an aqueous solution containing scandium and zirconium and/or hafnium for thereby extracting zirconium and/or hafnium into the organic phase. The purity of scandium can be efficiently increased by the simple step of solvent extraction.

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Номер записи: 81
08-03-2018 дата публикации

Method for Isolating Americium from Liquid Radioactive Waste and for Separating Americium from Rare Earth Elements

Номер: US20180066337A1
Автор: ALYAPYSHEV Mihail Yurievich, BABAIN Vasily Aleksandrovich, HASANOV Rinat Nailevich, KENF Ekaterina Vladimirovna, LOGUNOV Mihail Vasilievich, SHADRIN Andrey Yurievich, TKACHENKO Ludmila Igorevna, VIDANOV Vitaliy Lvovich, VOROSHILOV Yuriy Arkadievich
Принадлежит:

The proposed invention relates to processes of extraction and concentration of radio nuclides and can be used in radiochemical technologies when processing liquid radioactive wastes. 1. A method for extraction of americium from liquid radioactive wastes and separation it from rare-earth elements , comprising simultaneous extraction of americium and rare-earth elements from nitric acid radioactive solution with neutral solution of organic extracting agent in polar fluorinated organic solvent , washing of saturated with metals organic phase , selective re-extraction of americium , characterized in that N ,N ,N′ ,N′-tetraalkyl-amide of diglycolic acid as extracting agent and as a solution for re-extraction of americium—solution containing 5-20 g/L of complexon , 5-60 g/L of nitrogen-containing organic acid and 60-240 g/L of salting-out agent.2. The method of claim 1 , characterized in that meta-nitrobenzotrifluoride or phenyl trifluoride methylsulphone is used as the polar fluorinated organic solvent.3. The method of claim 1 , characterized in that aminopolycarbonic acids chosen from the range of: diethylene-triamine-pentaacetic acid claim 1 , ethylene-diamine-tetraacetic acid claim 1 , nitrile-triacetic acid claim 1 , are used as the complexon.4. The method of claim 1 , characterized in that nitrogen-containing organic acid are chosen from the range of: amino-acetic acid claim 1 , picolinic acid claim 1 , nicotinic acid claim 1 , α-alanin claim 1 , β-alanin claim 1 , valine claim 1 , norleucine.5. The method of claim 1 , characterized in that ammonium nitrate is used as the salting-out agent. This application is a US 371 Application from PCT/RU2015/000967 filed Dec. 31, 2015, which claims priority to Russia Application 2015117911 filed May 13, 2015, the technical disclosures of which are hereby incorporated herein by reference.The proposed invention relates to the processes of extraction and concentration of radio nuclides and can be used in radiochemical technologies ...

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Номер записи: 82
05-06-2014 дата публикации

REFINING METHODS AND AGENTS FOR RARE EARTH PRODUCTION

Номер: US20140154155A1
Автор: Komon Zachary J.A., Wyrsta Michael D.
Принадлежит: Lixivia, Inc.

Hydrometallurgical systems, methods, and compositions are described in which organic amine-based lixiviants are utilized in the selective recovery of rare earth elements. The lixiviant can be regenerated in situ, permitting the organic amine to be used in substoichiometric amounts. 1. A method for extracting a rare earth element , comprising:contacting a sample comprising a first rare earth element with a first lixiviant, the first lixiviant comprising a first organic amine cation and a first counterion;forming a first supernatant comprising an uncharged first organic amine, and a first complex comprising a cation of the first rare earth element and the first counterion;transferring the first rare earth element cation from the first supernatant; andregenerating the first organic amine cation,wherein the first organic amine cation is provided in substochiometric amounts relative to the first rare earth element.2. The method of claim 1 , wherein the first organic amine cation is regenerated by the addition of an acid form of the first counterion while the sample is in contact with the first lixiviant.3. The method of claim 1 , further comprising the step of removing the first complex from the supernatant.4. The method of claim 3 , wherein the first complex is removed by forming a precipitate.5. The method of claim 1 , wherein the first organic amine has a pKa of 8 to 14.6. The method of claim 5 , wherein the first organic amine cation is obtained from a biological source.7. The method of claim 1 , wherein the first counterion has a pKa of 1 to 6.8. The method of claim 1 , wherein the first lixiviant is formed by adding an acid to the uncharged first organic amine in the presence of the sample.9. The method of claim 1 , wherein the first rare earth element cation is transferred by forming a precipitate.10. The method of claim 1 , wherein the sample further comprises a second rare earth element claim 1 , and further comprising the steps of:transferring the first ...

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Номер записи: 83
18-03-2021 дата публикации

METHOD FOR THE RECOVERY OF LITHIUM

Номер: US20210079496A1
Автор: Harris Bryn, White Carl
Принадлежит:

A method is disclosed for maximising the recovery of lithium from purified feed solutions in either chloride or sulphate media. The solubility of lithium carbonate is sufficiently high that conventional techniques do not recover all of the lithium. An ion exchange process has been developed wherein the residual lithium is also recovered, leading to essentially 100% recovery of the lithium in the process solution. 1. A method for recovery of lithium , the method including:contacting a lithium-containing aqueous solution with a phosphonic-sulfonic acid resin to adsorb the lithium to a surface of the phosphonic-sulfonic acid resin to form an Li-loaded resin and a Li-barren solution; andeluting lithium from the Li-loaded resin with an eluant to form a Li-rich eluant solution.2. The method of claim 1 , wherein the eluant is selected from the group consisting of: a bicarbonate solution claim 1 , a hydrochloric acid solution claim 1 , or a sulphuric acid solution.3. The method of claim 1 , wherein the eluant is a bicarbonate solution having a bicarbonate ion concentration that is less than solubility limit for LiHCO.4. The method of claim 3 , wherein the bicarbonate solution is a sodium and/or potassium bicarbonate solution.5. The method of claim 1 , wherein the eluant is selected from the group consisting of: a hydrochloric acid solution containing at least 5 wt % hydrochloric acid claim 1 , and/or a sulphuric acid solution containing at least 5 wt % sulphuric acid.6. The method of claim 1 , wherein the lithium containing aqueous solution is substantially free of copper claim 1 , iron claim 1 , aluminium claim 1 , nickel claim 1 , cobalt and/or manganese.7. The method of claim 1 , wherein the lithium containing aqueous solution includes a total amount of lithium that is less than or equal to the saturation concentration of Li in the lithium containing solution.8. The method of claim 1 , wherein prior to the contacting step claim 1 , the method includes:a precipitation ...

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Номер записи: 84
14-03-2019 дата публикации

Selective Recovery of Rare Earth Metals From an Acidic Slurry or Acidic Solution

Номер: US20190078175A1
Автор: Abella Marie Ysabel R., Abrenica Gomer M., Bedes Louie I., Mattera Vincent D., Patkar Shailesh, Xu Wen-Qing
Принадлежит:

A method for extracting rare earth metals from an acidic slurry or an acidic solution. The method includes providing an acidic slurry or acidic solution; adding a composite comprising an extractant and a polymer resin; mixing the composite with the acidic slurry or acidic solution to form a mixture slurry or solution; and separating the mixture slurry or solution into a rare-earth-metal-loaded composite and a raffinate slurry or solution. The acidic slurry or acidic solution comprises at least one rare earth metal and at least one early transition metal and/or at least one actinide metal. 1. A method for extracting rare earth metals from an acidic slurry or acidic solution comprising:providing an acidic slurry or acidic solution;adding a composite comprising an extractant and a polymer resin;mixing the composite with the acidic slurry or acidic solution to form a mixture slurry or solution; andseparating the mixture slurry or solution into a rare-earth-metal-loaded composite and a raffinate slurry or solution,wherein the acidic slurry or acidic solution comprises at least one rare earth metal and at least one early transition metal selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), rhenium (Re), and/or at least one actinide metal selected from the group consisting of actinium (Ac), thorium (Th), protactinium (Pa), uranium (U), neptunium (Np), plutonium (Pu), americium (Am), curium (Cm), berkelium (Bk), californium (Cf), einsteinium (Es), fermium (Fm), mendelevium (Md), nobelium (No), and lawrencium (Lr).2. The method of claim 1 , wherein each of the early transition metals that is present in the acidic slurry or acidic solution is present in an amount of up to 50 claim 1 ,000 ppm claim 1 , and each of the actinide metals that is present in the acidic slurry or acidic solution is present in an amount of up to 5 claim 1 ,000 ppm.3. ...

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Номер записи: 85
26-03-2015 дата публикации

METHOD OF RECOVERING RARE-EARTH ELEMENTS

Номер: US20150086449A1
Автор: KOBAYASHI Yasushi, Oda Kazuhiro, Ojiri Masashi, Ota Yuji, SANO Hiroshi, Sugita Kaoru, Taguchi Yoshihiro, Takeda Satoshi
Принадлежит: NIPPON LIGHT METAL COMPANY, LTD.

Provided is a method of recovering rare-earth elements by which rare-earth elements can be recovered efficiently from a bauxite residue serving as a raw material and containing the rare-earth elements. Specifically provided is a method of recovering rare-earth elements from a raw material, the raw material being a bauxite residue produced as a by-product in a Bayer process, the method including: using a bauxite residue having a specific surface area of 35 m/g or more; adding, to the raw material bauxite residue, a liquid leaching agent formed of an aqueous solution of at least one kind of mineral acid selected from sulfuric acid, hydrochloric acid, nitric acid, and sulfurous acid, thereby preparing a slurry having a liquid-solid ratio of 2 to 30 and a pH of 0.5 to 2.2; subjecting the slurry to leaching treatment of the rare-earth elements under a temperature condition of room temperature to 160° C.; subjecting the slurry after the leaching treatment to solid-liquid separation, yielding a leachate; and separating and recovering the rare-earth elements from the leachate. 130-. (canceled)31. A method of recovering rare-earth elements from a raw material , the raw material being a bauxite residue produced as a by-product in a Bayer process for separating and collecting an aluminum component from bauxite ,the method comprising:{'sup': '2', 'using, as the raw material, a bauxite residue having a specific surface area of 35 m/g or more;'}adding, to the raw material bauxite residue, a liquid leaching agent formed of an aqueous solution of at least one kind of mineral acid selected from sulfuric acid, hydrochloric acid, nitric acid, and sulfurous acid, thereby preparing a slurry having a liquid-solid ratio of 2 to 30 and a pH of 0.5 to 2.2;subjecting the slurry to leaching treatment of the rare-earth elements under a temperature condition of room temperature to 160° C.;subjecting the slurry after the leaching treatment to solid-liquid separation, yielding a leachate; ...

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Номер записи: 86
12-03-2020 дата публикации

SEPARATION OF RARE EARTH METALS

Номер: US20200080169A1
Автор: Nockemann Peter, Ritesh Ruhela
Принадлежит:

A method for extracting a rare earth metal from a mixture of one or more rare earth metals, said method comprising contacting an acidic solution of the rare earth metal with a composition which comprises an ionic liquid to form an aqueous phase and a non-aqueous phase into which the rare earth metal has been selectively extracted. 2. The method of claim 1 , wherein the method comprises recovering the rare earth metal from the non-aqueous phase.3. The method of claim 2 , wherein the rare earth metal is recovered from the non-aqueous phase by stripping with an acidic stripping solution.4. The method of claim 3 , wherein the acidic stripping solution comprises an aqueous hydrochloric acid or nitric acid solution.5. The method of or claim 3 , wherein the acidic stripping solution has a pH of 1 or lower.6. The method of any one of to claim 3 , wherein the acidic stripping solution has a pH of 0 or higher.7. The method of any of to claim 3 , wherein the method comprises extracting a rare earth metal from a mixture of two or more rare earth metals.8. The method of any of to claim 3 , wherein the acidic solution comprises a first and a second rare earth metal claim 3 , and the method comprises:(a) preferentially partitioning the first rare earth metal into the non-aqueous phase.9. The method of claim 8 , wherein the method further comprises claim 8 , in step (a) claim 8 , separating the non-aqueous phase from the acidic solution; and(b) contacting the acidic solution depleted of the first rare earth metal with the composition which comprises an ionic liquid, and optionally recovering the second rare earth metal therefrom.10. The method of claim 9 , wherein the first rare earth metal is recovered from the non-aqueous phase in step (a) claim 9 , and said non-aqueous phase is recycled and used as the composition in step (b).11. The method of any one of to claim 9 , wherein the first rare earth metal is dysprosium claim 9 , and the second rare earth metal is neodymium.12. The ...

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Номер записи: 87
29-03-2018 дата публикации

METHOD FOR RECOVERING SCANDIUM

Номер: US20180087128A1
Автор: Asano Satoshi, Kobayashi Hiroshi, Kudo Keiji, Matsumoto Shin-ya, Nagai Hidemasa
Принадлежит: SUMITOMO METAL MINING CO., LTD.

According to this method for recovering scandium, an acidic solution containing scandium is used and a scandium dissolution liquid after purification is obtained by a double sulfate precipitation step, and scandium is recovered from the obtained scandium dissolution liquid, as follows: [A] A precipitation step wherein sodium sulfate is added into the acidic solution containing scandium, so that a precipitate of a scandium double sulfate is obtained; [B] A neutralization step wherein pure water is added to the precipitate of a scandium double sulfate obtained in the precipitation step to dissolve the precipitate of a scandium double sulfate therein, and scandium hydroxide is obtained by adding a neutralizing agent into the obtained dissolution liquid; and [C] A re-dissolution step wherein an acid is added to the scandium hydroxide obtained in the neutralization step, so that a scandium dissolution after purification, in which the scandium hydroxide is dissolved, is obtained. 1. A method for recovering scandium , comprising:obtaining a scandium solution after purification from an acidic solution containing scandium by a double sulfates precipitation step including the following steps [A] to [C]; andsubsequently recovering scandium from the scandium solution obtained:[A] a precipitation step of adding sodium sulfate to the acidic solution containing scandium to obtain a precipitate of double sulfates of scandium,[B] a neutralization step of adding pure water to the precipitate of double sulfates of scandium obtained in the precipitation step to dissolve the precipitate and adding a neutralizing agent to a resulting solution to obtain scandium hydroxide, and[C] a redissolution step of adding an acid to scandium hydroxide obtained in the neutralization step to obtain a scandium solution after purification having scandium hydroxide dissolved.2. The method for recovering scandium according to claim 1 , comprising an enrichment step of generating a precipitate of scandium ...

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Номер записи: 88
29-03-2018 дата публикации

METHOD OF PRODUCING HIGH-PURITY ERBIUM

Номер: US20180087136A1
Автор: Takahata Masahiro
Принадлежит:

A method of purifying erbium is provided to produce a high-purity erbium having a purity of 5N or higher excluding rare earth elements and gas components, and containing Al, Fe, Cu, and Ta each in an amount of 1 wtppm or less, W in an amount of 10 wtppm or less, carbon in an amount of 150 wtppm or less, alkali metals and alkali earth metals each in an amount of 1 wtppm or less, other transition metal elements in a total amount of 10 wtppm or less, and U and Th as radioactive elements each in an amount of 10 wtppb or less. Erbium has a high vapor pressure and is difficult to refine in a molten state. The method provides technology for efficiently and stably providing high-purity erbium, a sputtering target made of high-purity erbium, and a metal gate film having high-purity erbium as a main component thereof. 1. A method of producing high-purity erbium , comprising the steps of:subjecting coarse erbium to molten salt electrolysis to produce an electrodeposit; andsubjecting the electrodeposit to distillation to obtain a high-purity erbium having a purity of 5N or higher, excluding rare earth elements and gas components, and containing Al, Fe, Cu, and Ta each in an amount of 1 wtppm or less, W in an amount of 10 wtppm or less, carbon in an amount of 150 wtppm or less, alkali metals and alkali earth metals each in an amount of 1 wtppm or less, other transition metal elements in a total amount of 10 wtppm or less, and U and Th as radioactive elements each in an amount of 10 wtppb or less.2. The method according to claim 1 , wherein a molten salt for the molten salt electrolysis is prepared using potassium chloride (KCl) claim 1 , lithium chloride (LiCl) claim 1 , erbium chloride (ErCl) and erbium (Er) raw materials claim 1 , and the molten salt electrolysis is performed at a bath temperature of 700° C. or higher and 900° C. or less.3. The method according to claim 2 , wherein tantalum (Ta) is used as an anode and tantalum (Ta) or titanium (Ti) is used as a cathode of the ...

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Номер записи: 89
21-03-2019 дата публикации

RECOVERY OF PRECIOUS AND RARE EARTH METALS USING CYCLODEXTRIN

Номер: US20190085428A1
Автор: ARNOLD Dale F., PETTMAN Roger Bruce
Принадлежит: Cycladex Inc

This invention relates to methods for the recovery of precious metals such as gold, silver, platinum, palladium and rare earths from precious metal-bearing materials. In particular, a method of purifying precious metal from a precious metal-bearing material comprising the steps a) forming an aqueous acidic oxidant mixture from hydrogen peroxide an acid and a source of bromide ion, said acidic oxidant mixture having a pH in the range 0 to 6; b) contacting the acidic oxidant mixture with the precious metal bearing-material to oxidise the metal and form a metal bromide salt solution containing the metal bromide MBrn and/or MBrnwhere n is the valency of the oxidised metal ion M; c) controlling the metal bromide salt solution to a value in the range 3-7 by providing alkali metal ions A+ in the solution to form an alkali metal/metal bromide solution containing the salt AMBrnin solution; d) adding cyclodextrin to the alkali metal/metal bromide solution to precipitate a metal cyclodextrin complex; and e) recovering the metal cyclodextrin complex. 1. A method of purifying precious metal from a precious metal-bearing material comprising the stepsa) forming an aqueous acidic oxidant mixture from hydrogen peroxide an acid and a source of bromide ion, said acidic oxidant mixture having a pH in the range 0 to 6;b) contacting the acidic oxidant mixture with the precious metal bearing-material to oxidise the metal and form a metal bromide salt solution containing the metal bromide MBrn and/or MBrn+1− where n is the valency of the oxidised metal ion Mn+;c) controlling the metal bromide salt solution to a value in the range 3-7 by providing alkali metal ions A+ in the solution to form an alkali metal/metal bromide solution containing the salt AMBrn+1 in solution;d) adding cyclodextrin to the alkali metal/metal bromide solution to precipitate a metal cyclodextrin complex; ande) recovering the metal cyclodextrin complex2. A method according to claim 1 , wherein the precious metal is ...

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Номер записи: 90
12-05-2022 дата публикации

GENERATION OF RARE EARTH ELEMENTS FROM ORGANICALLY-ASSOCIATED LEACH SOLUTIONS

Номер: US20220144660A1
Автор: Laudal Daniel, Lucky Christine E., Theaker Nolan
Принадлежит:

A method for recovering rare earth elements (REE) from a leach solution. The method includes determining the concentration of a first plurality of contaminates in the leach solution, adding a first amount of oxalic acid to the leach solution and allowing it to react for a first period of time to form a first precipitant and a first liquor, maintaining the pH of the first liquor between 1.5 and 3 by the addition of an alkali base, removing the first precipitant, adding a second amount of oxalic acid to the first liquor and allowing it to react for a second period of time to form a second precipitant and a second liquor, maintaining the pH of the second liquor between 1.5 and 3 by the addition of the alkali base, and removing the second precipitant. 1. A method for recovering rare earth elements (REE) from a leach solution , the method comprising:determining the concentration of a first plurality of contaminates in the leach solution,adding a first amount of oxalic acid to the leach solution and allowing it to react for a first period of time to form a first precipitant and a first liquor,maintaining the pH of the first liquor between 1.5 and 3 by the addition of an alkali base,removing the first precipitant,adding a second amount of oxalic acid to the first liquor and allowing it to react for a second period of time to form a second precipitant and a second liquor,maintaining the pH of the second liquor between 1.5 and 3 by the addition of the alkali base, andremoving the second precipitant,wherein the first amount of oxalic acid is between 0.05 mol/L and 0.4 mol/L greater than concentration of the first plurality of contaminates in the leach solution.2. The method of claim 1 , further comprising the steps of:adding a third amount of oxalic acid to the second liquor and allowing it to react for a third period of time to form a third precipitant and a third liquor,maintaining the pH of the third liquor between 1.5 and 3 by the addition of the alkali base, andremoving ...

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Номер записи: 91
12-05-2022 дата публикации

METHOD FOR LEACHING RARE EARTH ELEMENTS AND CRITICAL MINERALS FROM ORGANICALLY ASSOCIATED MATERIALS

Номер: US20220145421A1
Автор: Laudal Daniel, Theaker Nolan
Принадлежит:

A method for extracting rare earth elements and critical minerals including adding an acid to a mixture comprising organically bound rare earth elements. The mixture is maintained at a pH of 0.25 to 4 for a period of time, resulting in a liquor and a leached mixture. The liquor is removed from the leached mixture to form a dewatered cake. The dewatered cake is washed to form a washing liquid. The washing liquid is recycled to create a second slurry comprising organically bound rare earth elements. 1. A method for extracting rare earth elements , critical minerals , or a combination thereof , the method comprising:adding an acid to a mixture comprising organically bound rare earth elements, critical minerals, or a combination thereof to maintain a pH of the mixture from 0.25 to 4 for a period of time, resulting in a liquor and a leached mixture;removing the liquor from the leached mixture to form a dewatered cake;washing the dewatered cake to form a washing liquid; andrecycling the washing liquid to create a second mixture comprising organically bound rare earth elements, critical minerals, or a combination thereof.2. The method of wherein the mixture comprises lignite coal claim 1 , subbituminous coal claim 1 , or bituminous coal.3. The method of wherein the mixture comprises clay sands claim 1 , peat claim 1 , biomass claim 1 , crude oil or a combination thereof.4. The method of wherein the acid has a concentration greater than 30 weight percent.5. The method of wherein the acid is a mineral acid.6. The method of wherein the pH is maintained between 0.5 and 2.7. The method of wherein the pH is maintained between 2 and 3.5.8. The method of wherein the period of time is between 10 minutes and 12 hours.9. The method of wherein the pH is continuously monitored.10. The method of wherein the liquor is removed from the leached mixture by filter press.11. The method of wherein the liquor is removed from the leached mixture by centrifuge.12. The method of wherein the ...

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Номер записи: 92
12-05-2022 дата публикации

PROCESS FOR MAKING MODIFIED DTPA-ASSOCIATED ORGANOSILICA MEDIA FOR USE IN SOLID-LIQUID EXTRACTION OF RARE EARTH ELEMENTS

Номер: US20220145422A1
Автор: Allen Matthew J., Dardona Mohammed, Dittrich Timothy M., Hovey Jessica L.
Принадлежит:

A process for making modified diethylenetriaminepentaacetic acid (DTPA)-associated media for use in solid-liquid extraction of rare earth elements is disclosed. The process includes functionalizing DTPA with hydrophobic groups to form modified DTPA; dissolving the modified DTPA into a methanol solution; loading the modified DTPA solution to a solid support; rotating the modified DTPA-loaded solid support to allow for association; and removing the methanol to obtain the modified-DTPA-associated media. 1. A modified DTPA-associated media for use in solid-liquid extraction , comprising modified diethylenetriaminepentaacetic acid (DTPA) chemically associated with a solid support , wherein the modified DTPA includes DTPA functionalized with hydrophobic groups.2. The modified DTPA-associated media of claim 1 , wherein the solid support is an organosilica platform.3. The modified DTPA-associated media of claim 1 , wherein the hydrophobic groups includes one or more alkyl groups.4. The modified DTPA-associated media of claim 1 , wherein the hydrophobic groups includes two hydrophobic ethylhexyl groups.6. A process for making modified diethylenetriaminepentaacetic acid (DTPA)-associated media for use in solid-liquid extraction of rare earth elements claim 1 , comprising:functionalizing DTPA with hydrophobic groups to form modified DTPA;dissolving the modified DTPA into a methanol solution;loading the modified DTPA solution to a solid support;rotating the modified DTPA-loaded solid support to allow for association; andremoving the methanol to obtain the modified-DTPA-associated media.7. The process of claim 6 , wherein the hydrophobic groups one or more alkyl groups.8. The process of claim 6 , wherein the hydrophobic groups includes two hydrophobic ethylhexyl groups.10. The process of claim 6 , wherein the solid support comprises an organosilica platform.11. The process of claim 6 , wherein rotating the modified DTPA-loaded solid support includes centrifuging the modified ...

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Номер записи: 93
16-04-2015 дата публикации

PROCESSES FOR RECOVERING RARE EARTH ELEMENTS AND RARE METALS

Номер: US20150104361A1
Автор: BOUDREAULT Richard, Dittrich Carsten, Krivanec Heinz, Labrecque-Gilbert Marie-Maxime, PRIMEAU Denis
Принадлежит:

There are provided processes for recovering at least one rare earth element. Such processes comprise obtaining an acidic composition comprising (i) at least one rare earth element and optionally at least one rare metal; and reacting the composition with a precipitating agent so as to substantially selectively precipitate a first rare earth element and optionally a first rare metal. For example, various rare earth elements (such as scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, etc) and various rare metals (such as indium, zirconium, lithium, gallium, etc.) can be extracted by using such processes. 1295-. (canceled)297. The process of claim 296 , wherein said acidic composition comprises (i) said at least one rare earth element and optionally said at least one rare metal and (ii) FeCl.298. The process of claim 297 , wherein said extracting agent is chosen from tri-butyl phosphate claim 297 , di-2-ethylhexyl phosphoric acid (HDEHP) claim 297 , bis(2 claim 297 ,4 claim 297 ,4-trimethylpentyl) phosphinic acid and 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester).299. The process of claim 296 , wherein said acidic composition is reacted with Fe(0) claim 296 , thereby obtaining a composition having a reduced content in Fe.300. The process of claim 296 , wherein said first rare earth element is scandium.301. The process of claim 300 , wherein said first rare metal is gallium and said first rare metal is substantially selectively precipitated with said first rare earth element.302. The process of claim 296 , wherein said precipitating agent is chosen from oxalic acid claim 296 , NaOH claim 296 , MgO claim 296 , CaCOand mixtures thereof.303. The process of claim 301 , wherein said precipitating agent is chosen from oxalic acid claim 301 , NaOH claim 301 , MgO claim 301 , CaCOand mixtures thereof.304. The process of claim 301 , wherein said ...

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Номер записи: 94
12-05-2022 дата публикации

Methods of producing enriched scandium-47, and related systems and apparatuses

Номер: US20220148752A1
Автор: Mathew S. Snow, Mathew T. Kinlaw
Принадлежит: Battelle Energy Alliance Llc

A method of producing enriched 47 Sc comprises irradiating a V structure comprising 51 V with at least one incident photon beam having an endpoint energy within a range of from about 14 MeV to about 44 MeV to convert at least some of the 51 V to 47 Sc and form a 47 Sc-containing structure. The 47 Sc of the 47 Sc-containing structure is separated from additional components of the 47 Sc-containing structure using a chromatography process. Systems and apparatuses for producing enriched 47 Sc are also described.

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Номер записи: 95
13-04-2017 дата публикации

Functionalized Adsorbents for the Recovery of Rare Earth Elements from Aqueous Media

Номер: US20170101698A1
Автор: Dzombak David A., Karamalidis Athanasios, Noack Clinton W., PERKINS KEDAR, Washburn Newell R.
Принадлежит: CARNEGIE MELLON UNIVERSITY, a Pennsylvania Non-Profit Corporation

The disclosure relates to the design and synthesis of selected ligands, dendrimers, polymers and other solid phase substrates for selective chelation of rare earth elements (i.e. lanthanides), and use of those selective ligands for synthesis of resins, polymers and other types of solid supports for separation and recovery of lanthanides from aqueous media. Recovery of critical elements from aqueous media occurs in a simple two-step process: pre-concentration of REE on the adsorbent and recovery by acid elution. The present invention can be used for design of selective ligands immobilized on solid substrates for extraction of various constituents, such as lanthanides, actinides, radionuclides, trace metals, etc., from aqueous media. 1. A method of recovering a rare earth element from aqueous media , comprising: a substrate, and', 'a material attached to a surface of the substrate, wherein the material selectively binds with at least one rare earth element;, 'providing an adsorbent, wherein the adsorbent comprisesexposing the adsorbent to the aqueous media, wherein the rare earth element binds to the material on the surface of the substrate;rinsing the adsorbent in an acid; andrecovering the rare earth element from the acid.2. The method of claim 1 , further comprising:exposing the adsorbent to the aqueous media after rinsing the adsorbent in the acid;rinsing the adsorbent again in a second acid; andrecovering the rare earth element from the second acid.3. The method of claim 1 , wherein the material is an ion imprinted polymer.4. The method of claim 1 , wherein the material is a ligand.5. The method of claim 4 , wherein the ligand is selected from the group consisting of diethylenetriaminepentaacetic acid claim 4 , diethylenetriaminepentaacetic dianhydride claim 4 , phosphonoacetic acid claim 4 , and N claim 4 ,N-bisphosphono(methyl)glycine.6. The method of claim 1 , wherein the substrate is silica gel.7. The method of claim 6 , wherein the silica gel contains ...

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Номер записи: 96
08-04-2021 дата публикации

METHODS AND COMPOSITIONS FOR EXTRACTION OF RARE EARTH ELEMENTS FROM COAL ASH

Номер: US20210102273A1
Автор: Sabolsky Edward M., Wildfire Christina, YAKABOYLU Gunes A., Zondlo John W.
Принадлежит:

In one aspect, the disclosure relates to a microwave-assisted comminution method for achieving more efficient beneficiation and later hydrometallurgical recovery of rare earth elements and other metals from coal fly ash particles. The method requires only a short processing time, is energy efficient, allows for better process control, and is environmentally advantageous compared to current methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure. 2. The method of claim 1 , wherein the carbon source comprises carbon black claim 1 , carbon lampblack claim 1 , activated carbon claim 1 , 50% compressed carbon acetylene black claim 1 , 90% compressed carbon acetylene black claim 1 , 100% compressed carbon acetylene black claim 1 , charcoal claim 1 , coal claim 1 , or a combination thereof.3. The method of claim 1 , wherein the carbon source comprises carbon lampblack.4. The method of claim 1 , wherein the coal ash particles and the carbon source are present in a ratio of from 95:5 vol % to 70:30 vol %.5. The method of claim 1 , wherein in step (c) claim 1 , mixing is accomplished by dry roll milling.6. The method of further comprising pressing the first mixture into a pellet as a step between steps (c) and (d).7. The method of claim 6 , wherein the pellet has a diameter of from 13 to 26 mm and a thickness of from 5 to 20 mm.8. The method of claim 6 , wherein the pressing into a pellet is pressing using a steel die; and wherein 13 to 14 MPa of uniaxial pressure is applied to the steel die to create the pellet.9. The method of claim 8 , wherein a lubricant is applied to the steel die prior to adding the first mixture to the steel die.10. The method of claim 1 , wherein the heating vessel is a crucible claim 1 , and wherein the crucible comprises alumina.11. The method of claim 1 , wherein microwave processing of the first mixture results in heating of the first mixture ...

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Номер записи: 97
02-06-2022 дата публикации

METHOD FOR PREPARING CARBON-FUNCTIONALIZED PR6O11

Номер: US20220169523A1
Автор: Hao Shiyou, Shang Juan, Wu Xuanyi, Xiao Zhonglian
Принадлежит:

A method for preparing carbon-functionalized praseodymium oxide includes the following steps: dissolving Pr(NO)HO in an acid dye solution and stirring to form a mixed solution; adding NHHO dropwise in the mixed solution while stirring to adjust a pH value of the mixed solution, thereby forming a suspension, and then aging the suspension for 2 to 4 hours; filtering, washing with water, washing with alcohol, and drying the aged suspension to obtain a carbon-functionalized PrOprecursor; and placing the carbon-functional zed PrOprecursor in a tube furnace under a protection of nitrogen, heating the carbon-functionalized PrOprecursor to a sintering temperature at a heating rate of 4 to 6 degrees Celsius/min, keeping at the sintering temperature for 3 to 4 hours, and then cooling to room temperature, thereby obtaining the carbon-functionalized. PrO. 1. A method for preparing carbon-functionalized PrOcomprising:{'sub': 3', '3', '2, 'dissolving Pr(NO).6HO in an acid dye solution and stirring to form a mixed solution;'}{'sub': 3', '2, 'adding NH.HO dropwise in the mixed solution while stirring to adjust a pH value of the mixed solution, thereby forming a suspension, and then aging the suspension for 2 to 4 hours;'}{'sub': 6', '11, 'filtering, washing with water, washing with alcohol, and drying the aged suspension to obtain a carbon-functionalized PrOprecursor; and'}{'sub': 6', '11', '6', '11', '6', '11, 'placing the carbon-functionalized PrOprecursor in a tube furnace and under a protection of nitrogen, heating the carbon-functionalized PrOprecursor to a sintering temperature at a heating rate of 4 to 6 degrees Celsius/min, keeping at the sintering temperature for 3 to 4 hours, and then cooling to room temperature, thereby obtaining the carbon-functionalized PrO.'}2. The method for preparing carbon-functionalized PrOof claim 1 , wherein the acid dye solution comprises at least one acid dye selected from a grouts consisting of Acid Red 14 claim 1 , Acid Red 17 claim 1 , and ...

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Номер записи: 98
03-07-2014 дата публикации

METHOD FOR RECOVERING RARE EARTH ELEMENT

Номер: US20140186239A1
Автор: Hoshi Hiroyuki, KIKUGAWA Atsushi
Принадлежит: HITACHI METALS, LTD.

An object of the present invention is to provide a method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element, which can be put into practical use as a low-cost, simple recycling system. The method of the present invention as a means for resolution is characterized by including at least a step of separating a rare earth element in the form of an oxide from an iron group element by subjecting a workpiece to an oxidation treatment, then turning the treatment environment into an environment where carbon is present, and subjecting the oxidation-treated workpiece to a heat treatment at a temperature of 1150° C. or more. 1. A method for recovering a rare earth element from a workpiece containing at least a rare earth element and an iron group element , characterized by including at least a step of separating a rare earth element in the form of an oxide from an iron group element by subjecting a workpiece to an oxidation treatment , then turning the treatment environment into an environment where carbon is present , and subjecting the oxidation-treated workpiece to a heat treatment at a temperature of 1150° C. or more.2. The method according to claim 1 , characterized in that in the heat treatment of the oxidation-treated workpiece in the presence of carbon claim 1 , a carbon crucible is used as a treatment container and a carbon supply source.3. The method according to claim 1 , characterized in that in the heat treatment of the oxidation-treated workpiece in the presence of carbon claim 1 , a carbon supply source is added to a non-carbon treatment container.4. The method according to claim 1 , characterized in that at least part of the workpiece is in granular or powder form having a particle size of 500 μm or less.5. The method according to claim 1 , characterized in that the workpiece is an R—Fe—B based permanent magnet.6. The method according to claim 5 , characterized in that the step of separating a ...

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Номер записи: 99
21-04-2016 дата публикации

METHOD FOR RECOVERING RARE EARTH ELEMENT

Номер: US20160108498A1
Автор: Hoshi Hiroyuki, MIYAMOTO Yu
Принадлежит: HITACHI METALS, LTD.

An object of the present invention is to provide a method according to which a rare earth element can be efficiently recovered from a workpiece containing at least a rare earth element and an iron group element, and also wear and damage to the treatment container can be suppressed, allowing the container to be used repeatedly for a long period of time. The method of the present invention as a means for resolution is characterized in that in the heat treatment of an oxidation-treated workpiece in the presence of carbon, when the oxidation-treated workpiece is placed in a treatment container, a carbon substance is interposed between the oxidation-treated workpiece and the bottom surface of the container, and the heat treatment is performed in an inert gas atmosphere or in vacuum at a temperature of 1300° C. or more. 1. A method for recovering a rare earth element , comprising subjecting a workpiece containing at least a rare earth element and an iron group element to an oxidation treatment , then turning the treatment environment into an environment where carbon is present , and subjecting an oxidation-treated workpiece to a heat treatment , thereby separating a rare earth element in the form of an oxide from an iron group element ,the method being characterized in that in the heat treatment of the oxidation-treated workpiece in the presence of carbon, when the oxidation-treated workpiece is placed in a treatment container, a carbon substance is interposed between the oxidation-treated workpiece and the bottom surface of the container, and the heat treatment is performed in an inert gas atmosphere or in vacuum at a temperature of 1300° C. or more.2. The method according to claim 1 , characterized in that at least part of the workpiece is in granular or powder form having a particle size of 500 μm or less.3. The method according to claim 1 , characterized in that the workpiece has an iron group element content of 30 mass % or more.4. The method according to claim 1 , ...

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Номер записи: 100