RU2012123103A - METHOD FOR RARE-EARTH ELEMENTS EXTRACTION FROM HYDRATE-PHOSPHATE SEDIMENTS OF APATIT PROCESSING - Google Patents

METHOD FOR RARE-EARTH ELEMENTS EXTRACTION FROM HYDRATE-PHOSPHATE SEDIMENTS OF APATIT PROCESSING Download PDF

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Publication number
RU2012123103A
RU2012123103A RU2012123103/05A RU2012123103A RU2012123103A RU 2012123103 A RU2012123103 A RU 2012123103A RU 2012123103/05 A RU2012123103/05 A RU 2012123103/05A RU 2012123103 A RU2012123103 A RU 2012123103A RU 2012123103 A RU2012123103 A RU 2012123103A
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Russia
Prior art keywords
calcium
strontium
ree
freezing
nitric acid
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RU2012123103/05A
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Russian (ru)
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RU2524966C2 (en
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Александр Васильевич Вальков
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Александр Васильевич Вальков
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

1. Способ извлечения редкоземельных элементов из азотно-фосфорнокислых растворов переработки апатита, включающий растворение апатита в азотной кислоте, вымораживание нитрата кальция (стронция), осаждение гидрато-фосфатов РЗЭ и кальция(стронция), растворение осадка в азотной кислоте, последующую экстракцию РЗЭ трибутилфосфатом в присутствии нитрата кальция, промывку и реэкстракцию, отличающийся тем, что после растворения осадка в раствор вводят нагретый до 40-50°С, полученный на стадии вымораживания нитрат кальция (стронция) до концентрации 800-1000 г/л, содержание РЗЭ (в расчете на оксиды) поддерживают равным 40-60 г/л, а избыточной азотной кислоты 1-2 моль/л, экстракт промывают упаренным реэкстрактом до концентрации по РЗЭ 250-300 г/л, 70-90% которого выводят в виде готовой продукции, а остальной раствор направляют на промывку, рафинат, содержащий нитраты кальция и примеси железа и алюминия, направляют на регенерацию нитрата кальция (стронция) вымораживанием или осаждением примесей оксидом кальция.2. Способ по п.1, отличающийся тем, что применяют 90-100% (об.) раствор трибутилфосфата в инертных разбавителях.1. A method for extracting rare earth elements from nitric-phosphoric acid solutions of apatite processing, including dissolving apatite in nitric acid, freezing calcium nitrate (strontium), precipitation of hydrate-phosphates of REE and calcium (strontium), dissolving the precipitate in nitric acid, subsequent extraction of REE into tributyl presence of calcium nitrate, washing and re-extraction, characterized in that after dissolution of the precipitate, calcium (strontium) nitrate, heated to 40-50 ° C, obtained at the freezing stage to a concentration of 800-1000 g / l, the content of REE (calculated on oxides) are maintained equal to 40-60 g / l, and excess nitric acid is 1-2 mol / l, the extract is washed with one stripped off reextract to a REE concentration of 250-300 g / l, 70-90% of which is withdrawn as a finished product, and the rest the solution is sent for washing, the raffinate containing calcium nitrates and impurities of iron and aluminum is sent to the regeneration of calcium nitrate (strontium) by freezing or precipitation of impurities ok calcium soda. 2. The method according to claim 1, characterized in that a 90-100% (vol.) Solution of tributyl phosphate in inert diluents is used.

Claims (2)

1. Способ извлечения редкоземельных элементов из азотно-фосфорнокислых растворов переработки апатита, включающий растворение апатита в азотной кислоте, вымораживание нитрата кальция (стронция), осаждение гидрато-фосфатов РЗЭ и кальция(стронция), растворение осадка в азотной кислоте, последующую экстракцию РЗЭ трибутилфосфатом в присутствии нитрата кальция, промывку и реэкстракцию, отличающийся тем, что после растворения осадка в раствор вводят нагретый до 40-50°С, полученный на стадии вымораживания нитрат кальция (стронция) до концентрации 800-1000 г/л, содержание РЗЭ (в расчете на оксиды) поддерживают равным 40-60 г/л, а избыточной азотной кислоты 1-2 моль/л, экстракт промывают упаренным реэкстрактом до концентрации по РЗЭ 250-300 г/л, 70-90% которого выводят в виде готовой продукции, а остальной раствор направляют на промывку, рафинат, содержащий нитраты кальция и примеси железа и алюминия, направляют на регенерацию нитрата кальция (стронция) вымораживанием или осаждением примесей оксидом кальция.1. A method of extracting rare earth elements from nitric phosphate solutions of apatite processing, including dissolving apatite in nitric acid, freezing calcium nitrate (strontium), precipitating REE and calcium hydrate phosphates (strontium), dissolving the precipitate in nitric acid, subsequent extraction of REE tributyl the presence of calcium nitrate, washing and re-extraction, characterized in that after dissolving the precipitate, a solution of calcium nitrate (strontium) obtained at the stage of freezing is added to a concentration of II 800-1000 g / l, the REE content (calculated as oxides) is maintained equal to 40-60 g / l, and the excess nitric acid is 1-2 mol / l, the extract is washed with an evaporated reextract to a concentration of REE 250-300 g / l 70-90% of which is withdrawn as a finished product, and the rest of the solution is sent for washing, the raffinate containing calcium nitrates and impurities of iron and aluminum are sent to the regeneration of calcium nitrate (strontium) by freezing or precipitation of impurities with calcium oxide. 2. Способ по п.1, отличающийся тем, что применяют 90-100% (об.) раствор трибутилфосфата в инертных разбавителях. 2. The method according to claim 1, characterized in that a 90-100% (vol.) Solution of tributyl phosphate in inert diluents is used.
RU2012123103/05A 2012-06-05 2012-06-05 Method of extracting rare-earth elements from hydrate-phosphate residues from apatite processing RU2524966C2 (en)

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RU2607284C1 (en) * 2015-08-17 2017-01-10 Лидия Алексеевна Воропанова Method of extracting ions from aqueous solutions
RU2631440C1 (en) * 2016-12-01 2017-09-22 Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук" (ФИЦ КНЦ СО РАН, КНЦ СО РАН) Method of extracting silver from chloride solutions

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US3647361A (en) * 1969-12-03 1972-03-07 Molybdenum Corp Two-stage countercurrent leaching process for the recovery of phosphates, yttrium and rare earth values
RU2049133C1 (en) * 1992-11-19 1995-11-27 Науменко Николай Александрович Method of extraction of rare-earth metals from their mixtures
RU2120408C1 (en) * 1997-04-02 1998-10-20 Институт химии и технологии редких элементов и минерального сырья Кольского научного центра РАН Method of extraction of rare-earth element phosphates from apatite concentrate
RU2118613C1 (en) * 1997-06-04 1998-09-10 Александр Васильевич Вальков Method of rare-earth elements extraction
RU2165653C1 (en) * 1999-08-09 2001-04-20 Государственное унитарное предприятие Научно-производственное объединение "Радиевый институт им. В.Г. Хлопина" Method for extracting transplutonium and rare earth elements from acid solutions and for their separation

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