RU99125620A - METHOD FOR PRODUCING LITHIUM CONTAINING FLUORIDE SALTS FOR ELECTROLYTIC PRODUCTION OF ALUMINUM - Google Patents

METHOD FOR PRODUCING LITHIUM CONTAINING FLUORIDE SALTS FOR ELECTROLYTIC PRODUCTION OF ALUMINUM

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Publication number
RU99125620A
RU99125620A RU99125620/12A RU99125620A RU99125620A RU 99125620 A RU99125620 A RU 99125620A RU 99125620/12 A RU99125620/12 A RU 99125620/12A RU 99125620 A RU99125620 A RU 99125620A RU 99125620 A RU99125620 A RU 99125620A
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RU
Russia
Prior art keywords
lithium
solution
sorbent
brine
concentrated
Prior art date
Application number
RU99125620/12A
Other languages
Russian (ru)
Other versions
RU2184704C2 (en
Inventor
Александр Дмитриевич Рябцев
Людмила Анатольевна Серикова
Наталья Павловна Коцупало
Андрей Гельевич Вахрамеев
Сергей Анатольевич Беляев
Original Assignee
Закрытое акционерное общество "ТехРас"
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Publication date
Application filed by Закрытое акционерное общество "ТехРас" filed Critical Закрытое акционерное общество "ТехРас"
Priority to RU99125620A priority Critical patent/RU2184704C2/en
Priority claimed from RU99125620A external-priority patent/RU2184704C2/en
Publication of RU99125620A publication Critical patent/RU99125620A/en
Application granted granted Critical
Publication of RU2184704C2 publication Critical patent/RU2184704C2/en

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Claims (3)

1. Способ получения литийсодержащих фтористых солей для электролитического производства алюминия, включающий смешение литий и фторсодержащего реагентов, отличающийся тем, что в качестве литийсодержащего реагента используют раствор хлористого лития, полученный путем селективной сорбции лития из природного рассола на неорганическом сорбенте, отмывки сорбента от рассола и десорбции хлорида лития деминерализованной водой, причем отмывку неорганического сорбента от рассола ведут до остаточного содержания последнего в слое сорбента, позволяющего обеспечить содержание хлорида лития в десорбате по отношению к сумме всех хлоридов 50-85% отн., десорбат концентрируют любым известным способом до достижения концентрации в нем LiCl 40-50 кг/м3 и в течение 40-60 мин при постоянном перемешивании вводят в раствор, содержащий стехиометрически необходимое количество фтор-ионов, обеспечивающее осаждение фторидов лития, кальция, магния, образующуюся пульпу нерастворимых фторидов сгущают в течение 60-90 минут, маточный хлоридный раствор сливают, а образовавшийся осадок обезвоживают и сушат при нагревании.1. A method of producing lithium-containing fluoride salts for the electrolytic production of aluminum, comprising mixing lithium and fluorine-containing reagents, characterized in that a lithium chloride solution obtained by selective sorption of lithium from natural brine on an inorganic sorbent, washing the sorbent from brine and desorption is used as a lithium-containing reagent lithium chloride with demineralized water, moreover, washing the inorganic sorbent from brine is carried out to the residual content of the latter in the sorbent layer, according to Will provide a content of lithium chloride in desorbate with respect to the sum of all chlorides 50-85% rel., desorbate is concentrated by any known manner to achieve a concentration therein LiCl 40-50 kg / m 3 and for 40-60 min with continuous stirring is introduced into the a solution containing stoichiometrically the required amount of fluoride ions, ensuring the precipitation of lithium, calcium, magnesium fluorides, the resulting pulp of insoluble fluorides is concentrated within 60-90 minutes, the mother liquor is drained, and the precipitate formed is dehydrated and dried at heating up. 2. Способ по п.1, отличающийся тем, что в качестве фторсодержащего реагента используют раствор фтористого натрия или его водную суспензию с содержанием 40-80 кг/м3 NaF, получаемые прямым контактом раствора гидроксида натрия с концентрированной плавиковой кислотой.2. The method according to claim 1, characterized in that the solution of sodium fluoride or its aqueous suspension with a content of 40-80 kg / m 3 NaF, obtained by direct contact of a solution of sodium hydroxide with concentrated hydrofluoric acid, is used as a fluorine-containing reagent. 3. Способ по пп.1, 2, отличающийся тем, что для получения NaF используют гидроксид натрия, полученный путем мембранного электролиза маточного раствора после отделения фтористых солей с содержанием хлорида натрия в количестве 35-50 кг/м3.3. The method according to PP.1, 2, characterized in that to obtain NaF using sodium hydroxide obtained by membrane electrolysis of the mother liquor after separation of fluoride salts with sodium chloride in the amount of 35-50 kg / m 3 .
RU99125620A 1999-12-06 1999-12-06 Method of preparing lithium-containing fluoride salts for electrolytic aluminum production RU2184704C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU99125620A RU2184704C2 (en) 1999-12-06 1999-12-06 Method of preparing lithium-containing fluoride salts for electrolytic aluminum production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU99125620A RU2184704C2 (en) 1999-12-06 1999-12-06 Method of preparing lithium-containing fluoride salts for electrolytic aluminum production

Publications (2)

Publication Number Publication Date
RU99125620A true RU99125620A (en) 2001-11-10
RU2184704C2 RU2184704C2 (en) 2002-07-10

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RU99125620A RU2184704C2 (en) 1999-12-06 1999-12-06 Method of preparing lithium-containing fluoride salts for electrolytic aluminum production

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2075066B1 (en) 2007-12-10 2016-08-17 Honeywell International Inc. Method for making catalyst compositions of alkali metal halide-doped bivalent metal fluorides and a process for making fluorinated olefins

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