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2 193 526

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IPC

(21) (22)

Application

2000118483/12, 2000-07-11

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Start date

2000-07-11

(22)

Actual filing date

2000-07-11

(45)

Published

2002-11-27

(72)

Inventor

Kulikov B.P.Grinberg I.S.Skornjakov V.I.Ragozin L.V.Maksjutov E.N.Efimov A.A.Gorkovenko V.I.Borovik V.A.Tenigin A.Ju.Rzhechitskij Eh.P.Kozlova L.S.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Aljuminevaja Kompanija"

CRYOLITE PRODUCTION PROCESS Russian patent published in 2002 - IPC

Abstract RU 2193526 C2

FIELD: nonferrous metallurgy. SUBSTANCE: sodium fluoride-sodium bicarbonate solution and aluminate solution, formed at aluminum production plants, are continuously mixed and crystallized to give cryolite, which is then dehydrated and dried. Aluminate solution to be mixed is taken in dependence on concentration of sodium bicarbonate and sodium fluoride in their solution, their ratio, consumption of this solution, and concentration of alumina in aluminate solution. EFFECT: increased yield and improved quality of product. 3 tbl

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RU 2 193 526 C2

Authors

Kulikov B.P.

Grinberg I.S.

Skornjakov V.I.

Ragozin L.V.

Maksjutov E.N.

Efimov A.A.

Gorkovenko V.I.

Borovik V.A.

Tenigin A.Ju.

Rzhechitskij Eh.P.

Kozlova L.S.

Dates

2002-11-27—Published

2000-07-11—Filed