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1 817 439

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IPC

(21) (22)

Application

4924218/26, 1991-04-01

(22)

Actual filing date

1991-04-01

(45)

Published

1994-06-15

(72)

Inventor

Gol'Dinov A.L.Denisov A.K.Novoselov F.I.Abramov O.B.Zakharova O.M.Utkin V.V.Sezemin V.A.Vandyshev S.A.

METHOD OF SODIUM FLUOSILICATE PRODUCING Russian patent published in 1994 - IPC

Abstract SU 1817439 A1

FIELD: chemical technology. SUBSTANCE: natural calcium phosphate is treated with nitric acid, extract is cooled, and calcium nitrate is isolated. Sodium sulfate is treated preliminary in aqueous medium with part of calcium nitrate obtained after extract cooling. EFFECT: mother liquor obtained is used for precipitation of the end product. 2 cl, 1 tbl

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SU 1 817 439 A1

Authors

Gol'Dinov A.L.

Denisov A.K.

Novoselov F.I.

Abramov O.B.

Zakharova O.M.

Utkin V.V.

Sezemin V.A.

Vandyshev S.A.

Dates

1994-06-15—Published

1991-04-01—Filed