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Application

4752938/28, 1989-10-24

(22)

Actual filing date

1989-10-24

(45)

Published

1996-02-20

(72)

Inventor

Gol'Dinov A.L.Denisov A.K.Novoselov F.I.Utkin V.V.Sezemin V.A.Abramov O.B.Zakharova O.M.Kiselevich P.V.Naumov A.A.

METHOD FOR PURIFICATION OF SOLUTION OF CALCIUM NITRATE Russian patent published in 1996 - IPC

Abstract SU 1830888 A1

FIELD: production of calcium salts. SUBSTANCE: origin solution of calcium nitrate having concentration 2-25 vol % is treated by ammonium carbonate. The process is carried out till not more than 20 % of Ca2+ being presented in solution precipitates. Residual portion of the solution is treated by thus obtained mixture. Purification degree against fluorine is more 90 %. EFFECT: increases productivity of the method. 2 cl, 1 tbl

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SU 1 830 888 A1

Authors

Gol'Dinov A.L.

Denisov A.K.

Novoselov F.I.

Utkin V.V.

Sezemin V.A.

Abramov O.B.

Zakharova O.M.

Kiselevich P.V.

Naumov A.A.

Dates

1996-02-20—Published

1989-10-24—Filed

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