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1 656 831

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IPC

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Application

4716966/26, 1989-07-10

(22)

Actual filing date

1989-07-10

(45)

Published

1994-05-30

(72)

Inventor

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

METHOD OF PURIFICATION OF CALCIUM NITRATE SOLUTION Russian patent published in 1994 - IPC

Abstract SU 1656831 A1

FIELD: chemical technology, calcium salt production. SUBSTANCE: for purification of parent calcium nitrate solution from fluorine and phosphorus it is treated with ammonium carbonate solution at 70-85 C, and the precipitate of impurities is separated. Value pH in suspension formed is maintained at the range 3.6-4.3. Method ensures to decrease the content of fluorine and phosphorus in the calcium nitrate solution by 1.2-1.8 time. EFFECT: enhanced degree of purification. 1 tbl

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SU 1 656 831 A1

Authors

Gol'Dinov A.L.

Novoselov F.I.

Utkin V.V.

Sezemin V.A.

Abramov O.B.

Zakharova O.M.

Kiselevich P.V.

Naumov A.A.

Dates

1994-05-30—Published

1989-07-10—Filed