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2 031 967

(13)

C1

(51)

IPC

(21) (22)

Application

5036536/02, 1992-04-08

(22)

Actual filing date

1992-04-08

(45)

Published

1995-03-27

(72)

Inventor

Bojchenko V.G.Sedneva T.A.Stangrit P.T.Tjuljunov I.P.

(73)

Holder

Institut Khimii I Tekhnologii Redkikh Ehlementov I Mineral'Nogo Syr'Ja Kol'Skogo Nauchnogo Tsentra Ran

METHOD OF PREPARING OF POTASSIUM FLUOROTANTALATE Russian patent published in 1995 - IPC

Abstract RU 2031967 C1

FIELD: chemical technology. SUBSTANCE: precipitation is carried out in electrolyzer with intermembranous space separated from cathode site by anion-exchange membrane, and from anode site - by cation-exchange membrane. Process is carried out by feeding of tantalum-containing solution in cathode space at the rate 4,1-8,2 g/A ·4 Ta2O5, and potassium fluoride solution in intermembranous space at the rate 2.2-4.4 g/A x 2 h KF, and hydrofluoric acid solution in anode space. Precipitation is carried out at 40-60 C. EFFECT: improved method of product preparing. 3 cl, 1 tbl

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RU 2 031 967 C1

Authors

Bojchenko V.G.

Sedneva T.A.

Stangrit P.T.

Tjuljunov I.P.

Dates

1995-03-27—Published

1992-04-08—Filed

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