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2 028 275

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IPC

(21) (22)

Application

5031203/26, 1992-01-04

(22)

Actual filing date

1992-01-04

(45)

Published

1995-02-09

(72)

Inventor

Bondarev Aleksandr Aleksandrovich[Kz]Segeda Irina Aleksandrovna[Kz]Botalov Anatolij Anisimovich[Kz]Kazantsev Valerij Nikolaevich[Kz]Kazantseva Galina L'Vovna[Kz]

(73)

Holder

Irtyshskij Khimiko-Metallurgicheskij Zavod

METHOD OF PREPARING OF RARE-EARTH METAL COMPOUNDS Russian patent published in 1995 - IPC

Abstract RU 2028275 C1

FIELD: rare-earth metals. SUBSTANCE: nitric acid solution of rare-earth metals has a composition of total rare-earth metals 300-350 g/l, nitric acid 40 g/l, not more. Solution is treated with sewage of rare metal production containing 60-120 g/l fluoride ion and 2.0 vol.% free ammonia (not more). Precipitate is filtered and dried. EFFECT: improved method of rare-earth metal compounds preparing. 6 tbl

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RU 2 028 275 C1

Authors

Bondarev Aleksandr Aleksandrovich[Kz]

Segeda Irina Aleksandrovna[Kz]

Botalov Anatolij Anisimovich[Kz]

Kazantsev Valerij Nikolaevich[Kz]

Kazantseva Galina L'Vovna[Kz]

Dates

1995-02-09—Published

1992-01-04—Filed