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2 031 845

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IPC

(21) (22)

Application

5027425/26, 1991-07-09

(22)

Actual filing date

1991-07-09

(45)

Published

1995-03-27

(72)

Inventor

Poljakova Ljudmila Fedorovna[Ua]Kadochnikov Vitalij Aleksandrovich[Ua]Korovin Jurij Fedorovich[Ua]Simonov Jurij Aleksandrovich[Ua]Lindt Konstantin Al'Bertovich[Ua]Chizhevskaja Svetlana Vladimirovna[Ru]Chekmarev Aleksandr Mikhajlovich[Ru]

(73)

Holder

Proizvodstvennoe Ob"Edinenie Khimicheskij Zavod"

METHOD OF ZIRCONIUM HYDROXIDE PREPARING Russian patent published in 1995 - IPC

Abstract RU 2031845 C1

FIELD: chemical technology. SUBSTANCE: zirconium hydroxide is precipitated from zirconium nitrate solution containing 150-200 g/l zirconium and 350-430 g/l nitric acid with 20-25% ammonia solution taken at stoichiometric quantity. Intermediate exposition of hydroxide gel formed at pH 2.4-2.8 is 5-10 min. Then precipitate is filtered off, washed with water at 80-95 C and dried. EFFECT: improved method of zirconium hydroxide preparing. 1 tbl

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RU 2 031 845 C1

Authors

Poljakova Ljudmila Fedorovna[Ua]

Kadochnikov Vitalij Aleksandrovich[Ua]

Korovin Jurij Fedorovich[Ua]

Simonov Jurij Aleksandrovich[Ua]

Lindt Konstantin Al'Bertovich[Ua]

Chizhevskaja Svetlana Vladimirovna[Ru]

Chekmarev Aleksandr Mikhajlovich[Ru]

Dates

1995-03-27—Published

1991-07-09—Filed