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2 064 894

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IPC

(21) (22)

Application

94026006/26, 1994-07-12

(22)

Actual filing date

1994-07-12

(45)

Published

1996-08-10

(72)

Inventor

Olejnikova Behlla Il'InichnaMakarova Ljudmila IvanovnaKuznetsov Aleksandr Ivanovich

(73)

Holder

Olejnikova Behlla Il'InichnaMakarova Ljudmila IvanovnaKuznetsov Aleksandr Ivanovich

METHOD OF CERIUM SALT AQUEOUS SOLUTION PURIFICATION Russian patent published in 1996 - IPC

Abstract RU 2064894 C1

FIELD: chemical technology, rare-earth elements. SUBSTANCE: aqueous solution of cerium salts containing microimpurities of alkaline-earth elements, lead, iron, manganese and others is passed through macroporous cation-exchange resin with phosphoric acid groups. Rate of solution passing is 0.05-0.20 cm³/cm² x min. Cerium carbonate is precipitated from purified solution at pH = 4.5-5.5. EFFECT: improved method of purification. 1 tbl, 8 ex

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RU 2 064 894 C1

Authors

Olejnikova Behlla Il'Inichna

Makarova Ljudmila Ivanovna

Kuznetsov Aleksandr Ivanovich

Dates

1996-08-10—Published

1994-07-12—Filed