METHOD OF EXTRACTING RARE-EARTH METALS FROM AQUEOUS SOLUTIONS Russian patent published in 2013 - IPC C22B59/00 C22B3/26 

Abstract RU 2484163 C1

FIELD: metallurgy.

SUBSTANCE: proposed method comprises extraction of rare-earth metal cations by organic phase including extragent solution in inert diluter. Naphthenic acid is used as said extragent. Kerosene is used as inert diluter. Extraction is conducted in three stages at relationship between organic and aqueous phases O:A=1·(9-11) at every stage. Note here that, at first stage, europium cations (III) are extracted at content of naphthenic acid in kerosene of 10-13 vol. % and aqueous solution pH 5.0-5.1. At second stage, samarium cations (III) are extracted at content of naphthenic acid in kerosene of 13-16 vol. % and aqueous solution pH 4.6-4.7. At third stage cerium and lanthanum cations (III) are extracted at the same content of extragent and pH 5.0-5.1.

EFFECT: higher yield.

4 dwg, 1 ex

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RU 2 484 163 C1

Authors

Chirkst Dmitrij Ehduardovich

Litvinova Tat'Jana Evgen'Evna

Lutskij Denis Sergeevich

Lutskaja Veronika Aleksandrovna

Zhukov Stanislav Viktorovich

Dates

2013-06-10Published

2012-04-03Filed