METHOD OF EXTRACTION OF RARE-EARTH METALS FROM THEIR MIXTURES Russian patent published in 1995 - IPC

Abstract RU 2049133 C1

FIELD: metallurgy. SUBSTANCE: from an aqueous solution of rare-earth metals the part of extract is removed followed by its countercurrent extraction for three stages: at ratio O:B= (1-3):1 at the first stage; O:B (3-5): 1 at the second stage and removal of part of organic solution and its feeding to the main cycle, and ratio O:B (5-10):1 at the third stage. EFFECT: improved method of extraction.

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RU 2 049 133 C1

Authors

Naumenko N.A.

Malinin A.A.

Tkachev Ju.I.

Trofimov V.I.

Jakovlev A.V.

Danilov V.V.

Krotkov V.V.

Medvedev A.D.

Dates

1995-11-27Published

1992-11-19Filed