METHOD OF STRONTIUM AND RARE-EARTH ELEMENTS EXTRACTION Russian patent published in 1995 - IPC

Abstract RU 2027671 C1

FIELD: processing of rare-earth elements waste. SUBSTANCE: aqueous phase has 1 mole/l nitric acid, 4 g/l rare-earth elements, 0.5 g/l strontium. Organic phase has 0.1 M/l dicyclohexyl-18-crawn-6 ether and 0.8 M/l different radical phosphine oxide. Phases were mixed for 3 min. Strontium and rare-earth elements were extracted in organic phase. Only strontium is extracted in organic phase at nitric acid content in the aqueous phase above 2 M/l. EFFECT: improved method of extraction. 2 cl, 3 tbl

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RU 2 027 671 C1

Authors

Prokopchuk Ju.Z.

Logunov M.V.

Trukhanov S.Ja.

Dates

1995-01-27—Published

1990-12-19—Filed