Process for separation of the rare earths by solvent extraction

Details Process for separation of the rare earths by solvent extraction Process for separation of the rare earths by solvent extraction

1975-09-08

1977-04-05

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Rare earth metal

75101BE, 4236585, C01F 1700

Patent

active

040162370

ABSTRACT:
Production rates for solvent extraction separation of the rare earths and yttrium from each other can be improved by the substitution of di(2-ethylhexyl) mono-thiophosphoric acid for di(2-ethylhexyl) phosphoric acid. The di(2-ethylhexyl) mono-thiophosphoric acid does not form an insoluble polymer at approximately 50% saturation as does the former extractant, permitting higher feed solution concentration and thus greater throughput.

REFERENCES:
patent: 2955913 (1960-11-01), Peppard et al.
patent: 3110556 (1963-11-01), Peppard et al.
patent: 3524723 (1970-08-01), Millsap et al.
Marcus et al., "Ion Exchange & Solvent Extraction of Metal Complexes", Wiley-Interscience, N.Y., 1969, pp. 521-526.
Levin et al., "Chemical Abstracts", vol. 79, 1973, No. 108604v.
Tukhin et al., "Chemical Abstracts", vol. 83, 1975, No. 21544j.

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