Recovery of rare earth elements from sulphurous acid solution by

Details Recovery of rare earth elements from sulphurous acid solution by Recovery of rare earth elements from sulphurous acid solution by

1989-07-18

1991-05-14

Andrews, Melvin J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Rare earth metal

423DIG14, C01F 1700

Patent

active

050154478

ABSTRACT:
A process is described for the recovery of rare earth elements from a sulphurous acid solution containing them. The rare earth elements can be successfully separated and recovered by solvent extraction from the sulphurous acid solution, being an organo-phosphorus compound as extraction agent. Di-2-ethylhexyl phosphoric acid or 2-ethylhexyl phosphonic acid mono-ethylhexyl ester is preferred as extraction agent.

REFERENCES:
patent: 4041125 (1977-08-01), Alstad et al.
patent: 4808384 (1989-02-01), Vanderpool et al.

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