Liquid/liquid extraction of rare earth/cobalt values

Details Liquid/liquid extraction of rare earth/cobalt values Liquid/liquid extraction of rare earth/cobalt values

1989-02-21

1990-10-23

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

423 215, B01D 1104

Patent

active

049649973

ABSTRACT:
Rare earth and cobalt values are separated and recovered from residue materials containing them, e.g., the waste residue from the production of samarium/cobalt magnets, by (a) dissolving such residues with nitric acid, (b) liquid/liquid extracting the resulting aqueous nitric phase with an organic phase including at least one water-insoluble neutral organophosphoric extractant, whereby the rare earth values are transferred into the organic phase, and (c) recovering the rare earth values from the organic phase.

REFERENCES:
patent: 4461748 (1984-07-01), Sabot et al.

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