Processes for separating metals

Details Processes for separating metals Processes for separating metals

1970-12-04

1976-02-10

Sebastian, Leland A.

Compositions

Organic luminescent material containing compositions

Scintillating or lasing compositions

252317, 260270R, 2604291, 260439R, 260429J, 2604381, 264 05, 423 8, 423 15, 423 32, 423 81, 423139, 423144, 423157, B01J 1300, C09K 300

Patent

active

039376672

ABSTRACT:
In conventional processes for separating metals by selective precipitation, the precipitate is frequently in an amorphous form, eg a slime, which is difficult to filter, wash and handle generally. In the present process mixed solutions and/or sols of the metals are mixed with a suitable soluble organic polymer to form a viscous mixture. The latter is formed into discrete entities, e.g. drops, which are contacted with a reagent which converts each drop to a gelled entity containing at least one of the metals as a precipitate.
In one form of the process, the same chemical reagent also serves to dissolve the other metal present in the initial drops. The metals are then easily separated by separating the gelled drops from the reagent. In another form, the reagent includes two different chemical reagents which contact the drop simultaneously, one to precipitate one metal in the gelled drops and the other to dissolve the other metal. In a variant of the latter form, the two reagents contact the drops consecutively, the first precipitating both metals in the gelled drops, and the second dissolving one metal out of the gelled drops.

REFERENCES:
patent: 2727806 (1955-12-01), Forward et al.
patent: 2860949 (1958-11-01), Beaufait, Jr. et al.
patent: 2879137 (1959-03-01), Bare et al.
patent: 3495954 (1970-02-01), Grimes et al.

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