Process for the separation of precious group VIII a metals from

Details Process for the separation of precious group VIII a metals from Process for the separation of precious group VIII a metals from

1990-12-11

1992-07-21

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75722, 423 22, 423DIG14, C22B 324

Patent

active

051319438

ABSTRACT:
A mixture of cyanide complexes with certain Group VIII metals and other metals is passed in contact with solid subdivided cross-linked polyvinylpyrrolidone whereby the Group VIII metals--platinum, palladium, rhodium and iridium--are preferentially retained on the cross-linked polyvinylpyrrolidone. The retained metals are recovered by ashing or chemical treatment of the cross-linked polyvinylpyrrolidone.

REFERENCES:
patent: Re30066 (1979-08-01), Oberhofer
patent: 3817745 (1974-06-01), Copes et al.
patent: 3994719 (1976-11-01), Corte
patent: 4421724 (1983-12-01), Hunnel

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