Process of stripping gold and silver from carbon

Details Process of stripping gold and silver from carbon Process of stripping gold and silver from carbon

1990-09-26

1991-12-17

Andrews, Melvyn J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423DIG14, C22B 342

Patent

active

050733540

ABSTRACT:
Gold and silver are stripped from activated carbon on which they are adsorbed as cyanide complexes by subjecting the activated carbon to a stripping solution comprising as the strippant an effective amount of a compound containing the carboxylate functionality. The compound is preferably selected from benzoic and substituted benzoic acids, and polyacrylic acids of less than about 100,000 m.w.

REFERENCES:
patent: 4433151 (1984-02-01), Hiratani
patent: 4500396 (1985-02-01), Agostino et al.

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