Compositions – Absorptive – or bindive – and chemically yieldive
Patent
1988-10-21
1991-02-12
Stoll, Robert L.
Compositions
Absorptive, or bindive, and chemically yieldive
75723, 556 36, 423 24, C01B 3116, C09K 300
Patent
active
049922009
ABSTRACT:
Recovery of precious metals such as gold and silver from aqueous cyanide solutions thereof, by contact with a reagent containing a guanidine functionality. The guanidine reagent extracts the precious metal from the aqueous solution which is subsequentily stripped from the guanidine reagent and recovered by conventional methods. Certain novel guanidine compounds suitable for extracting gold and silver are disclosed.
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Lin Wilson L.
Mattison Phillip L.
Virnig Michael J.
Harris Cynthia
Henkel Corporation
Jaeschke Wayne C.
Span Patrick J.
Stoll Robert L.
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