Electrochemical process for recovering precious metals from thei

Details Electrochemical process for recovering precious metals from thei Electrochemical process for recovering precious metals from thei

1976-08-16

1978-12-05

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25C 120

Patent

active

041284623

ABSTRACT:
An electrochemical process of the type for recovering precious metals such as gold and silver from their ores by adding to a slurry of the ore a cyanide complexing agent such as sodium cyanide and by electrolytically recovering the precious metal. The process is characterized by the use of small quantities, e.g., 50 milligrams per liter, of a water soluble electroconductive cationic resin, preferably polyvinylbenzyltri-methylammoniumchloride sold under the name ECR-34 by Dow Chemical Company of Midland, Michigan as an aqueous solution containing 33.7% of solids. The use of such a resin increases the amount of precious metals recovered from the ore per unit of time, improves the degree of recoverability, and improves the quality of the recovered metal.

REFERENCES:
patent: 2384300 (1945-09-01), Harford
patent: 2729557 (1956-01-01), Booth et al.

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