Gold and silver recovery processes by electrolytic generation of

Details Gold and silver recovery processes by electrolytic generation of Gold and silver recovery processes by electrolytic generation of

1988-02-16

1990-02-27

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

75102, 75118R, C25C 120

Patent

active

049043587

ABSTRACT:
The invention comprises leaching of ore or other materials containing gold and/or silver with an electrolyzed sodium bromide solution. A quantity of electric current is passed through a volume of 5% to 50% by weight sodium bromide solution to generate a quantity of active bromine. The active bromine oxidizes available gold to a solubilized or complexed form of AuBr.sub.3, or available silver to a solubilized or complexed form of AgBr. Gold or silver are separated therefrom in a manner which also generates Br.sup.- ions in solution. The Br.sup.- ion containing solution is combined with the 5% to 50% NaBr solution to make the Br.sup.- ions in such solution available for electrical regeneration into active bromine. Only in minimal, if any, amount of bromine from the 5% to 50% NaBr solution is depleted in the process.

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Fast, "John L., Glycol Stripping-a Visable Option for Recovering Gold from Carbon," E&MJ, Jun. 1987, pp. 48-49.
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