Method for recovering cyanide from a barren solution

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United States of America Patent

PATENT NO 9890052
APP PUB NO 20170081202A1
SERIAL NO

15268731

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Abstract

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A process is disclosed for recovering cyanide used to leach gold or silver from ore. In the course of leaching gold or silver from ore, a barren solution is generated. A portion of the barren solution containing sodium cyanide is recycled to the cyanidation process while blowdown from the barren solution is subjected to pre-treatment, UV photodissociation and pH adjustment. Ultimately, a volatile hydrocyanic acid is formed and is absorbed into a sodium hydroxide solution through the employment of a gas-filled membrane. This forms sodium cyanide that can be recycled and used in the cyanidation process to leach gold or silver from ore.

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Patent Owner(s)

Patent OwnerAddress
VEOLIA WATER SOLUTIONS & TECHNOLOGY SUPPORTIMMEUBLE L'AQUARENE 1 PLACE MONTGOLFIER SAINT-MAURICE 94417

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Banerjee, Kashi Moon Township, US 17 175
Buisson, Herve Apex, US 7 64

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