Patent ID: 8500847
Filing Date: 2013-08-06
Classification: C22B,Y02P

Abstract:
1. A method of recovering gold from ore containing gold, the method comprising the steps of: treating the ore with a thiosulfate leach agent to obtain a leach solution containing gold; pretreating activated carbon with copper cyanide to present copper cyanide on a surface of the activated carbon; loading the pretreated activated carbon with the leach solution containing gold to adsorb gold onto the pretreated activated carbon, wherein a ratio of copper cyanide on the surface of the pretreated activated carbon to gold in the leach solution is at least about 1.5; stripping the adsorbed gold from the pretreated activated carbon with a cyanide solution, wherein a ratio of copper and gold on the surface of the pretreated activated carbon is less than about 1.5; and isolating the gold.