C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/04 (2006.01) C22B 3/16 (2006.01)
Patent
CA 2047711
A process for the hydrometallurgical recovery of gold from gold-bearing material comprising the step of treating gold- bearing material with an acidic lixiviant solution containing thiourea and ferric ions, characterized in that the said solution also includes a complexing agent for ferric ions, whereby consumption of thiourea is significantly reduced The complexing agent may be selected from the group consisting of di- and tri-carboxylic acids, phosphoric acid and phosphate salts, thiocyanates, fluorides, fluosilicic acid and fluosilicate salts, EDTA and EDTA salts, and mixtures thereof
Cra Services Limited
Kirby Eades Gale Baker
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