Gold Dissolution in Chloride Solutions.
Metall Soc AIME Warrendale, Pennsylvania, 1986 :259-271
The Bureau of Mines investigated the dissolution of gold in chloride solutions by cyclic voltammetry. Voltammograms of gold were obtained and provided a means of determining the effects of chloride concentration and different ionic species on the redox potentials and reaction rates for dissolving gold in cacl2 solutions. The potentials for gold dissolution ranged for 1.102 to 0.880 V standard hydrogen electrode in 0.01 to 8.0N cacl2 solutions, respectively. The dissolution rate was increased by increasing the chloride concentration and was further enhanced in chloride solutions containing hydrochloric acid, cupric, ferric, or cobaltic chlorides. The cyclic voltammetry data correlated to the results in the actual leaching of gold from a complex sulfide concentrate and a hydrometallurgical process residue in a chloride system.
Metall. Soc. AIME, Warrendale, Pennsylvania, 1986, PP. 259-271