Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1992-04-01
1994-05-10
Langel, Wayne
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423395, 423413, 423462, 423557, C01G 302
Patent
active
053105338
ABSTRACT:
A method of producing copper compounds involves contacting metallic copper with oxygen or an oxygen-containing gas, with an aqueous solution consisting essentially of water in solution in which is a soluble ammonium salt NH.sub.4 X, where X is the anion of the salt, and with ammonia in an amount such that the solution is initially alkaline. As a result of such contact the metallic copper is initially dissolved to form a copper ammine Cu(NH.sub.3).sub.4 X and the formation of the ammine continues until the saturation concentration of the ammine is reached. Subsequently, the ammine continuously breaks down to form 3Cu(OH).sub.2.CuX.sub.2 and the water soluble products of the ammine decomposition continuously reform the amine by further reaction with the metallic copper and the oxygen on oxygen-containing gas.
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Translation of V. F. Travkin et al., "Copper Extraction from Ammoniacal Solutions," from Zhurnal Pirkladnoi Khimii, vol. 56, No. 8, pp. 1730-1734, Aug. 1983.
Australian Copper Company Pty. Ltd.
Langel Wayne
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