Chloride assisted hydrometallurgical extraction of metal

Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing single metal

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205583, 205584, 205604, 205606, 205607, 205609, 423 24, 423 27, 423 99, 423109, 209165, 23293S, C22B1/00

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059024747

ABSTRACT:
A process for the extraction of precious metals from a copper sulphide ore or concentrate, by treating a leach residue of the ore or concentrate, includes the steps of removing elemental sulphur from the leach residue to obtain a low sulphur residue and subjecting the low sulphur residue to an oxidative leach at elevated temperature and pressure to oxidize sulphur and precious metal compounds present in the low sulphur residue to produce a residue for the extraction of the precious metals therefrom.

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Flett, D.S., "Solvent Extraction in Copper Hydrometallurgy: a Review", Mineral Processing & Extractive Metallurgy, Mar. 1974, pp. C30-C37.

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