| 摘要 |
The invention provides a hydrometallurgical process for extracting noble metals from raw materials containing the same, comprising (a) leaching the raw materials with a mineral acid to leave a residue containing the noble metals, (b) treating said residue with a substantially non-aqueous liquid comprising bromine and an apolar organic solvent in which bromine dissolves, to form a complex of the formula R[MeBrx] wherein x=4-6 Me=Au, Ag, Pt, Pd Os, Ru, Rh, Ir and R is an organic moiety of the solvent, and (c) subjecting the complex-containing substantially non-aqueous liquid to electrolysis whereby noble metal is deposited on the cathode and removable therefrom and bromine liquid is formed at the anode and immediately dissolves in the organic solvent.
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