Recovery of copper from arsenical drosses by ammonium arsenate leach
US4369164A · kind A · utility
2Cited by
1References
11Claims
0Family size
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Key dates
| Filing date | Dec 4, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Dec 4, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for leaching copper and arsenic from copper dross containing copper arsenide and separated from molten lead bullion comprises leaching the dross with an aqueous ammoniacal solution containing arsenate as the predominant anion under oxidizing conditions to obtain a leachate, removing copper from the leachate to obtain a raffinate and re-cycling raffinate to the leaching stage, and removing a bleed of raffinate from the circuit and precipitating a substantially insoluble arsenic compound from the raffinate bleed to remove arsenic from the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.