Hydrometallurgical extraction and recovery of copper, gold, and silver via cyanidation and electrowinning
US5667557A · kind A · utility
2Cited by
2References
11Claims
0Family size
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Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hydrometallurgical process for treating copper feed materials containing gold and/or silver by simultaneously leaching copper, gold and/or silver into an aqueous cyanide solution, recovering copper in metallic form by electrowinning and regenerating cyanide ions is provided, wherein high current efficiencies are achieved at high current densities and at low copper concentrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.