Process for purifying silver refinery slimes
US4722831A · kind A · utility
0Cited by
8References
6Claims
0Family size
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Key dates
| Filing date | Aug 26, 1985 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Aug 26, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Gold sand resulting from the nitric acid treatment of silver refinery slimes is purified by washing with hydrochloric acid under controlled operating conditions. Platinum and other precious metals and impurities are selectively separated from the gold sand leaving a gold sand which is more efficiently refined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.