Process of leaching gold
US9045811B2 · kind B2 · utility
1Cited by
2References
8Claims
0Family size
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Key dates
| Filing date | May 29, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jul 1, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process of leaching gold can be inexpensively and efficiently carried out from a mixture containing sulfur and gold, typically from the material containing sulfur and gold that is an intermediate product recovered by the flotation method in the hydrometallurgical method. Specifically, the mixture containing elemental sulfur and gold and an aqueous solution of hydroxide of one or more of metals of alkali metals and alkaline earth metals are combined, the hydroxides reacting with elemental sulfur to form thiosulfate of alkali and/or alkaline earth metal, and the gold thereby being leached by reaction with the thiosulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.