Process for the recovery of noble metals from ores; which process uses thiourea
US4561947A · kind A · utility
23Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Feb 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a process for the hydrometallurgical recovery of noble metals from materials containing them by treatment with thiourea in an aqueous, acidic medium in the presence of an oxidation agent, wherein the aqueous medium simultaneously contains an oxidation agent and a reduction agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.