Process for recovering gold from thiosulfate leach solutions and slurries with ion exchange resin
US6344068B1 · kind B1 · utility
31Cited by
52References
67Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2000 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Apr 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for recovering gold from thiosulfate leach solutions and slurries in which gold is loaded into an ion exchange resin. Gold is recovered from the resin by elution with polythionate ions and the resin is regenerated with sulfide or sulfite. Gold is recovered from the eluate by precipitation with sulfide ions, cementation or electrowinning. The invention also provides for a process of manufacturing polythionate ion solutions suitable for eluting gold from ion exchange resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.