Non-polluting process for recovery of precious metal values from ores including those containing carbonate materials
US4342592A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Aug 1, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A non-polluting chemical process for recovery of metals from metal containing ores or other solid materials by: PA0 (1) Treating the ore with a large volume of an aqueous solution containing chloride and hypochlorite ions (lixiviant solution); PA0 (2) Recovering the solubilized metal values from the lixiviant solution by cementation; PA0 (3) Regenerating the hypochlorite ion by electrochemical means; and PA0 (4) Recycling the lixiviant solution. In certain instances, steps (3) and (4) may be omitted with hypochlorite ion being provided as makeup to the circuit from external sources. The process of this invention has been shown to be effective for use with ores containing carbonate and cyanicidic minerals, including calcite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.