Precipitation of selenium from copper electrowinning solutions
US4026797A · kind A · utility
27Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Apr 19, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Selenium is removed from copper electrolytes by adding a substance selected from the group consisting of metals above copper in the electromotive series, excluding alkali metals, such as nickel powder, cobalt powder and iron powder. Sodium sulfide can also be used along with a subsequent addition of ferric sulfate. The amount of the reactive substance added should be sufficient to reduce the selenium content to below 2 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.