Manganese and zinc solvent extraction process
US4423012A · kind A · utility
5Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Dec 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improvement in electrowinning manganese dioxide, or zinc in which the relative concentration of manganese or zinc ions to impurities is enhanced by selectively extracting manganese or zinc ions from a bleed taken from the electrowinning feed stream with an organic extractant, while rejecting impurities, stripping the loaded organics with spent electrolyte, and recycling loaded strip to the electrowinning feed. Stripped organic may be regenerated with an alkaline agent such as calcium oxide or magnesium oxide prior to recycle, and pH may be controlled during extraction by the same means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.