Extraction and separation of metals from solids using liquid cation exchangers
US4200504A · kind A · utility
1Cited by
5References
13Claims
0Family size
Inventor
Key dates
| Filing date | Feb 14, 1977 |
| Grant date | Apr 29, 1980 |
| Priority date | — |
| Expiry date | Feb 14, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for extraction and separation of metals utilizing the advantages of liquid-liquid extraction with cation exchangers without requiring the equivalent addition of alkali. The process is based on a combination of leaching the metal-containing raw materials with an organic acid (cation exchanger) and a subsequent use of the formed metal cationic complex in a liquid-liquid extraction process. In the said extraction process, the organic solution of metal complexes is used to recover and separate metal ions from an aqueous solution of metal salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.