Selective extraction of metal ions with polymeric extractants by ion exchange/redox
US4664700A · kind A · utility
5Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Jun 13, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The specification discloses a method for the extraction of metal ions having a reduction potential of above about +0.3 from an aqueous solution. The method includes contacting the aqueous solution with a polymeric extractant having primary phosphinic acid groups, secondary phosphine oxide groups, or both phosphinic acid and phosphine oxide groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.