Composition and method for selectively removing metal ions from an aqueous solution
US6139752A · kind A · utility
1Cited by
5References
20Claims
0Family size
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Key dates
| Filing date | Apr 17, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Apr 17, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composition of matter is provided in which a phosphonic acid or phosphonic acid ester group is linked through a thioether residue to a silicon atom which is further covalently bonded to a solid inorganic support. The compositions can be employed to selectively separate metal ions having high cationic charge from a solution containing lower-charged cations, and also to selectively separate highly charged cations having a relatively high charge density from cations having the same charge, but a lower charge density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.