Phosphonic acid based ion exchange resins
US5281631A · kind A · utility
69Cited by
15References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene disphosphonic acid with styrene, acrylonitrile and divinylbenzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.