Grafted methylenediphosphonate ion exchange resins
US5712347A · kind A · utility
4Cited by
0References
11Claims
0Family size
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Key dates
| Filing date | Apr 3, 1997 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Apr 3, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and R.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange-resin are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.