Polyvinylpyridinium anion-exchangers for recovery of technetium and plutonium anions
US5604264A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Apr 3, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Described are anion-exchange materials having extraordinarily high affinity for plutonium anions such as plutonium (IV), and technetium anions such as pertechnetate. Preferred inventive resins are highly divinylbenzene cross-linked polyvinylpyridine resins exhibiting a macroreticular bead form, which have been quaternized to contain a substantial amount of 1-alkyl-pyridinium groups wherein the alkyl group has 4 to 8 carbon atoms. The inventive resins can be used in preferred processes for recovering plutonium and/or technetium anions from aqueous mediums, for example nuclear waste streams or groundwater related to civilian or defense-related nuclear operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.