Polymer modification of Resorcinol-Formaldehyde (R-F) ion-exchange resin
- Pacific Northwest National Lab., Richland, WA (United States)
- Univ. of Idaho, Moscow, ID (United States)
Resorcinol-Formaldehyde (R-F) resin is a candidate regenerable ion-exchange resin for removal of radioactive cesium from highly alkaline waste tank supernates at both the Hanford and Savannah River sites. Previous investigations into the structure/function relationships of R-F resin have shown that the R-F resin undergoes facile oxidation to produce para-quinones, with loss of ion-exchange sites, hence lowered performance of the resin for cesium ion-exchange. In this report, we give the results of our studies into polymer resins prepared using 4-methylresorcinol and 4-fluororesorcinol. The reaction of 4-methylresorcinol with formaldehyde formed oligomeric structures, while a mixture of 4-fluororesorcinol, phenol, and formaldehyde produced a non-soluble resin in aqueous/alkaline conditions. The 4-fluororesorcinol resin underwent significant nucleophilic displacement of the fluorine substituent to give oxidized resins with lower ion-exchange performance.
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 560095
- Report Number(s):
- CONF-970443--
- Country of Publication:
- United States
- Language:
- English
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