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Bifunctional anion-exchange resins with improved selectivity and exchange kinetics
Bifunctional anion-exchange resins with improved selectivity and exchange kinetics
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机译:具有改进的选择性和交换动力学的双功能阴离子交换树脂
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摘要
Disclosed herein are a class of anion exchange resins containing two different exchange sites with improved selectivity and sorptive capability for chemical species in solution, such as heptavalent technetium (as pertechnetate anion, TcO4-). The resins are prepared by first reacting haloalkylated crosslinked copolymer beads with a large tertiary amine in a solvent in which the resin beads can swell, followed by reaction with a second, smaller, tertiary amine to more fully complete the functionalization of the resin. The resins have enhanced selectivity, capacity, and exchange kinetics.
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