Polyvinylpyridinium anion-exchangers for recovery of technetium

Details Polyvinylpyridinium anion-exchangers for recovery of technetium Polyvinylpyridinium anion-exchangers for recovery of technetium

1997-02-18

1997-12-02

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

521 33, 525353, 525355, C08F 802

Patent

active

056936800

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-crosslinked 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.

REFERENCES:
patent: 3086840 (1963-04-01), Hillyer
patent: 4221871 (1980-09-01), Meitzner

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