Method for separating metal contaminants from organic polymers

Details Method for separating metal contaminants from organic polymers Method for separating metal contaminants from organic polymers

1987-10-29

1991-02-12

Teskin, Fred

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

Synthetic resins

Treating polymer containing material or treating a solid...

528483, 528487, 528490, 528491, C08F 608, C08F 624

Patent

active

049925296

ABSTRACT:
A method for separating metal residues from a polymer wherein a solution or suspension of said polymer is contacted with an aqueous solution containing one or more inorganic acids in the presence of a monocarboxylic acid containing from about 6 to about 20 carbon atoms. The polymer solution or suspension will be contacted with an oxidizing agent either prior to or simultaneously with the contacting with the aqueous inorganic acid solution. The inorganic acid is, preferably, a mineral acid and the monocarboxylic acid is preferably a branched chain alkanoic acid having from about 6 to about 10 carbon atoms. When a monocarboxylic acid is used in combination with the inorganic acid, the amount of metal removed from the polymer is increased and the amount of the aqueous phase containing ionized metal entrained in the organic phase is sugnificantly reduced.

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