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US 4,303,531 AGranted
Method for adsorbing and recovering phenols
AssigneeKoei Chemical Company, Limited
InventorsNariyoshi Kawabata, Sinichi Yasuda
Life of this patent
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Abstract
The present invention relates to a: (a) material for adsorbing and recovering phenols which comprises as its main component a cross-linked polyvinylpyridine resin and (b) a method of recovering phenols using the above material.
Claims14
A process for adsorbing and recovering phenols from an aqueous solution thereof, which process comprises:
- (a) contacting said solution with a material having as its main component a tertiary-amine-type, anion-exchange resin copolymer of (i) at least one monovinyl pyridine monomer and (ii) at least one vinyl comonomer, said comonomer having a number of ethylenically unsaturated groups, and acting as a crosslinking agent, thereby causing adsorption of phenols onto said material at a high rate, and;
- (b) subsequently eluting said material with an eluting agent from which said phenols can be separated by distillation, thereby substantially recovering said phenols, and regenerating said resin.
Dependencies are inferred from the claim text.