METHOD OF OBTAINING CARBOXYLIC CATIONITES Russian patent published in 2010 - IPC C08F220/44 C08F212/36 C08F220/06 C08F2/18 C08F2/20 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of obtaining weakly acidic carboxylic cationites used in sorption processes in hydrometallurgy, biotechnology and heat engineering. A method is described for obtaining carboxylic cationites through suspension copolymerisation of acrylonitrile, divinylbenzene and methacrylic acid in the presence of a blowing agent and a polymerisation initiator - benzoyl peroxide in a medium of a water-salt solution of potato starch containing 20% sodium or ammonium chloride, or in a medium of an aqueous solution of cellulose, with subsequent alkaline hydrolysis of nitrile groups of the copolymer, with 71-76.5% acrylonitrile, 8-12% divinylbenzene, 5-10% methacrylic acid content in the polymerisation mixture and using a blowing agent in form of butylacetate in amount of 15-40% of the volume of the mixture of monomers.

EFFECT: design of an efficient method of obtaining weakly acidic carboxylic cationites.

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