COMPLEXES OF PECTIN BIOPOLYMER WITH DICARBOXYLIC ACIDS AND METHOD FOR THEIR PREPARING

摘要

FIELD: organic chemistry, chemical technology.;SUBSTANCE: invention describes complexes of pectin biopolymer with dicarboxylic acids of the general formula (I): ;wherein R means hydrogen atom (H), methyl group (Me); m = 18-50; a) X means -(CH₂)₂ or b) X means -CH=CH, and a method for preparing complex of pectin with dicarboxylic acid of the general formula (I). Method involves interaction of pectin aqueous solution of the formula (II):; ;wherein R means hydrogen atom (H), methyl group (Me); n = 98 heated to temperature 55-60°C with dicarboxylic acid - succinic or fumaric acid at heating taken in the amount 0.13-0.55 g of acid per 1 g of pectin, and formed complex is precipitated with ethyl alcohol and dried. Prepared complexes show less toxic effect and irritating effect on stomach mucosa as compared with free succinic and fumaric acids.;EFFECT: improved preparing method, improved and valuable properties of complexes.;2 cl, 3 ex