COMPLEXES OF PECTIN BIOPOLYMER WITH DICARBOXYLIC ACIDS AND METHOD FOR THEIR PREPARING Russian patent published in 2006 - IPC C08B37/06 

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