THE METHOD OF ISOLATION AND PURIFICATION OF (MONO- AND DI-SUBSTITUTED) CHITIN ESTERS AND CHITIN COPOLYESTERS FROM REACTION MIXTURES

摘要

The invention consists in the method of isolation and purification of mono- and/or di- substituted esters and copolyesters of chitin from reaction mixtures. The method is based on adding to the reaction mixture containing the products of chitin acylation performed using the acid anhydrides in the presence of respective catalysts with aqueous solution of acidic sodium carbonate and subsequent grinding of the reaction mixture in order to obtain a homogeneous precipitate, which is then washed by solvent, dried and dissolved in solvent, precipitated in water and finally washed again by water.