FIELD: polymers, chemical and biochemical technology.
SUBSTANCE: method for preparing oligomers of chitosan is carried out by enzymatic hydrolysis of chitosan in an aqueous solution at pH 3.0-4.4. Hydrolysis is carried out in the presence of chitosanase and papain taken in the ratio = 1:(1-1.2) by mass. Hydrolyzate is treated with anion-exchange resin, filtered, concentrated to the content of water 62-80% and dried. Method provides decreasing losses by 50-70% and enhancing quality of the end product. Invention can be used in food industry and medicine.
EFFECT: improved preparing method.
2 cl, 4 ex
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