METHOD OF PRODUCING CHITOSAN Russian patent published in 2015 - IPC C08B37/08 

FIELD: chemistry.

SUBSTANCE: invention relates to producing chitosan from chitin and can be used in medicine, chemical, textile, paper and food industry. The method comprises crushing chitin to particle size of 1-2×2-3 mm; deacetylation of chitin in a double-neck reactor in 40% NaOH solution with in ratio to chitin of (1-3):(20-60) at 100°C, pressure of 300 mm Hg for 1-2 hours, wherein the double-neck reactor is fitted with a reflux condenser and is connected to a vacuum water-jet pump.

EFFECT: invention improves the degree of acetylation of chitosan and preserves the natural structure of the finished product.

2 tbl, 1 dwg