METHOD OF OXIDISED DEXTRAN PRODUCING Russian patent published in 2016 - IPC C08B37/00 

FIELD: technological processes.

SUBSTANCE: invention relates to method of oxidised dextran producing. Method involves oxidation of aqueous solution of dextran with molecular weight of 20-75 kDa with potassium permanganate solution in medium of acetic acid, settling and filtering solution from impurities, separation of oxidised dextran with ethanol and drying. At that, initial dextran in form of 20-25 % acetic acid aqueous solution in concentration of 32-34 % in amount of 0.005-0.1 % of initial volume of dextran solution, potassium permanganate solution in concentration of 2 % in amount of 20-25 % of weight of dry dextran in solution, and ethanol is in concentration of 95-96 % with ethanol to liquid ratio of (1.4-1.6):1. Preferably dextran oxidation is carried out at temperature of 60-70 °C, filtering of oxidised dextran solution from impurities is carried out on membrane micro filter, and drying of oxidised dextran is carried out in vacuum oven at temperature of 60-85 °C.

EFFECT: invention enables to obtain oxidized dextran with higher output due to creation of conditions for maximum possible release of all fractions of oxidised dextran, not only medium and high-molecular but and low-molecular ones, eliminating loss of oxidised dextran and simultaneously increase organoleptic properties of oxidised dextran and its solubility in water.

4 cl, 3 ex