FIELD: chemistry.
SUBSTANCE: method of producing octa-galact-uronide includes acid hydrolysis of pectin with subsequent separation of the liquid phase from insoluble residue of pectin and separating octa-galact-uronide. Pectin is used as low-esterified pectin with an esterification degree not exceeding 30 %. Acid hydrolysis is carried out in 0.1-2.0 mol/l solution of mineral acid at temperature 70-100 °C till concentration of octa-galact-uronide in liquid phase is not less than 0.25 mg/ml. To extract octa-galact-uronide from liquid phase, it is neutralised up to pH 4.0 minimum. Then calcium salt is added to the concentration of 0.06-0.12 mol/l. Then the sediment of octa-galact-uronide is separated from the liquid phase and dried.
EFFECT: invention enables to extract high-purity octa-galact-uronide from pectin.
2 cl, 6 ex
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