Method of producing sulphated arabinogalactan derivatives. RU patent 2466143.

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing arabinogalactan-based sulphated biopolymers. The method involves reaction of arabinogalactan with a sulphating SO₃-pyridine complex while continuously stirring and heating, and separating the product. The arabinogalactan first undergoes mechanochemical treatment in pyridine with ratio of the mass of arabinogalactan to the volume of pyridine equal to 1:10 for 10 minutes. Sulphation is carried out at temperature 50-55°C for 40-60 minutes. The product is separated by neutralising with aqueous solution of an alkali and then precipitated in ethyl alcohol.

EFFECT: invention increases efficiency of sulphation process, cut its duration and reduce reaction temperature.

5 ex

IPC classes for russian patent Method of producing sulphated arabinogalactan derivatives. RU patent 2466143. (RU 2466143):

C08B37 - Preparation of polysaccharides not provided for in groups ; C08B0001000000-C08B0035000000; Derivatives thereof (cellulose D21)

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