FIELD: chemistry.
SUBSTANCE: method involves reacting arabinogalactan with a sulphating complex while continuously stirring and heating. The sulphating complex used is a sulphamic acid-urea complex. Said complex is obtained by mixing equimolar amounts of sulphamic acid and urea in dioxane. Sulphation of arabinogalactan is carried out at temperature of 80-95°C and hydromodulus of 1:10 for 2.5-3.5 hours. The ratio of arabinogalactan to the sulphating complex is 1:13-25 (g:mmol). The product is separated by neutralisation and precipitation in ethyl alcohol.
EFFECT: invention widens the range of sulphating reagents for arabinogalactan, simplifies the method and increases cost-effectiveness of the method.
6 ex, 1 tbl
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