FIELD: chemical industry. SUBSTANCE: method comprises activation of cellulose vegetable stock by stirring with aqueous alkali solution in the presence of hydrogen peroxide, esterification with chlorosubstituted alkylcarboxylic acid and drying. Stock includes unpurified lint and flax waste and this makes it possible to reduce cost. EFFECT: more efficient preparation method. 3 cl, 15 ex, 2 tbl
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