FIELD: chemistry.
SUBSTANCE: present invention relates to production of hydrolytic lignin, soluble in water, including oxidation of lignin in a solution containing acid and hydrogen peroxide, washing with water with subsequent dissolution of the oxidation product in a solution containing alkali metal hydroxide in a stoichiometric amount with respect to acid groups contained therein.
EFFECT: proposed method allows to produce aqueous solutions of hydrolyzed lignin in wide range of pH values (2-14).
8 cl, 5 ex
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