FIELD: production of cellulose derivatives, particularly, methods of production of microcrystalline cellulose used in chemical, perfume, pharmaceutical, food industries and medicine. SUBSTANCE: method includes preliminary grinding of oat straw; treatment of ground oat straw with solution of sulfuric and peroxomonosylfuric acids at preset concentrations, atmospheric pressure and temperature of mixture boiling at 100-105 C for 0.5-2.0 h. Mechanical grinding is carried out in vibratory mill for 9 min. EFFECT: production of microcrystalline cellulose from low cost and nontraditional raw material in the form of cultivated oat straw (Avena satival L). 3 ex
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