FIELD: textile, paper.
SUBSTANCE: method includes chopped straw impregnation in a reactor and maceration with aqueous solutions of sodium hydroxide with concentration of 20-30 g/l in a unit of Na2O at the temperature of 30-80°C. The method is carried out at the ratio of the solution weight to the dry chopped straw equal to 7:1. The impregnated chopped straw is maintained at the specified temperature for 30 min. The leaking liquid phase is extracted. Heated water is added to the mass, the mass temperature is increased up to 96°C, and boiling is executed at this temperature for 2 hours and 30 min.
EFFECT: higher yield of cellulose, reduced duration of process, its simplification and reduction of power inputs.
1 dwg, 1 tbl
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