METHOD FOR PRODUCING CELLULOSE Russian patent published in 2021 - IPC D21C5/00 D21C3/04 D21C1/04 C08B37/00 

FIELD: cellulose production.

SUBSTANCE: invention relates to a method for producing cellulose from vegetable raw materials. Hogweed is used as a plant material. The method includes: grinding the hogweed; heat treatment at a temperature of 50°C with the introduction of an enzyme preparation in an amount of 0.05% relative to the wet weight for 1.5 hours; separating the pulp and adding to it a 1.4% solution of hydrochloric acid with a hydromodule of 1:6; holding at a temperature of 90°С for 3 hours; rinsing with water in a twenty-fold volume of the mass of the remainder of the hogweed pulp; processing of raw materials with 1% sodium hydroxide solution with a hydromodule of 1: 5; holding the resulting residue at a temperature of 60°С for 1.5 hours; rinsing the drug with water in a twentyfold volume; adding a 0.3% hydrochloric acid solution with a 1: 2 hydromodule to the coarse cellulose preparation; holding at a temperature of 60°С for 1 hour; separation, washing and drying of cellulose.

EFFECT: reduction of energy consumption, time of obtaining cellulose and beneficial use of harmful hogweed.

1 cl, 1 ex