METHOD OF PRODUCING PURIFIED CELLULOSE FROM LUMBER FIBRE Russian patent published in 2017 - IPC C08B1/08 D01B1/10 D01B1/14 

FIELD: chemistry.

SUBSTANCE: method includes mechanical treatment, liquid treatment to destroy associated impurities, washing with warm water, oxidizing treatment with an alkaline solution of hydrogen peroxide containing a stabilizer, the first washing with hot water, oxidizing cooking, the second washing with hot and warm water, spinning in a centrifuge, treatment for the destruction of associated impurities is carried out with hot water at a constant water temperature of 98-100°C for 30 minutes, oxidizing and cooking are carried out at a constant value of the silicate module and a constant solution temperature of 98-100°C.

EFFECT: elimination of multi-stage processing and the use of acids due to a higher content of hydrogen peroxide in solutions for oxidative processing and cooking, increasing the productivity of equipment while reducing the amount of harmful production waste products in the form of products of processing linseed fibre with a solution of mineral acid.

3 cl, 1 tbl