Use Annual Plants as an Additional Raw Materials for Obtaining Technical Cellulose
CENTRAL ASIAN JOURNAL OF MEDICAL AND NATURAL SCIENCES, (2022)Abstract
The content of cellulose in annual plants of cereals is comparable to its amount in wood raw materials (34–51% by weight). Existing technologies for producing cellulose from annual plants are based mainly on alkaline cooking methods. The resulting unbleached straw pulp is of low quality. It is used for the production of cardboard, and in composition with wood pulp — for the production of some types of unbleached paper. When obtaining cellulose semi-finished products and cellulose from straw, the methods of alkaline delignification by the thermo-mechanical-chemical method for high yield cellulose can also be used 1. Currently, cellulose is produced mainly based on cotton linters. Its 70 - 80% share is exported abroad. The high cost of cellulose obtained from cotton linters is the reason for the increase in the cost of products based on it, and the decrease in stocks of cellulose from year to year does not ensure the full operation of enterprises, where it is considered the main raw material, or in some cases leads to the liquidation of these enterprises.