METHOD FOR PREPARING POWDERED CELLULOSE

摘要

The present invention relates to a new method for preparing powdered cellulose. An innovation lies in complete or partial substitution of paper grade cellulose or dissolving grade cellulose by waste lignin-cellulosed materials rising from known processes of pulp and paper production and those contained in wastepaper. While subjecting to acid hydrolysis or alkaline degradation processes in reduction of cellulose chain the requested degree of polymerization is achieved. The method of invention describes a possibility of adjustment of raw materials by alkaline mediums actuation. The powdered cellulose obtained has many industrial applications - wide scale of using in construction chemistry, petrochemical and food industry.