METHOD OF PREPARING CELLULOSE SOLUTIONS Russian patent published in 2002 - IPC

FIELD: paper-and-pulp industry. SUBSTANCE: invention relates to manufacture of synthetic films and fibers, in particular to processes of preparing solutions for molding hydrate- cellulose fibers preferably from wood cellulose. Ground cellulose is dissolved in mixture of 20-90 mol % N- methylmorpholine-N-oxyde monohydrate and 80-10 mol dimethylsulfoxide at 70-95 C. Then, at stirring, dimethylacetamide at dimethylsulfoxide/dimethylacetamide ratio between 20:1 and 10:1. Thus prepared solutions are stable during 6 h. EFFECT: increased dissolution rate by 2 to 15 times. 1 tbl, 10 ex