Process for Cellulose spinning Solution using 4-methymorpholine-N-oxide- Organic solvents

摘要

PURPOSE: A manufacturing method of cellulose spinning solution by using N-methyl morpholine-N-oxide(NMMO) and organic solvent is provided, which is characterized by distilling easily the organic solvent because of low specific heat and low boiling point of the organic solvent, simultaneously recovering the organic solvent, being environmental affinitive, and directly spinning the spinning solution into the organic solvent. CONSTITUTION: The cellulose spinning solution is obtained by a process containing the steps of: swelling cellulose by using the NMMO-organic solvent containing at least 25% of the organic solvent(methanol, ethanol, acetone); mixing the swollen cellulose in the NMMO-organic solvent; decompressing and vaporizing the organic solvent(methanol, ethanol, acetone) into the organic solvent having 5-20% of content, and simultaneously dissolving the cellulose completely; and then defoaming and filtering the dissolved cellulose solution. Ethanol(or methanol, acetone) is used as a coagulating bath.