METHOD FOR PREPARING HYDROXYETHYL CELLULOSE

• Main Authors: LIU, Tao, TENG, Bo, ZHANG, Yan, LI, Changyin, LI, Qinghua, TENG, Kun
• Format: Patent
• Language: Chinese; English; French
• Published: 03.12.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP

Disclosed is a method for preparing hydroxyethyl cellulose. The method for preparing hydroxyethyl cellulose comprises a process of subjecting a cellulose raw material to alkalization, etherification, pH adjustment, washing and desalination, and solid-liquid separation to obtain hydroxyethyl cellulose, and also comprises the step of adding a precipitant before washing and desalination, and/or also comprises the step of adding a crosslinker between pH adjustment and washing and desalination. The method for preparing hydroxyethyl cellulose inhibits the dissolution and/or delays the dissolution of hydroxyethyl cellulose in water, achieves washing and desalination, and ensures the quality of the product; in comparison with conventional production processes, the washing liquid does not use organic solvents, there is no washing solvent recovery process step, production costs are significantly reduced, and the safety hazards and occupational health risks caused by the use of organic solvents are reduced; furthermore,