METHOD FOR PREPARING CELLULOSE ETHER HAVING LOW DEGREE OF POLYMERIZATION AND CELLULOSE ETHER PREPARED THEREBY

摘要

The present invention provides: a method for producing a low degree cellulose ether which has a less yellowing; and the cellulose ether which is produced by the same. Specifically, the provided method for producing the low degree cellulose ether includes, at least,: a process of obtaining an alkali cellulose by putting or mixing a pulp with alkali hydroxide solution; a first depolymerization process of making the viscosity reduction rate of the alkali cellulose be 10-95% by making oxygen react to the alkali cellulose; a process of making an etherification agent react to the depolymerized alkali cellulose; a process of obtaining a cellulose ether by drying after washing a reactant with the etherification agent; and a second deploymerization process of making the viscosity reduction rate of the cellulose ether be 40-99.9% by making a hydrochloric acid become in contact with the cellulose ether.