| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing cellulose ether which is transparent as dissolved in water and has a lower water-insoluble content. SOLUTION: The method for producing alkali cellulose comprises a contact process of bringing a pulp sheet having sheet density of 0.60 g/ml or less or a sheet shape pine, or chips into which the pulp sheet has been formed, into contact with an alkali metal hydroxide solution at 5-70°C for 10-600 seconds to obtain an alkali cellulose reaction mixture; and a drain process of draining the reaction mixture, wherein the amount of alkali metal hydroxide solution to be used for the contact process is selected so that the alkali cellulose obtained by the drain process has a ratio of the mass of alkali metal hydroxide component determined by neutralization titration of the alkali cellulose to the mass of solid component in the pulp: [(alkali metal hydroxide component)/(solid component in the pulp)] of 0.3 to 1.5. COPYRIGHT: (C)2009,JPO&INPIT |
