Title:
アルカリセルロースの製造方法
Document Type and Number:
Japanese Patent JP5887197
Kind Code:
B2
Abstract:
The present invention relates to a method for producing an alkali cellulose with suppressed decrease in the degree of polymerization as well as with small use amount of a basic compound, and to a method for producing a cellulose ether by using the alkali cellulose thus obtained. Provided by the present invention are: (A) a method for producing an alkali cellulose, comprising Step 1 wherein a cellulose-containing raw material (I) is treated by a pulverizing machine thereby obtaining a cellulose-containing raw material (II) which contains a cellulose having crystallinity in the range of 10 to 55% and Step 2 wherein the cellulose-containing raw material (II) obtained in Step 1 is added by a basic compound with the amount thereof being in the range of 0.6 to 1.5 mol relative to 1 mol of an anhydroglucose unit that constitutes the said cellulose as well as by water with the amount thereof being in the range of 20 to 100% by mass relative to the said cellulose thereby obtaining the alkali cellulose; and (B) a method for producing a cellulose ether by reacting the alkali cellulose produced by the foregoing production method with an etherification agent.
Inventors:
Eisuke Miyoshi
Minoru Yoshida
Miyazato Ryo
Youichiro Imori
Toshi Nishioka
Minoru Yoshida
Miyazato Ryo
Youichiro Imori
Toshi Nishioka
Application Number:
JP2012103663A
Publication Date:
March 16, 2016
Filing Date:
April 27, 2012
Export Citation:
Assignee:
Kao Corporation
International Classes:
C08B1/08; C08B11/02
Domestic Patent References:
| JP2009114375A | ||||
| JP2009102587A | ||||
| JP2009161717A |
Foreign References:
| WO2009063856A1 |
Attorney, Agent or Firm:
Tamotsu Otani
Makoto Kataoka
Makoto Kataoka