アルカリセルロースの製造方法

Japanese Patent JP5887196

B2

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 is pulverized in the presence of 0.6 to 1.5 mol of a basic compound relative to 1 mol of an anhydroglucose unit that constitutes a cellulose in the said cellulose-containing raw material and under the condition in which the water content therein relative to the cellulose in the cellulose-containing raw material is 10% or less by mass thereby obtaining a cellulose powder mixture having the median diameter of the cellulose-containing raw material made 150 µm or less and Step 2 wherein water content therein is adjusted in the range of 30 to 100% by mass relative to the cellulose by adding water to the cellulose powder mixture thereby obtaining the alkali cellulose in the powder form; and (B) a method for producing a cellulose ether by reacting the alkali cellulose produced by the foregoing production method with an etherification agent.

Eisuke Miyoshi
Minoru Yoshida
Miyazato Ryo
Kenichi Shiba
Takahashi base
Youichiro Imori

JP2012103660A

March 16, 2016

April 27, 2012

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Kao Corporation

C08B1/08; C08B11/00; C08B11/08; C08B11/12; C08B11/145

JP201137924A
JP42800B2
JP384800B1
JP4643103B1
JP151735C2
JP2009173869A
JP2009143997A
JP2009114375A
JP2009102587A
JP2010106197A

Tamotsu Otani
Makoto Kataoka

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