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Title:
METHOD FOR PRODUCING WATER-SOLUBLE NONIONIC CELLULOSE ETHER EXCELLENT IN STORAGE STABILITY
Document Type and Number:
Japanese Patent JP2015028161
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a water-soluble nonionic cellulose ether excellent in storage stability.SOLUTION: There is provided a method for producing a water-soluble nonionic cellulose ether, the method comprising: a step of an etherification step of reacting an alkali cellulose with an etherifying agent to obtain a crude cellulose ether; a washing step of washing the crude cellulose ether to obtain a washed cellulose ether; a drying step of drying the washed cellulose ether; and a pulverizing step of pulverizing the cellulose ether during or after the drying. During the washing step or in a step after the washing step, a pH adjusting agent is added so that the pH of a 2 wt.% aqueous solution of the water-soluble nonionic cellulose ether, which is a finished product, is 7.0 to 10.5.

Inventors:
NARITA MITSUO
Application Number:
JP2014130305A
Publication Date:
February 12, 2015
Filing Date:
June 25, 2014
Export Citation:
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Assignee:
SHINETSU CHEMICAL CO
International Classes:
C08B11/08
Domestic Patent References:
JPS4917878A1974-02-16
JP2013057002A2013-03-28
JPS5487754A1979-07-12
JP2003155301A2003-05-27
Foreign References:
US4096326A1978-06-20
Attorney, Agent or Firm:
Okuyama In addition, it is 1.
Owner field Koichi
Tetsuo Matsushima
Hidefumi Kawamura
Ayako Nakamura
Morimoto Satoshi 2
Kyoko Tsunoda
Yu Tanaka
Koichi Tokumoto
Tokuji Watanabe



 
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