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:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
C08B11/08
Domestic Patent References:
JPS4917878A | 1974-02-16 | |||
JP2013057002A | 2013-03-28 | |||
JPS5487754A | 1979-07-12 | |||
JP2003155301A | 2003-05-27 |
Foreign References:
US4096326A | 1978-06-20 |
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
Owner field Koichi
Tetsuo Matsushima
Hidefumi Kawamura
Ayako Nakamura
Morimoto Satoshi 2
Kyoko Tsunoda
Yu Tanaka
Koichi Tokumoto
Tokuji Watanabe