Title:
METHOD OF MANUFACTURING LOW POLYMERIZATION DEGREE CELLULOSE ETHER AND CELLULOSE ETHER MANUFACTURED BY THE SAME
Document Type and Number:
Japanese Patent JP2014148668
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing low polymerization degree cellulose ether having little yellow discoloration and to provide a cellulose ether manufactured by the same.SOLUTION: There is provided a method of manufacturing low polymerization degree cellulose ether including at least a process of obtaining alkali cellulose by contacting or mixing pulp and an alkali metal hydroxide solution, a first depolymerization process of reacting oxygen with the alkali cellulose to set a viscosity reduction rate of the alkali cellulose at 10 to 95%, a process of reacting an etherification agent with depolymerized alkali cellulose, a process of obtaining cellulose ether by drying after washing a reaction product with the etherification agent, and a second depolymerization process of contacting hydrochloric acid with the cellulose ether to set the viscosity reduction rate of the cellulose ether at 40 to 99.9%.
Inventors:
NARITA MITSUO
NISHIYAMA YUICHI
NISHIYAMA YUICHI
Application Number:
JP2014001596A
Publication Date:
August 21, 2014
Filing Date:
January 08, 2014
Export Citation:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
C08B11/00; C08B11/02; C08B11/08
Domestic Patent References:
JP2001002701A | 2001-01-09 | |||
JP2011503294A | 2011-01-27 | |||
JP2005239845A | 2005-09-08 | |||
JP2002531594A | 2002-09-24 | |||
JP2005502740A | 2005-01-27 | |||
JP2010222428A | 2010-10-07 |
Foreign References:
CN101033257A | 2007-09-12 |
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
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