Title:
METHODS FOR PREPARING ALKALI CELLULOSE AND WATER-SOLUBLE CELLULOSE ETHER
Document Type and Number:
Japanese Patent JP2009155534
Kind Code:
A
Abstract:
To provide a method for preparing cellulose ether which is transparent and has low water-insoluble content.
A method for preparing alkali cellulose comprises a contact step of bringing a pulp sheet having a pore volume of 1.0 ml/g or greater, or chips into which the pulp sheet has been converted, into contact with an alkali metal hydroxide solution to obtain an alkali cellulose reaction mixture, and a drain step of draining the alkali cellulose reaction mixture. The method for preparing water-soluble cellulose ether comprises a step of reacting the alkali cellulose with an etherifying agent.
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Inventors:
NARITA MITSUO
Application Number:
JP2007337085A
Publication Date:
July 16, 2009
Filing Date:
December 27, 2007
Export Citation:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
C08B1/08; C08B11/02
Domestic Patent References:
| JP111867C | ||||
| JP124928C | ||||
| JPH02225501A | 1990-09-07 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Masayuki Okamoto
Fukagawa Eri
Satoshi Morimoto
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Masayuki Okamoto
Fukagawa Eri
Satoshi Morimoto