发明授权
- 专利标题: Methods for preparing alkali cellulose and cellulose ether
- 专利标题(中): 制备碱纤维素和纤维素醚的方法
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申请号: US11448969申请日: 2006-06-07
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公开(公告)号: US08017766B2公开(公告)日: 2011-09-13
- 发明人: Mitsuo Narita , Atsushi Hatayama , Hiroshi Umezawa
- 申请人: Mitsuo Narita , Atsushi Hatayama , Hiroshi Umezawa
- 申请人地址: JP
- 专利权人: Shin-Etsu Chemical Co., Ltd.
- 当前专利权人: Shin-Etsu Chemical Co., Ltd.
- 当前专利权人地址: JP
- 代理机构: Myers Bigel Sibley & Sajovec, PA
- 优先权: JP2005-176286 20050616
- 主分类号: C08B15/05
- IPC分类号: C08B15/05 ; C08B11/00
摘要:
Provided is a method for preparing alkali cellulose having alkali distributed uniformly therein. A uniform alkali distribution in the alkali cellulose makes it possible to prepare cellulose ether which has been substituted uniformly in an etherification reaction step. The resulting cellulose ether does not contain a floating water-insoluble portion which will otherwise appear owing to insufficient substitution. More specifically, provided are a method for preparing alkali cellulose, comprising simultaneously feeding pulp powder and an aqueous alkali solution to a high speed disperser to continuously bring them into contact with each other and a method for preparing cellulose ether, comprising reacting the resulting alkali cellulose with an etherifying agent.