发明申请
US20090165971A1 METHODS FOR PREPARING ALKALI CELLULOSE AND WATER-SOLUBLE CELLULOSE ETHER
有权
制备碱性纤维素和水溶性纤维素醚的方法
- 专利标题: METHODS FOR PREPARING ALKALI CELLULOSE AND WATER-SOLUBLE CELLULOSE ETHER
- 专利标题(中): 制备碱性纤维素和水溶性纤维素醚的方法
-
申请号: US12330611申请日: 2008-12-09
-
公开(公告)号: US20090165971A1公开(公告)日: 2009-07-02
- 发明人: Mitsuo Narita
- 申请人: Mitsuo Narita
- 专利权人: Shin-Etzu Chemical Co., Ltd.
- 当前专利权人: Shin-Etzu Chemical Co., Ltd.
- 优先权: JP2007-337085 20071227
- 主分类号: D21C3/02
- IPC分类号: D21C3/02
摘要:
Provided is a method for preparing cellulose ether which is transparent as dissolved in water and has low water-insoluble content. More specifically, provided are a method for preparing alkali cellulose comprising 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; and a method for preparing water-soluble cellulose ether comprising a step of reacting the alkali cellulose with an etherifying agent.