Invention Grant
- Patent Title: Methods for producing alkali cellulose and cellulose ether
- Patent Title (中): 生产碱纤维素和纤维素醚的方法
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Application No.: US13398369Application Date: 2012-02-16
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Publication No.: US09580516B2Publication Date: 2017-02-28
- Inventor: Mitsuo Narita
- Applicant: Mitsuo Narita
- Applicant Address: JP Tokyo
- Assignee: Shin-Etsu Chemical Co., Ltd.
- Current Assignee: Shin-Etsu Chemical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Alston & Bird LLP
- Priority: JP2011-034470 20110221
- Main IPC: C08B1/08
- IPC: C08B1/08 ; C08B11/02 ; C08B1/06 ; C08B11/00 ; C08B11/193

Abstract:
When a combination of pulps having different alkali metal hydroxide solution absorption rates is as a raw material, contact conditions such as a contact temperature and a contact time have to be changed frequently, depending on the absorption rate of pulps currently processed, thereby causing a problem of reduced productivity. For solving the problem, provided is a method for producing alkali cellulose, comprising at least the steps of: bringing two or more types of pulps having different alkali metal hydroxide solution absorption rates into contact with an alkali metal hydroxide solution to obtain a contact product; and draining the contact product, wherein the highest absorption rate is not more than 4.0 times as fast as the lowest absorption rate.
Public/Granted literature
- US20120214984A1 METHODS FOR PRODUCING ALKALI CELLULOSE AND CELLULOSE ETHER Public/Granted day:2012-08-23
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