发明名称 |
METHOD FOR PRODUCING ALKYL CELLULOSE |
摘要 |
Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight. |
申请公布号 |
US2016168271(A1) |
申请公布日期 |
2016.06.16 |
申请号 |
US201514965149 |
申请日期 |
2015.12.10 |
申请人 |
Shin-Etsu Chemical Co., Ltd. ;SE Tylose GmbH & Co. KG |
发明人 |
Kitamura Akira;Yamamoto Atsushi;Narita Mitsuo;Nebel Heiko;Schultz Andreas |
分类号 |
C08B11/02 |
主分类号 |
C08B11/02 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing an alkyl cellulose, comprising the steps of:
mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain the alkyl cellulose, wherein a ratio of a weight of a first alkali metal hydroxide in the first alkali metal hydroxide solution to a total weight of the first alkali metal hydroxide and a second alkali metal hydroxide in the second alkali metal hydroxide solution is 50 to 86%. |
地址 |
Tokyo JP |