| 发明名称 |
PROCESS OF PREPARING AN ESTER OF A CELLULOSE ETHER |
| 摘要 |
A reaction product mixture is obtained from a reaction of (a) a cellulose ether with (b) an aliphatic monocarboxylic acid anhydride or with a di- or tricarboxylic acid anhydride or with a combination of an aliphatic mono-carboxylic acid anhydride and a di- or tri-carboxylic acid anhydride in the presence of (c) an aliphatic carboxylic acid. A process for precipitating an esterified cellulose ether from this reaction product mixture comprises the step of contacting the reaction product mixture with water and subjecting the combination of water and the reaction product mixture to a shear rate of at least 800 s−1. The precipitated esterified cellulose ether can be recovered as a non-tacky product. |
| 申请公布号 |
US2015031873(A1) |
申请公布日期 |
2015.01.29 |
| 申请号 |
US201314384220 |
申请日期 |
2013.03.12 |
| 申请人 |
Dow Global Technologies LLC |
发明人 |
Sprehe Matthias;Petermann Oliver;Appell Robert Bruce |
| 分类号 |
C08B13/00 |
主分类号 |
C08B13/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for precipitating an esterified cellulose ether from a reaction product mixture obtained from a reaction of (a) a cellulose ether with (b) an aliphatic monocarboxylic acid anhydride or a di- or tricarboxylic acid anhydride or a combination of an aliphatic monocarboxylic acid anhydride and a di- or tricarboxylic acid anhydride in the presence of (c) an aliphatic carboxylic acid, wherein the process comprises the step of contacting the reaction product mixture with water and subjecting the combination of water and the reaction product mixture to a shear rate of at least 800 s−1. |
| 地址 |
Midland MI US |
