发明名称 |
Förfarande för framställning av metylcellulosaetrar |
摘要 |
A water-soluble methyl cellulose ether, having a flocculation point below 100° C., is manufactured by reacting methyl chloride and a cellulose activated by mercerizing the cellulose with aqueous alkali in the presence of a C2-C3 alkyl chloride as a reaction medium at a temperature from 65° C. to 90° C. and at a pressure from 3 to 15 bar. The weight ratio between the cellulose and the C2-C3 alkyl chloride is normally from 1:1 to 1:5. The use of the reaction medium makes it possible to produce at a low pressure methyl cellulose ether at a good rate. |
申请公布号 |
SE520715(C2) |
申请公布日期 |
2003.08.12 |
申请号 |
SE20010004047 |
申请日期 |
2001.12.03 |
申请人 |
AKZO NOBEL NV |
发明人 |
LARS BERGLUND;KARL-AXEL JOHANSSON;KENNETH SUNDBERG |
分类号 |
C08B11/02;C08B11/193;(IPC1-7):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 |
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地址 |
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