-
公开(公告)号：US20050176951A1
公开(公告)日：2005-08-11
申请号：US10497332
申请日：2002-11-26
IPC分类号： C08B11/02 , C08B11/193 , C08B11/00
CPC分类号： C08B11/193 , C08B11/02
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 mercerising 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.
摘要翻译： 絮凝点低于100℃的水溶性甲基纤维素醚是通过使甲基氯和纤维素与碱水溶液活化的纤维素在C 2 - C 3 N 3烷基氯作为反应介质，在65℃至90℃的温度和3至15巴的压力下进行。 纤维素与C 2 -C 3烷基氯化物的重量比通常为1:1至1:5。 使用反应介质可以在低压下以良好的速率生产甲基纤维素醚。
-
公开(公告)号：US07504498B2
公开(公告)日：2009-03-17
申请号：US10497332
申请日：2002-11-26
IPC分类号： C08B11/00
CPC分类号： C08B11/193 , C08B11/02
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.
摘要翻译： 絮凝点低于100℃的水溶性甲基纤维素醚是通过使甲基氯和纤维素与碱水溶液在C2-C3烷基氯作为反应介质的存在下丝光处理而活化的纤维素来制备的 温度为65℃至90℃，压力为3至15巴。 纤维素与C2-C3烷基氯的重量比通常为1:1至1:5。 使用反应介质可以在低压下以良好的速率生产甲基纤维素醚。
-
搜索结果
2 条记录 (耗时 0.021 秒)
