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发明公开
CN103848729A 一种由甲醇和甲醛制备聚甲氧基甲缩醛的方法 有权

一种由甲醇和甲醛制备聚甲氧基甲缩醛的方法
摘要：
本发明涉及一种由甲醇和甲醛制备聚甲氧基甲缩醛的方法，其主要步骤是：在0.1MPa～6.0MPa，反应的空速为0.1h-1～5000h-1及催化剂存在条件下，由甲醇与甲醛于40℃～150℃反应，得到目标物（CH3O(CH2O)xCH3，3≤X≤8）；其特征在于，其中所述催化剂是：由苯乙烯型酸性阳离子交换树脂负载对甲苯磺酸得到的负载型催化剂。本发明以苯乙烯型酸性阳离子交换树脂负载对甲苯磺酸得到的负载型催化剂替换现有制备CH3O(CH2O)xCH3（3≤X≤8）方法中所用的苯乙烯型酸性阳离子交换树脂（催化剂），提高该制备反应的选择性。
摘要（英）：

The invention relates to a method for preparing polyoxymethylenedimethylether by using methanol and formaldehyde. The method mainly comprises the following step: reacting methanol with formaldehyde under the condition that the pressure is 0.1-6.0MPa and the reaction air speed is 0.1-5,000 h<-1> in the presence of a catalyst to obtain a target object CH3O(CH2O)xCH3, wherein X is more than or equal to 3 and less than or equal to 8. The method is characterized in that the catalyst is a supported catalyst obtained by loading p-toluenesulfonic acid onto styrene type acid cation exchange resin. By replacing styrene type acid cation exchange resin (catalyst) used in the conventional method for preparing CH3O(CH2O)xCH3 (X is more than or equal to 3 and less than or equal to 8) with the supported catalyst obtained by loading p-toluenesulfonic acid onto styrene type acid cation exchange resin, the selectivity of preparation reactions is enhanced.

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