申请人:——
公开号:US20030009035A1
公开(公告)日:2003-01-09
There is provided a process for preparing a 1,3-dialkyl-2-imidazolidinone by using an alkylene oxide as a first component, using at least one of (A) carbon dioxide and a monoalkylamine; (B) a carbon dioxide compound of the monoalkylamine; and (C) an 1,3-dialkylurea, reacting the first and second components by heating at 50 ° C. or higher to give 1,3-dialkyl-2-imidazolidinone, characterized in that the total molar amount of a molar feed amount of the monoalkylamine included in the component (A), a molar feed amount of the monoalkylamine part of the carbon dioxide compound of monoalkylamine, component (B), and the double of a molar feed amount of the 1,3-dialkylurea, component (C), is at least three folds of a molar feed amount of the alkylene oxide.
The preparation process of this invention uses an industrially readily available alkylene oxide as a starting material and can be suitably conducted with a higher yield in an industrial scale.
提供了一种制备1,3-二烷基-2-咪唑烷酮的方法,该方法使用乙烯氧化物作为第一组分,至少使用以下之一:(A)二氧化碳和一种单烷基胺;(B)单烷基胺的二氧化碳化合物;和(C)1,3-二烷基脲,通过加热至50°C或更高温度来使第一和第二组分反应,得到1,3-二烷基-2-咪唑烷酮,其特点是:单烷基胺的摩尔进料量包括在组分(A)中的单烷基胺的摩尔进料量,单烷基胺的二氧化碳化合物中的单烷基胺部分的摩尔进料量,组分(B),以及1,3-二烷基脲的摩尔进料量的两倍,组分(C),至少是乙烯氧化物的摩尔进料量的三倍。这种发明的制备过程使用工业上易得的乙烯氧化物作为起始物质,并且可以在工业规模上以更高的产率进行适当的操作。