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.
本发明提供了一种制备 1,3-二烷基-
2-咪唑烷酮的工艺,该工艺以环氧亚 烷为第一组分,使用 (A)
二氧化碳和单烷基胺;(B) 单烷基胺的
二氧化碳化合物;和 (C) 1,3-二烷基
脲中的至少一种;和 (C) 1,3-二烷基
脲,通过在 50℃或更高温度下加热使第一和第二组分反应,得到 1,3-二烷基-
2-咪唑烷酮,其特征在于,组分 (A) 中包含的单烷基胺的摩尔进料总量 、单烷基胺
二氧化碳化合物的单烷基胺部分的摩尔进料量,组分(B),以及 1,3-二烷基
脲的摩尔进料量的双倍,组分(C),至少是环氧亚烷基摩尔进料量的三倍。
本发明的制备工艺使用工业上容易获得的环氧亚
烷烃作为起始原料,可以适当地在工业规模上以更高的产率进行。