申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0823427A1
公开(公告)日:1998-02-11
In a process for reacting N,N'-dialkylethylenediamine with urea in an aprotic polar solvent to prepare 1,3-dialkyl-2-imidazolidinone, a process comprising progressing the reaction while continuously adding N,N'-dialkylethylenediamine and urea into the aprotic polar solvent, is disclosed.
The process is a high-yield manufacturing process in industry capable of efficiently producing very high purity 1,3-dialkyl-2-imidazolidinone which contains less than 0.1% by weight of by-product 1,3-dialkyl-2-imidazolidinimine derived from the raw materials.
本发明公开了一种在非烷基极性溶剂中使 N,N'-二烷基乙二胺与脲反应制备 1,3-二烷基-2-咪唑烷酮的工艺,该工艺包括在向非烷基极性溶剂中连续加入 N,N'-二烷基乙二胺和脲的同时推进反应。
该工艺是一种高产的工业制造工艺,能够高效地生产出纯度极高的 1,3-二烷基-2-咪唑烷酮,其原料中副产物 1,3-二烷基-2-咪唑烷亚胺的含量小于 0.1%(按重量计)。