申请人:Mitsui Chemicals, Inc.
公开号:US05872260A1
公开(公告)日:1999-02-16
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'-dialkylethylnediamine and urea into the aprotic polar solvent. 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.
在一种用无水极性溶剂中将N,N'-二烷基乙二胺与尿素反应以制备1,3-二烷基-2-咪唑烷酮的过程中,该过程包括在无水极性溶剂中不断添加N,N'-二烷基乙二胺和尿素以推进反应。该过程是一种高产率的工业制造过程,能够高效生产具有极高纯度的1,3-二烷基-2-咪唑烷酮,其含有的副产物1,3-二烷基-2-咪唑烷亚胺重量不超过0.1%。