| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing dialkylimidazole of high purity by effectively removing impurities and provide the dialkylimidazole obtained thereby. SOLUTION: In this production method, ammonia, primary amine, aldehyde and glyoxal are allowed to react with one another and the resultant crude dialkylimidazole is distilled to produce dialkylimidazole. In this case, the crude dialkylimidazole is treated with heat at a temperature higher than 60°C before the distillation. The heat-treated crude dialkylimidazole is separated into the aqueous layer and the oil layer, then the oil layer is distilled to obtain the dialkylimidazole of high purity. COPYRIGHT: (C)2008,JPO&INPIT
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