| 摘要 |
PURPOSE:To provide the method for simply producing the highly pure maleimide reduced in the content of ring-unclosed maleamic acid, facilitating the removal of an acid catalyst, etc., and not exhausting a halogen when a waste solvent is burnt. CONSTITUTION:The method for producing the maleimide is characterized by reacting an amine compound with maleic anhydride in the solvent mixture of an ester solvent with an aprotic polar solvent and subsequently subjecting the resultant maleamic acid to a dehydrative ring-closing reaction in the presence of an acid catalyst. |
