本发明的一个目的是提供一种工业上有利的制备基本上不使用溶剂且在反应完成后不需要造粒的双亚氨基二羧酸的方法。 该目的通过由三羧酸酐和二胺制备双亚氨基二羧酸的方法来实现，该方法包括以下步骤（i）和（ii）：步骤（i）：在三羧酸酐或二胺中， 高熔点组分在不高于高熔点组分的熔点和不高于低熔点组分的熔点的温度下加热，使得高熔点组分处于固态 将低熔点组分加入到高熔点组分中以获得混合物; 步骤（ii）：加热步骤（i）中获得的混合物以保持其固态以获得双亚氨基二羧酸的步骤。

The present invention, without substantially utilizing a solvent, no-hwahal standing after the completion of the reaction, and an object thereof is to provide a method for producing beneficial yimido bis-dicarboxylic acid on a commercial scale. The object is, to the step (i), the dicarboxylic acid bis yimido from, tricarboxylic acid anhydride and diamine containing (ii) is achieved by a process for producing:
Process (i): tricarboxylic acid anhydride or diamine of melting point component and a high melting point component having a melting point when the lower component with the low melting point component and a high melting point component of high than the melting point of the melting point component melting point or higher of the low melting point component heating, high-melting point component to maintain the solid state, and by the addition of the low-melting component to the melting point component, the step of obtaining a mixture in; And
Process (ii): The mixture obtained in the step (i), is heated to maintain the solid phase, a step for obtaining a yimido bis-dicarboxylic acid.