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以苯胺和顺丁烯二酸酐为原料,维生素B1为催化剂,醋酸酐为脱水剂,在丙酮溶剂中采用两步法(醋酐法)合成N-苯基马来酰亚胺。通过对催化剂浓度、反应时间以及脱水剂醋酸酐与顺丁烯二酸酐的配比等工艺条件进行优化,实验结果表明,维生素B1有着很好的催化活性,脱水剂乙酸酐与顺丁烯二酸酐配比为1.6∶1时,催化剂浓度为1.5%(以顺丁烯二酸酐质量计)时,反应时间为4h时为最佳反应条件。在最佳反应条件下,产率可达到63.2%。对丙酮溶剂进行重复使用考察,结果证明溶剂重复使用性好。
Aniline and maleic anhydride as raw materials, vitamin B1 as a catalyst, acetic anhydride as a dehydrating agent, acetone solvent using two-step (acetic anhydride method) Synthesis of N-phenyl maleimide. Through the optimization of catalyst concentration, reaction time and the ratio of acetic anhydride to maleic anhydride, the results showed that vitamin B1 has a good catalytic activity, the dehydration agent acetic anhydride and maleic anhydride When the ratio is 1.6:1, the best reaction condition is the reaction time is 4h when the concentration of catalyst is 1.5% (mass of maleic anhydride). Under the best reaction conditions, the yield can reach 63.2%. Re-use of acetone solvent investigation, the results show that the solvent reusability.