Immobilized type non-toxic catalyst and method for synthesizing N-phenylmaleimide and N-substitutional phenylmaleimide

The invention provides an immobilized type non-toxic catalyst and a method for synthesizing N-phenylmaleimide and N-substitutional phenylmaleimide. The immobilized type non-toxic catalyst is formed by utilizing a porous zeolite molecular sieve as a carrier, impregnating the porous zeolite molecular sieve into water solution of titanium organic phosphonic chelate or zirconium organic phosphonic chelate or hafnium organic phosphonic chelate for 6-10 hours, reacting and bonding, drying and roasting. Pure products of the N-phenylmaleimide and N-substitutional phenylmaleimide are obtained by adding maleic anhydride and aniline or maleic anhydride and aniline derivatives into the immobilized type non-toxic catalyst as raw materials, sequentially acylating, dehydrating and cyclizing and recrystallizing. The immobilized type non-toxic catalyst is non-toxic and environment-friendly, the method of synthesizing the N-phenylmaleimide and N-substitutional phenylmaleimide is environment-friendly, convenient in operation pr