关键词: 两亲性沸石, 制备, 表征, TS-1, 相界面催化

Amphiphilic TS-1 zeolites were prepared from TS-1 zeolite modified with trimethylchlorosilane and n-octadecyltrichlorosilane respectively.These amphiphilic zeolites were oriented at the water-organic boundary.Samples after modification retained their original crystal structure and Ti in these zeolites remained tetrahedral coordination, while the crystal morphology was changed.These amphiphilic Ti-containing zeolites showed good catalytic performance in the 1-octene and aqueous hydrogen peroxide phase-boundary epoxidation reaction without adding co-solvents and stirring.Especially by the TS-1 modified with trimethylchlorosilane, much higher catalytic activity was achieved than by parent TS-1 zeolite in the phase-boundary catalysis.In phase-boundary catalysis, the area of the phase-boundary and the amount of catalyst are the two important affecting factors.The amphiphilic TS-1 zeolite showed the highest catalytic activity when the ratio of the area of the phase-boundary (in cm²) to the usage of catalyst (in mg) was around 0.15.

Key words: amphiphilic zeolite, preparation, characterization, TS-1, phase-boundary catalysis