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《Acta Chimica Sinica》 2004-15
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Preparation of Amphiphilic TS-1 Zeolites and Their Phase-boundary Catalysis

ZHOU, Wei MENG, Fan-Lei XU, Qin-Hua DONG, Jia-Lu CHUN, Yuan (Department of Chemistry, Key Laboratory of Mesoscopic Materials, Nanjing University, Nanjing 210093)  
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 cm 2) to the usage of catalyst (in mg) was around 0.15.
【Fund】: 国家自然科学基金 (No.34456545);; 南京大学分析测试中心资助项目
【CateGory Index】: O643.3
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