关键词: TS-1, 放大研究, 环氧化

Abstract: Samples of titanium-silicalite molecular sieve were prepared in various size autoclaves (0.2 L, 2 L, 100 L and 2 m3) by using complex agent to improve the stability of titanium source. These samples were characterized by XRD, FT-IR, SEM and micro-structure analysis techniques, and their catalytic performances for propylene epoxidation were also studied. Results showed that the samples of TS-1 molecular sieve prepared by various scales exhibited the same framework structure and having uniform crystals. Using catalysts prepared by these TS-1 samples under the same reaction conditions, the conversion of hydrogen peroxide and the selectivity of propylene oxide were all more than 90%, which indicated that the enlargement of TS-1 molecular sieve preparation was successful and easy to be reproduced.

Key words: titanium silicalite molecular sieve, bench-scale research, epoxidation