| 摘要 |
<p>The present invention provides a catalyst and the preparation process thereof and a process of epoxidising olefin using the catalyst. The catalyst contains a binder and a titanium silicate, the binder being an amorphous silica, the titanium silicate having a MFI structure, and the crystal grain of the titanium silicate having a hollow structure, with a radial length of 5-300nm for the cavity portion of the hollow structure, wherein the adsorption capacity of benzene measured for the titanium silicate under the conditions of 25 degrees C, P/P 0 = 0.10 and 1 h of adsorption time is at least 70 mg/g, and there is a hysteresis loop between the adsorption isotherm and the desorption isotherm for nitrogen adsorption by the molecular sieve at a low temperature; wherein based on the total amount of the catalyst, the content of the binder is 3-15 wt%, and the content of the titanium silicate is 85-97 wt%; and the catalyst has a crushing strength value of not less than 60N/cm measured according to GB3635-1983 standard method. The catalyst according to the present invention has high strength, and shows high catalytic activity in the epoxidation of olefins.</p> |
