常压丙烯催化环氧化制环氧丙烷

Preparation of Propene Epoxide by Catalyzed Epoxidation of Propene at Normal Atmosphere

研究了常压、气-液-固三相条件下TS-1催化丙烯环氧化反应,利用气体及时将反应产物环氧丙烷从反应体系中直接分离,避免了进一步转化为副产物。考察了反应温度、压力、催化剂用量、反应时间、丙烯流速和载气流速对反应的影响。在最佳的反应条件下,过氧化氢的转化率、有效利用率和环氧丙烷的选择性分别达到95.3%、98.4%和85.3%。本反应体系的主要优点是反应产物可以在反应的同时进行分离,强化了反应过程,具有工业化前景。

Epoxidation of propene catalyzed by TS-1 has been investigated in a gas-liquid-solid mode with simultaneous separation of propene epoxide. Effects of the main factors, such as reaction temperature, pressure, amount of catalyst, reaction time and flowrates of propene and the inert gas, on the reaction were discussed. The results showed that under the optimal conditions, the conversion and utilization efficiency of H2O2 and the selectivity of propene epoxide were 95.3 %, 98.4 % and 85.3 %, respectively. The advantage of this process is that the product of propene epoxide can be separated simultaneously, the unreacted propene and the inert gas can be recycled and the catalyst can be separated through conventional techniques. This process is feasible for industrial usage.