摘要
采用微波固相法制备Mn(Salen)/A l-HMS催化剂,通过FT-IR、DR UV-V is和TG测试技术进行了表征。以苯乙烯为底物,PhIO为氧化剂进行环氧化反应,比较不同方法制备的催化剂的催化性能,通过考察催化剂制备过程中的微波辐射时间、氧化剂的用量及催化剂的重复使用对催化剂性能的影响规律。结果发现,微波固相法制备的Mn(salen)/A l-HMS-IP催化剂以苯乙烯为底物,PhIO为氧化剂,CH2C l2为溶剂在20℃下反应12 h,转化率可达74.6%,环氧苯乙烷选择率达94.8%,与常规方法制备的催化剂相比具有很好的催化活性。
Here we report a novel preparation method of Mn （Salen）/Al-HMS catalysts through host-guest interaction between Mn （Salen） complex and mesoporous Al-HMS under microwave irradiation （MWI）. FT-IR, DR UV-Vis and TG measurement results indicate that Mn （Salen） complex could be successfully immobilized on mesoporous Al-HMS. Styrene epoxidation with PhIO as oxidant was carried out to test the effect of the catalyst prepared with different preparation methods on the catalytic activity and selectivity. It was found that the catalyst of Mn（ Salen）/Al-HMS-IP1 shows a good conversion of styrene（74. 6% ） and the best selectivity for phenyloxirane（94. 8% ）. Moreover, radiation time, quantity of oxidant and recycle times were investigated to investigate their effects on the catalytic performance.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第6期646-650,共5页
Chinese Journal of Applied Chemistry
基金
湖北省教育厅青年基金资助项目(Q20052700)
