Co-ZSM-5(L)复合催化剂的制备及其催化空气环氧化烯烃的研究  

Synthesis and application of Co-ZSM-5(L) composite zeolites in the aerobic epoxidation of alkenes

作　　者：唐波[1] 鲁新环[1] 张金龙[1] 陈雄[1] 牛宗辉[1] 范鶄[1] 夏清华[1] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2012年第4期478-481,共4页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(21173073);湖北省自然科学基金(2008CAD030)资助

摘　　要：合成4-羟基苯甲醛苯甲酰腙(L1)和4-氯苯甲醛苯甲酰腙(L2)两种席夫碱配体,并通过离子交换和离子配位的方式成功制备了Co-ZSM-5(L)金属分子筛/配合物复合催化剂.采用XRD、IR和1 H NMR等手段对催化剂进行表征,表征结果表明交换到分子筛中的Co离子成功与酰腙配体配位,且分子筛的骨架没有发生变化.烯烃催化环氧化反应以空气为氧化剂,TBHP为引发剂,DMF为溶剂在常压下进行反应.结果表明,Co-ZSM-5(L)复合催化剂对苯乙烯,α-蒎烯和α-甲基苯乙烯均表现出非常优异的催化活性,烯烃的转化率均达到82%以上.Two Schiff-base ligands inclusive of 4-hydroxy benzaldehyde benzoylhydrazone(L1) and 4-chlorbenzaldehyde benzoylhydrazone(L2) had been synthesized,characterized and employed to coordinate with ion-exchanged Co-ZSM-5 to form Co-ZSM-5(L) composite zeolites.The catalytic epoxidation of alkenes was carried out at 90 ℃ under atmospheric pressure over Co-ZSM-5(L) catalysts with air in the presence of a little of TBHP as initiator and DMF as solvent.Results were shown that Co-ZSM-5(L) exhibited high catalytic activity in the epoxidation of styrene,α-pinene and α-methyl styrene.

关 键 词：Co-ZSM-5 席夫碱 催化 空气 环氧化 

分 类 号：TQ2[化学工程—有机化工]