纳米氧化锡催化烯烃液相环氧化反应的研究  

Epoxidation of Olefins in the Liquid Phase Catalyzed by Nano-SnO_2

作　　者：张金龙[1] 鲁新环[1] 唐波[1] 雷静[1] 陈雄[1] 周丹[1] 夏清华[1] 

机构地区：[1]湖北大学有机功能分子合成与应用教育部重点实验室,化学化工学院,武汉430062

出　　处：《复旦学报（自然科学版）》2012年第5期621-625,共5页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目(20901023;21173073);湖北省自然科学基金资助项目(2011CBD065)

摘　　要：采用自制的纳米SnO_2为催化剂,以环境友好的H_2O_2(30%)为氧源,考察其催化烯烃环氧化的反应效果.通过FT-IR光谱、UV-Vis光谱、XRD和TEM对SnO_2催化剂进行了表征.研究发现纳米SnO_2对烯烃的液相环氧化具有非常好的催化效果,并以环己烯为例对反应条件做了相关探讨.实验结果表明,在温度为50℃,H_2O_2与环己烯摩尔比为1.2时,烯烃转化率达到99.9%,环氧选择性高达98.1%.且催化剂循环使用9次催化活性没有发生明显变化.Nano-SnO2 ,prepared by hydrothermal method, has been characterized by FT-IR, UV-Vis, XRD, and TEM technologies and applied in the epoxidation of alkenes using H2O2（30%）as the oxidant. Under our experimental conditions, the results show that nano-SnO2 exhibits excellent catalytic activities in the titled reactions, e.g. 99.9% conversion of cyclohexene with 98.1% epoxide selectivity is achieved over the catalyst with 1.2 eq. of HeO2 at 50℃. Recycling experiments suggest the the solid catalyst can be reused 9 times without any appreciable loss of catalytic activity.

关 键 词：纳米SNO2 烯烃 环氧化 H2O2 

分 类 号：O643.32[理学—物理化学]