SBA-15负载硅钨酸催化环己酮Baeyer-Villiger氧化  

Baeyer-Villiger Oxidation of Cyclohexanone Catalyzed by SBA-15 Supported Silicotungstic Acid

作　　者：杨志旺[1] 马振宏[1] 牛棱渊[1] 马国富[1] 马恒昌[1] 雷自强[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《催化学报》2011年第3期463-467,共5页

基　　金：国家自然科学基金(20774074);甘肃省自然科学基金(3ZS061-A25-018);西北师范大学创新基金(NWNU-KJCXGC-03-56)

摘　　要：采用浸渍法制备了H4O40SiW12/SBA-15催化剂,通过红外光谱、X射线衍射、N2吸附-脱附和透射电镜等方法对催化进行了表征.结果表明,H4O40SiW12能均匀分散于SBA-15的孔道中,催化剂仍保持载体的介孔结构和硅钨酸的Keggin型构.将催化剂用于环己酮的Baeyer-Villiger氧化反应中,考察了催化剂用量、温度和时间等对反应性能的影响.当催化剂用为10mg,在70oC反应8h时,环己酮转化率达86%,产物内酯选择性可达99%.同时,催化剂具有一定的重复使用性能.Silicotungstic acid （H4O40SiW12） was supported on SBA-15 with the content of 20% by impregnation. The structure and properties of the catalyst were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, N2 adsorption-desorption, and transmis- sion electron microscopy.H4O40SiW12 was highly dispersed on SBA-15 without structural change. The material was applied as an efficient catalyst for the Baeyer-Villiger oxidation of cyclohexanone under different conditions such as the catalyst amount, reaction temperature, and reaction time. When 10 mg of catalyst was used, the cyclohexanone conversion and selectivity for lactone were up to 86% and 99%, respectively, at 70℃ for 8 h. The catalyst had moderate reusability in the oxidation system.

关 键 词：环己酮 Baeyer-Villiger氧化反应 内酯 硅钨酸 SBA-15分子筛 

分 类 号：TQ203.2[化学工程—有机化工]