SO_4^(2-)/SnO_2/SBA-15固体酸催化剂的制备及其在环酮缩合反应中的应用  

Preparation and Application of SO_4^(2-)/SnO_2/SBA-15 Solid Acid Catalyst for Acetalization of Cyclic Ketones

作　　者：杨志旺[1] 洪伟[1] 王佳[1] 陈丽娜[1] 贾娜[1] 赵磊[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》2012年第5期827-832,共6页

基　　金：国家自然科学基金(21163016; 21174114);甘肃省自然科学基金(1010RJZA024);西北师范大学创新基金(NWNU- KJCXGC-03-63)~~

摘　　要：采用等体积浸渍法制备了不同负载量的固体酸催化剂SO42-/SnO2/SBA-15,利用X射线粉末衍射、N2吸附-脱附和透射电镜等手段对样品进行了表征,并考察了催化剂对4-叔丁基环己酮与乙二醇缩合反应的催化性能.结果表明,SO42-/SnO2催化剂负载于SBA-15后其催化性能明显改善.研究了SO42-/20%SnO2/SBA-15催化剂上部分酮类化合物与乙二醇及1,2-丙二醇的缩合反应,并考察了反应时间和催化剂用量等因素对反应性能的影响.在适宜的温和条件下,一些环酮类底物如环己酮、4-甲基环己酮和4-叔丁基环己酮等均可反应得到相应的缩醛化产物,且催化剂至少可循环使用4次.SO42-/SnO2/SBA-15 catalyst samples with different amounts of SnO2 were prepared by a wetness impregnation method and characterized by X-ray diffraction,N2 adsorption-desorption,and transmission electron microscopy.Their catalytic performance for the acetalization of 4-tert-butylcyclohexanone with glycol was investigated.The results showed that SBA-15 supported SO42-/SnO2 improved the catalytic activity markedly,which was caused by the increasing surface area of the sulfated tin oxide.The catalytic performance of SO42-/20%SnO2/SBA-15 for acetalization of several cyclic ketones with diols was also explored.Under the optimum conditions,a series of cyclic ketones such as cyclohexanone,4-methylcyclohexanone,and 4-tert-butylcyclohexanone were well transformed into the corresponding products.The catalyst can be reused for several times without any significant loss in catalytic activity.

关 键 词：硫酸氧化锡 SBA-15 分子筛 固体酸 环酮 乙二醇 缩合反应 

分 类 号：O643.32[理学—物理化学]