分子筛SBA-15负载磷钨酸催化合成苯甲醛乙二醇缩醛  

Catalytic Synthesis of Benzaldehyde Glycol Acetal with H_3PW_(12)O_(40)/SBA-15 Zeolite

作　　者：隆金桥[1] 罗志荣[1] 苏丽清[1] 

机构地区：[1]百色学院化学与环境工程学院,广西百色533000

出　　处：《中国钨业》2015年第3期58-62,共5页China Tungsten Industry

基　　金：国家自然科学基金项目(41163007);广西教育厅科研项目(2013YB251)

摘　　要：以微波固相法合成SBA-15负载磷钨酸催化剂,用XRD、IR、TG、SEM进行表征,结果表明,磷钨酸与SBA-15的表面碱性羟基结合,催化剂仍保持载体的介孔结构和磷钨酸的Keggin型结构,热稳定性良好。将催化剂用于苯甲醛乙二醇缩醛的合成,探究诸因素对苯甲醛乙二醇缩醛收率的影响。在苯甲醛为0.1 mol,n(苯甲醛)∶n(乙二醇)=1∶1.5,反应时间为60 min,催化剂用量为1.5%,带水剂环己烷用量是8.0 m L的条件下,苯甲醛乙二醇缩醛收率可达到73.3%,负载后的磷钨酸催化苯甲醛乙二醇缩醛收率提高了38.8%。SBA-15 loaded phosphotungstic acid catalyst was prepared by Microwave solid phase method. The characterization results by XRD, IR, TG and SEM showed catalyst retains the Keggin type structure of Silicotungstic acid and Mesoporous structure of the carrier with good thermal stability after phosphotungstic acid binding with alkaline surface hydroxyl SBA-15. The catalyst was applied in the composing of benzaldehyde ethylene glycol acetal to study the influence of various factors on the yield of Benzaldehyde ethylene glycol acetal. Under the condition of using 0.1 mol of benzaldehyde, n （benzaldehyde）：n （ethylene glycol）=1∶1.5, with reaction time of 60 min, and catalyst usage of 1.5%, and water carrying agent cyclohexane usage of 8.0 mL, the yield of benzaldehyde ethylene glycol acetal reaches 73.3%. Therefore, the yield of benzaldehyde ethylene glycol acetal has been improved by 38.8%when catalyzed by loaded phosphotungstic acid.

关 键 词：磷钨酸 催化 苯甲醛乙二醇缩醛 微波固相 分子筛 

分 类 号：TQ224.4[化学工程—有机化工]