| SiO2负载磷钨酸铯盐催化剂上香兰素与1，2-丙二醇的缩合反应 |
| |
| 引用本文： | 沈传磊,刘平,王军. SiO2负载磷钨酸铯盐催化剂上香兰素与1，2-丙二醇的缩合反应[J]. 陶瓷科学与艺术, 2010, 32(2): 22-25,30 |
| |
| 作者姓名： | 沈传磊 刘平 王军 |
| |
| 作者单位： | 南京工业大学化学化工学院材料化学工程国家重点实验室; |
| |
| 基金项目： | 国家自然科学基金资助项目(20476046) |
| |
| 摘 要： | 制备一系列硅胶(SiO2)负载的磷钨酸铯盐催化剂,将其用于香兰素与1,2-丙二醇的缩合反应,合成香兰素丙二醇缩醛,考察催化剂中Cs+取代数、磷钨酸铯盐负载量、催化剂用量、1,2-丙二醇与香兰素摩尔比及反应时间对缩合反应的影响.结果表明:磷钨酸铯盐的Cs+取代数为2.5、负载量为40%时催化剂活性最高;在反应温度368 K、n(1,2-丙二醇)/n(香兰素)=2.4、催化剂用量占反应体系质量分数1.5%、带水剂苯的用量30 mL、回流反应3 h的条件下,香兰素的转化率达到86.6%,香兰素丙二醇缩醛的选择性为100%.
|
| 关 键 词： | 磷钨酸铯盐 香兰素 杂多酸 硅胶 1 2-丙二醇 |
Condensation reaction of vanillin with 1,2-propanediol over silica supported cesium phosphotungstate catalysts |
| |
| SHEN Chuan-lei,LIU Ping,WANG Jun. Condensation reaction of vanillin with 1,2-propanediol over silica supported cesium phosphotungstate catalysts[J]. Ceramics Science & Art, 2010, 32(2): 22-25,30 |
| |
| Authors: | SHEN Chuan-lei LIU Ping WANG Jun |
| |
| Affiliation: | State Key Laboratory of Materials-Oriented Chemical Engineering/a>;College of Chemistry and Chemical Engineering/a>;Nanjing University of Technology/a>;Nanjing 210009/a>;China |
| |
| Abstract: | A series of cesium phosphotungstate catalysts supported on silica gel(SiO2) were prepared and used to catalyze the condensation reaction of vanillin with 1,2-propanediol into vanillin propylene glycol acetal.Effects of substituted number of Cs+,loading of cesium phosphotungstate,catalyst amount,mole ratio of 1,2-propanediol to vanillin,and reaction time on the reactivity were investigated.Results showed that the catalyst with Cs+ substituted number of 2.5,and Cs salt loading of 40% exhibited the highest act... |
| |
| Keywords: | cesium phosphotungstate vanillin heteropolyacid silica 1 2-propanediol |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
