| 超声辅助SiW_(12)/SiO_2催化合成乙酸苄酯及动力学 |
| |
| 引用本文： | 陈曦,王俊,韩越,吕效平,韩萍芳.超声辅助SiW_(12)/SiO_2催化合成乙酸苄酯及动力学[J].陶瓷科学与艺术,2011(4). |
| |
| 作者姓名： | 陈曦 王俊 韩越 吕效平 韩萍芳 |
| |
| 作者单位： | 南京工业大学化学化工学院; |
| |
| 基金项目： | 南京工业大学博士论文创新基金资助项目(BSCX200804) |
| |
| 摘 要： | 制备负载型硅钨酸(SiW12/SiO2)催化剂,并在超声条件下将催化剂应用于乙酸苄酯的合成中。采用红外光谱仪(IR)和X线衍射仪(XRD)对催化剂进行表征。考察反应温度、催化剂用量、醇酸摩尔比和反应时间对酯化率的影响,并建立了动力学方程。结果表明:所制备的催化剂具有Keggin的结构;在超声频率10 kHz、超声声强1.0 W/cm2的条件下,得到最适宜的反应条件为反应温度110℃、催化剂用量1.5 g、醇酸摩尔比值1.5、反应时间75 min。在最优条件下,酯化率可达95.3%。
|
| 关 键 词： | 乙酸苄酯 超声 苯甲醇 乙酸 动力学 |
Ultrasound assisted heteropoly acid catalyst SiW_(12)/SiO_2 for synthesis of benzyl acetate and kinetics |
| |
| Affiliation: | CHEN Xi,WANG Jun,HAN Yue,Lü Xiaoping,HAN Pingfang(College of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China) |
| |
| Abstract: | Under ultrasonic radiation,the benzyl acetate was synthesized from benzyl alcohol and glacial acetic acid in the presence of SiW12/SiO2 catalyst.The catalyst was characterized by infrared spectrometry(IR) and X-ray diffraction(XRD).Effects of reaction temperature,the amount of catalyst,molar ratio of benzyl alcohol to glacial acetic acid,and reaction time on the esterification yield were discussed,and the kinetics of benzyl acetate was investigated.Results showed that heteropolyacid retained the Keggin-type... |
| |
| Keywords: | benzyl acetate ultrasound benzyl alcohol glacial acetic acid kinetics |
| 本文献已被 CNKI 等数据库收录！ |
|
