首页 | 本学科首页   官方微博 | 高级检索  
     检索      

由苯经水促高选择性阳极乙酰氧化法一步合成乙酸苯酯
引用本文:裴娟,秦松,李桂英,胡常伟.由苯经水促高选择性阳极乙酰氧化法一步合成乙酸苯酯[J].化学物理学报,2011,24(2):244-248.
作者姓名:裴娟  秦松  李桂英  胡常伟
作者单位:四川大学化学学院绿色化学与技术教育部重点实验室,成都610064;四川大学化学学院绿色化学与技术教育部重点实验室,成都610064;四川大学化学学院绿色化学与技术教育部重点实验室,成都610064;四川大学化学学院绿色化学与技术教育部重点实验室,成都610064
摘    要:采用恒电流方法,电解苯和乙酸一步合成乙酸苯酯,研究了水对反应效率的影响.和无水体系相比,加入水提高了反应的电流效率和乙酸苯酯的选择性.在优化得到的最佳反应条件下,反应的电流效率和产物的选择性分别可达4.8%和96%.乙酸苯酯的浓度随着时间的延长呈线性增加的趋势,反应12 h后乙酸苯酯的浓度达1.07 g/L,选择性保持在95%以上.反应机理的研究表明,该反应可能涉及吸附活化苯的机理,主要副反应是Kolbe反应.水的加入促进了苯在铂片电极表面的吸附,从而提高了反应的效率和乙酸苯酯的选择性.

关 键 词:阳极乙酰氧化法,苯,乙酸水溶液,乙酸苯酯,机理
收稿时间:2010/11/27 0:00:00

Water-promoted One-step Anodic Acetoxylation of Benzene to Phenyl Acetate with High Selectivity
Juan Pei,Song Qin,Gui-ying Li and Chang-wei Hu.Water-promoted One-step Anodic Acetoxylation of Benzene to Phenyl Acetate with High Selectivity[J].Chinese Journal of Chemical Physics,2011,24(2):244-248.
Authors:Juan Pei  Song Qin  Gui-ying Li and Chang-wei Hu
Institution:Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
Abstract:One-step anodic acetoxylation of benzene to phenyl acetate was studied in acetic acid-water solution using a one-compartment electrochemical cell in galvanostatic mode. Compared to the anhydrous system, the addition of water improved the current efficiency for the electro-synthesis of phenyl acetate. The maximum efficiency reached 4.8% with the selectivity of 96% to phenyl acetate when the electrolysis was carried out under the optimal conditions. The investigation also indicated that the concentration of phenyl acetate increased linearly in 12 h and reached 1.07 g/L with the selectivity of 95%. Cyclic voltammetry experiments showed that the adsorption of benzene at Pt anode enhanced by the addition of water was critical to the formation of phenyl acetate. An activated benzene mechanism was proposed for the anodic acytoxylation, and the analysis of gas products demonstrated that Kolbe reaction was the main side reaction.
Keywords:Anodic acetoxylation  Benzene  Acetic acid aqueous solution  Phenyl acetate  Mechanism
点击此处可从《化学物理学报》浏览原始摘要信息
点击此处可从《化学物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号