文献类型：期刊文献

中文题名：对甲基苯甲酸液相催化氧化动力学

英文题名：Kinetics of Liquid-Phase Catalytic Oxidation of p-Toluic Acid

作者：孙伟振[1];杨洋[1];周兴贵[1];赵玲[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2007

卷号：23

期号：1

起止页码：8

中文期刊名：化学反应工程与工艺

外文期刊名：Chemical Reaction Engineering and Technology

收录：CSTPCD;;EI(收录号：20072410653185);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市重大基础研究项目(05DJ14002)

语种：中文

中文关键词：对甲基苯甲酸;对羧基苯甲醛;对苯二甲酸;液相氧化;串联反应;动力掌

外文关键词：p-toluic acid; 4-carboxybenzaldehyde; terephthalic acid; liquid-phase oxidation;reactions in series; kinetics

摘要：研究了以醋酸钴和醋酸锰为催化剂、氢溴酸为促进剂,在169～192℃下对甲基苯甲酸(p-TA)的液相氧化反应动力学。采用幂函数动力学模型对实验数据进行了拟合。结果表明,对甲基苯甲酸液相氧化反应是串联反应,甲基苯甲酸和中间产物对羧基苯甲醛的反应级数均为1。拟合得到的活化能数据表明对甲基苯甲酸氧化为整个反应的控制步骤。利用该动力学模型能够成功预测186℃下液相组分随时间的变化趋势。实验表明,当金属离子的配比满足[Co^(2+)]/[Mn^(2+)]为3:1时,催化剂具有最高的活性。
The liquid-phase oxidation of p-toluic acid, catalyzed by cobalt acetate and manganese acetate and promoted by hydrobromic acid was investigated at the temperatures ranging from 169 ℃ to 192 ℃. Experimental data were fitted by power-law reaction kinetic equations, and the reaction was first order with respect to both p-toluic acid and 4-carboxybenzaldehyde. Also, the first step was found to be the controlling step in the reaction network. The changes of liquid-phase components with time at 186 ℃ were predicted satisfactorily by the model. It was also found that the catalyst had the highest activity when [Co^2＋]/[Mn^2＋] was 3 ： 1.