化学工程2011，Vol.39Issue(12)：48-51,68,5.
苄胺与碳酸二甲酯甲基化反应体系热力学分析
Thermodynamic analysis of methylation of benzylamine with dimethyl carbonate
朱茂电 1胡静 2刘绍英 3王公应1
作者信息
- 1. 中国科学院成都有机化学研究所,四川成都610041
- 2. 中国科学院研究生院,北京100049
- 3. 常州轻工职业技术学院,江苏常州213164
- 折叠
摘要
Abstract
The enthalpy changes, entropy changes, Gibbs free energy changes and equilibrium constants in the reaction of dimethyl carbonate with benzylamine were calculated by the methods of Benson and Joback group contributions. The effects of reaction temperature on methylation reaction and methoxy carbonylation reaction of dimethyl carbonate with benzylamine were discussed. The calculated results show that methylation reaction is an endothermic reaction, and it is spontaneous process in the range of 373. 15-453. 15 K. The reaction equilibrium constant K(Ο-p) decreases with increasing temperature. Compared with the methoxy carbonylation reaction, the methylation reaction of dimethyl carbonate with benzylamine is thermodynamically dominant reaction. The reaction equilibrium constant of methylation reaction is larger than that of methoxy carbonylation reaction. The selectivity of the methylation reaction can be improved by elevating temperature.关键词
苄胺/碳酸二甲酯/甲基化/热力学Key words
benzylamine/ dimethyl carbonate/ methylation/ thermodynamics分类
化学化工引用本文复制引用
朱茂电,胡静,刘绍英,王公应..苄胺与碳酸二甲酯甲基化反应体系热力学分析[J].化学工程,2011,39(12):48-51,68,5.
