摘要
以无水乙醇和冰乙酸为原料,以对甲苯磺酸催化剂催化合成乙酸乙酯。采用基团贡献法估算了反应体系中乙酸、乙醇和乙酸乙酯在298.15K标准状态下的生成焓和标准熵,并且估算了这3种物质的热容随温度变化的关系式,计算了不同温度条件下反应的吉布斯自由能和标准平衡常数。通过对该反应体系的热力学计算与分析,验证了该反应在热力学上的可行性。
Ethyl acetate was synthesized by ethanol with acetic acid as raw material in the presence of supported toluene -p -sulfonic acid catalyst. The method of group contributions was applied to estimate the enthalpy and entropy of acetic acid and ethanol and ethyl acetate in the specified reacting system under the standard state. The functional correlation between the heat capacity of the three organic compounds and temperature were established. In addition, the Gibbs free energy and standard equilibrium constant of the reaction were calculated under the different temperature. Based the thermodynamics calculation and analysis of the reaction system, the conclusion which the reaction was practicable in thermodynamics could be concluded.
出处
《化工时刊》
CAS
2008年第9期5-8,共4页
Chemical Industry Times
关键词
乙酸乙酯
催化酯化
基团贡献法
热力学分析
ethyl acetate catalytic esterification group contribution thermodynamic analysis
