季戊四醇四油酸酯合成反应的热力学分析  

Thermodynamic Analysis of Pentaerythritol Tetraoleate Synthesis

作　　者：张建[1] 王伟[1] 钱文珍 刘曦 刘宝勇[1] ZHANG Jian;WANG Wei;QIAN Wen-zhen;LIU Xi;LIU Bao-yong(School of Chemistry and Chemical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Environment and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Materials Science and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学化学化工学院,兰州730070 [2]兰州交通大学环境与市政工程学院,兰州730070 [3]兰州交通大学材料科学与工程学院,兰州730070

出　　处：《兰州交通大学学报》2021年第6期138-145,共8页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(11564024)。

摘　　要：以季戊四醇、油酸为原料合成季戊四醇四油酸酯的反应为一复杂反应体系.针对季戊四醇和油酸之间发生的四步连续酯化反应,采用基团贡献法分别估算了季戊四醇、油酸、季戊四醇四油酸酯以及反应过程中所涉及中间产物的热力学数据,进一步计算得到了该反应体系在403~493 K温度范围内标准摩尔反应焓变、标准摩尔反应熵变、标准摩尔反应吉布斯自由能变以及反应平衡常数.分析结果表明,该反应为吸热反应;吉布斯自由能变随反应温度的升高而降低,升高温度有利于反应向正方向移动.The synthesis of pentaerythritol tetraoleate from pentaerythritol and oleic acid was a complex reaction system.A four step continuous esterification reaction between pentaerythritol and oleic acid is chosen as the model reaction.Then the thermodynamic data of pentaerythritol,oleic acid,pentaerythritol tetraoleate and intermediate products involved in reaction process were estimated by group contribution method.Furthermore,standard molar reaction enthalpy change,standard molar reaction entropy change,Gibbs free energy change and reaction equilibrium constant of the reaction system in the temperature range from 403 K to 493 K were calculated,respectively.The results show that the reaction is endothermic.The change of Gibbs free energy decreases with the increase of reaction temperature,which is favorable for the reaction to move in the positive direction.

关 键 词：季戊四醇四油酸酯 连续酯化 基团贡献法 热力学分析 

分 类 号：TQ021.2[化学工程]