锆基催化剂合成醇醚醋酸酯的非等温反应动力学  

The Kinetics of Synthesis of 2-Alkoxyethyl Acetate with Zirconium Base Catalyst Under Non-isothermal Condition

作　　者：李峰[1] 何静[1] 张保国[1] 孙鹏[1] 段雪[1] 王作新[1] 

机构地区：[1]北京化工大学应用化学系

出　　处：《北京化工大学学报（自然科学版）》1996年第4期53-58,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：利用锆基催化剂合成乙二醇单甲醚醋酸酯、乙二醇单乙醚醋酸酯和乙二醇单丁醚醋酸酯，取得了满意的结果．同时根据非等温变体积条件下的动态法锆基催化剂合成醇醚醋酸酯液－固相反应的特点，导出了反应速率方程．计算结果表明，乙二醇单甲醚醋酸酯、乙二醇单乙醚醋酸酯和乙二醇单丁醚醋酸酯的合成反应服从二级动力学模型，表观反应活化能分别为１１４．７４ｋＪ／ｍｏｌ，１２５．７５ｋＪ／ｍｏｌ和１５５．３２ｋＪ／ｍｏｌ，频率因子分别为１．２０×１０１４Ｌ·ｍｏｌ－１·ｍｉｎ－１，１．２７×１０１６Ｌ·ｍｏｌ－１·ｍｉｎ－１和８．５６×１０１９Ｌ·ｍｏｌ－１·ｍｉｎ－１．计算结果的合理性和一致性，证明了利用动态原理对此反应体系的动力学研究的简便可行性．According to the catalytic characteristic of zirconium base catalyst,2-mcthoxyethyl acetate, 2-ethoxyethyl acetate and 2-butox-yethyl acetate have been synthesized by dynamic method, and the equation or reaction rate has be deduced under the non-isothermal and volume-varying condition. By kinetic calculation, it is proved that the synthetic reaction is consistent with the Secondary dynamic model, the three apparent activation energy of synthesis of 2-methoxyethyl acetate, 2-ethoxyethyl acetate and 2-butoxyethyl acetate are 114.74 kJ/ mol, 125.75 kJ/mol and155.32kJ/mol respectively, and the three frequency factors are 1. 20×1014 L. mol-1. min-1、 1.27×1016 L. mol-1. min-1 and 8.57×1019 L. mol-1. min-1.

关 键 词：反应动力 锆 催化剂 醇醚醋酸酯 非等温 

分 类 号：O643.1[理学—物理化学] O623.624.2[理学—化学]