Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (8): 1335-1339.doi: 10.1016/j.cjche.2015.05.004


Reaction kinetics of isopropyl palmitate synthesis

Lili Fu1,2, Yinge Bai3, Gaozhi Lü4, Denggao Jiang1   

  1. 1 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China;
    2 Henan Province Product Quality Supervision and Inspection Center, Zhengzhou 450004, China;
    3 Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China;
    4 Henan EPRI Hitech Group Co., Ltd, Zhengzhou 450052, China
  • Received:2014-10-17 Revised:2015-04-27 Online:2015-08-28 Published:2015-09-26
  • Contact: Denggao Jiang

Abstract: In this study, the kinetics of isopropyl palmitate synthesis including the reaction mechanism was studied based on the two-step noncatalyticmethod. The liquid-phase diffusion effect on the reaction process was eliminated by adjusting the stirring rate. The results showed that the two-step reaction followed a tetrahedral mechanism and conformed to second-order reaction kinetics. Nucleophilic attack on the carbonyl carbon afforded an intermediate, containing a tetrahedral carbon center. The intermediate ultimately decomposed by elimination of the leaving group, affording isopropyl palmitate. The experimental data were analyzed at different temperatures by the integral method. The kinetic equations of the each step were deduced, and the activation energy and frequency factor were obtained. Experiments were performed to verify the feasibility of kinetic equations, and the result showed that the kinetic equations were reliable. This study could be very significant to both industrial application and determining the continuous production of isopropyl palmitate.

Key words: Isopropyl palmitate, Reaction kinetics, Chemical reaction, Preparation, Chloridization, Palmitic acid