文献类型：期刊文献

英文题名：Synthesis of isobutyl cinnamate based on DESs catalyst: Optimization and kinetics

作者：Xu, Jumei[1,2];Zhao, Ningrui[1];Zeng, Zuoxiang[1];Xue, Weilan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：56

期号：5

起止页码：296

外文期刊名：INTERNATIONAL JOURNAL OF CHEMICAL KINETICS

收录：;EI(收录号：20240315405170);WOS:【SCI-EXPANDED(收录号:WOS:001143193200001)】；

语种：英文

外文关键词：deep eutectic solvents; esterification; isobutyl cinnamate; kinetics; optimization

摘要：In this work, the optimum process conditions and kinetics of the green synthesis of isobutyl cinnamate using deep eutectic solvents (DESs) as catalysts were investigated. Isobutyl cinnamate is a spice with low toxicity and is widely used in the food industry. However, there is a lack of reports on its green synthesis. Three DESs were prepared by adjusting the mixing ratio of choline chloride (ChCl) and p-toluenesulfonic acid (PTSA). Response surface methodology with Box-Behnken design (RSM-BBD) was used to optimize the process parameters of the esterification of cinnamic acid with isobutanol. The effects of catalyst loading, stirring speed, cinnamic acid/isobutanol molar ratio, and temperature on the conversion of cinnamic acid over time were evaluated. Using ChCl-PTSA as a catalyst, the kinetics data and chemical equilibrium constants of the esterification were determined at a temperature range of 353.15-383.15 K. The pseudo-homogeneous (PH) model based on activity was then adopted to describe the kinetics of the reaction, and the relative deviations between the experimental values and the calculated ones by PH model are less than 5.5%. Thermodynamic data (Delta rH0, Delta rS0, Delta rG0) for the esterification reaction was calculated as well. In addition, the results of six consecutive cycles of the catalyst showed that ChCl-PTSA has good stability and recyclability.