文献类型：期刊文献

英文题名：Kinetics of p-toluene-sulfonic acid catalyzed direct esterification of pentaerythritol with acrylic acid for pentaerythritol diacrylate production

作者：Sun, Li[1];Zhu, Lin[1];Xue, Weilan[1];Zeng, Zuoxiang[1]

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

年份：2020

卷号：207

期号：3

起止页码：331

外文期刊名：CHEMICAL ENGINEERING COMMUNICATIONS

收录：;EI(收录号：20191306695585);WOS:【SCI-EXPANDED(收录号:WOS:000463518200001)】；

语种：英文

外文关键词：Acrylic acid; Esterification; Kinetics; Mechanism; Pentaerythritol; Pentaerythritol diacrylate

摘要：Pentaerythritol diacrylate (PEDA) is synthesized by p-toluene-sulfonic acid (p-TSA) catalyzed direct esterification of pentaerythritol (PER) with acrylic acid (AA). Based on the direct esterification reaction mechanism and the corresponding two simplified reaction steps, the kinetic model is derived. The kinetic parameters are determined by Global Optimization Method-Genetic Algorithm procedure with an error minimization algorithm. It is found that the model can fit the reaction data very well. Furthermore, the effects of operating conditions such as reaction temperature and catalyst concentration are also investigated. The results show that the reaction rate constants increase with the temperature in the range of 373-403 K, and they increase with the catalyst concentration up to 1.12 wt% and then change slightly. The activation energy of mono-esterification is 34.57 kJ center dot mol(-1), which is higher than di-esterification (23.23 kJ center dot mol(-1)), indicating that mono-esterification step is more sensitive to the temperature variation.