Reaction kinetics for the heterogeneously resin-catalyzed and homogeneously self-catalyzed esterification of thioglycolic acid with 2-ethyl-1-hexanol  

作　　者：Xiaoda Wang Wenkai Li Shiwei Wang Qinglian Wang Ling Li Hongxing Wang Ting Qiu 

机构地区：[1]Engineering Research Center of Reactive Distillation,Fujian Province University,School of Chemical Engineering,Fuzhou University,Fuzhou 350108,China [2]College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第8期111-119,共9页中国化学工程学报（英文版）

基　　金：the financial support for this work from the National Natural Science Foundation of China(No.21706034);the Guiding Project of Fujian Province(No.2018H0016);the Open Foundation of State Key Laboratory of Chemical Engineering(No.SKL-ChE-18B02);the Integration of Industry,Education and Research of Fujian Province(No.2018Y4008).

摘　　要：Producing 2-ethyl-1-hexyl thioglycolate(ETE)via esterification reaction with thioglycolic acid(TGA)aqueous solution as raw material by reactive-separation coupling technology is a promising process intensification method.To choose suitable reactive-separation coupling strategy,the kinetic studies of the esterification of TGA with 2-ethyl-1-hexanol(EHL)were carried out in a batch system.The commercial ion exchange resin was employed as an eco-friendly catalyst.The effects of temperature,catalyst concentration and molar ratio were determined.It was interesting to observe that the equilibrium conversion of TGA increased with the increase of catalyst mass fraction due to the adsorption of product water onto resin surface.The activity-based pseudo-homogeneous(PH),Eley-Rideal(ER)and Langmuir-Hinshelwood-Ho ugen-Watson(LHHW)models were used to fit the kinetics data of the resin-catalyzed reaction.The models of ER and LHHW performed better than the PH model.The kinetics of the TGA-self-catalyzed reaction was also determined.An activity-based homogeneous kinetics model could well describe this self-catalyzed reaction.These results would be meaningful to the selection and design of an appropriate reactionseparation strategy for the production of ETE,to realize the process intensification.

关 键 词：Kinetics AUTOCATALYSIS Kinetic modeling 2-Ethyl-1-hexyl thioglycolate ESTERIFICATION Ion exchange resin 

分 类 号：TQ225.24[化学工程—有机化工] TQ426