Liquid-phase esterification of methacrylic acid with methanol catalyzed by cation-exchange resin in a fixed bed reactor:Experimental and kinetic studies  

作　　者：Junyang Liu Luming Wang Yuhang Bian Chunshan Li Zengxi Li Jie Li 

机构地区：[1]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [2]Beijing Key Laboratory of Ionic Liquids Clean Process,Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [3]Langfang Technological Center of Green Industry,Langfang 065801,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第6期1-10,共10页中国化学工程学报（英文版）

基　　金：the National Natural Science Fund for Distinguished Young Scholars(22025803);supported by the National Natural Science Foundation of China(22178338);the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL Fund 2021018);the financial support of project“Research and development and industrial application of new catalytic materials for green synthesis of MMA to replace highly toxic HCN”(Hebei,20374002D)。

摘　　要：The kinetic behavior of esterification between methacrylic acid and methanol catalyzed by NKC-9 resin was studied in a fixed bed reactor.The reaction was conducted in the temperature range of 323.15 to 368.15 K with the molar ratio of reactants from 0.8 to 1.4 under certain pressure.The measurement data were regression with the pseudo-homogeneous(P-H),Eley-Rideal(E-R),and Langmuir-Hinshelwood(L-H)heterogeneous kinetic models.Independent adsorption experiments were implemented to gain the adsorption equilibrium constants of four components.Among the above three models,the L-H model exhibited the best fitting results.The stability of NKC-9 was evaluated by long-term running with the yield of methyl methacrylate no decrease during 3000 h operation.The structure and physicochemical properties of the new and used catalyst were performed by several characterizations including thermogravimetric analysis(TG),scanning electron microscope(SEM),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FT-IR)and so on.

关 键 词：Kinetics ESTERIFICATION Methyl methacrylate Cation-exchange resin Fix bed reactor 

分 类 号：TQ225.24[化学工程—有机化工]