Ionic liquids as entrainer in extractive distillation for effectively separating 1-propanol–water azeotropic mixture

作     者：Xinqiang You Kai Zhao Ling Li Ting Qiu Xinqiang You;Kai Zhao;Ling Li;Ting Qiu

作者机构：Fujian Universities Engineering Research Center of Reactive Distillation TechnologyLaboratory of Chemical Process IntensificationSchool of Chemical EngineeringFuzhou UniversityFuzhou 350108China Qingyuan Innovation LaboratoryQuanzhou 362801China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第9期

页      面：224-233页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070304[理学-物理化学(含∶化学物理)] 081701[工学-化学工程] 0703[理学-化学] 

基　　金：supported by the Natural Science Foundation of Fujian Province,China(2021J01641) National Natural Science Foundation of China(21706062) the Scientific Research Starting Foundation of Fuzhou University,China(GXRC-18073) 

主　　题：Ionic liquids(ILs) Extractive distillation(ED) Process optimization Energy saving Evaluation indicator Optimal design 

摘      要：Economically separating 1-propanol(NPA)from water is an emergent issue for producing pharmaceutical intermediates such as n-propyl acetate,n-propylamine and so *** this work,fourionic liquids(ILs)1-ethyl-3-methylimidazolium thiocyanate([EMIM][SCN]),1-butyl-3-methylimidazolium tetrafluoroborate([BMIM][BF_(4)]),1,3-dimethylimidazolium methylsulfate([MMIM][MS]),1,3-dimethylimidazolium dimethylphosphate([MMIM][DMP])were introduced as potential entrainers for separating NPA–water azeotropic *** results show that[MMIM][MS]is the most suitable entrainer compared with other ILs from the analysis of vapor-liquid equilibrium and relative *** extractive distillation process with the entrainer regeneration system of flash tank and stripper was employed and optimized by the two-step optimization *** results show that total annual cost and energy consumption per product flow rate were reduced by 39.79%and 60.47%compared with *** addition,the efficiency indicator of extractive section,efficiency indicator of per tray in extractive section,carbon dioxide emissions were also selected as the evaluation index for selection of operating parameters and calculated for different *** CO_(2)emissions of the optimal design can be reduced by 60.98%from environmental aspect.