Separation of isopropyl alcohol+isopropyl acetate azeotropic mixture:Selection of ionic liquids as entrainers and vapor-liquid equilibrium validation  

作　　者：Lianzheng Zhang Jie Wang Lin Yang Dongmei Xu Yixin Ma Jun Gao Yinglong Wang 

机构地区：[1]College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第10期326-334,共9页中国化学工程学报（英文版）

基　　金：the support of the National Natural Science Foundation of China(21908131);the Natural Science Foundation of Shandong Province(ZR2019BB066);A Project of Shandong Province Higher Educational Science and Technology Program(J18KA072);Open Project of Qingdao University of Science and Technology Chemistry Department(QUSTHX202007)。

摘　　要：Based on the COSMO-SAC model,1-ethyl-3-methylimidazolium acetate and 1-ethyl-3-methylimidazolium p-toluenesulfonate were selected from 30 ILs as entrainers to investigate the separation of the isopropyl alcohol+isopropyl acetate azeotrope.Two screening indicators,σ-profile and infinite dilution selectivity(S^(∞)),were adopted as the basis.The iso baric vapor-liquid equilibrium experiments for isopropyl alcohol+isopropyl acetate binary system and isopropyl alcohol+isopropyl acetate+confirmed ILs ternary systems were performed at the pressure of atmospheric pressure.The experimental measurement demonstrated that the adopt ILs enhanced the relative volatility of the above alcohol-ester azeotrope,leading to the elimination of the azeotropic point with a certain amount ILs.Meanwhile,the thermodynamic correlation for two systems containing ILs was explored with the NRTL model,which also reflects the extensive applicability of that by comparing the deviation between experimental and calculated data.And its binary interaction parameters were regressed,which can provide a basis for its simulation process.

关 键 词：Vapor-liquid equilibrium Ionic liquids NRTL Alcohol-ester azeotrope COSMO-SAC model 

分 类 号：TQ028[化学工程]