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

doi:10.1016/j.cjche.2022.07.022

Chinese Journal of Chemical Engineering ›› 2022, Vol. 50 ›› Issue (10): 326-334.DOI: 10.1016/j.cjche.2022.07.022

• Chemical Engineering Thermodynamics • Previous Articles Next Articles

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

Lianzheng Zhang¹, Jie Wang¹, Lin Yang¹, Dongmei Xu¹, Yixin Ma¹, Jun Gao¹, Yinglong Wang²

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

Received:2022-03-11 Revised:2022-07-17 Online:2023-01-04 Published:2022-10-28
Contact: Jun Gao,E-mail:gao@sdust.edu.cn
Supported by:
The authors are grateful to the support of the National Natural Science Foundation of China (21908131), the Natural Science Foundation of Shandong Province (ZR2019BB066), and A Project of Shandong Province Higher Educational Science and Technology Program (J18KA072), and Open Project of Qingdao University of Science and Technology Chemistry Department (QUSTHX202007).

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

Lianzheng Zhang¹, Jie Wang¹, Lin Yang¹, Dongmei Xu¹, Yixin Ma¹, Jun Gao¹, Yinglong Wang²

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

通讯作者: Jun Gao,E-mail:gao@sdust.edu.cn
基金资助:
The authors are grateful to the support of the National Natural Science Foundation of China (21908131), the Natural Science Foundation of Shandong Province (ZR2019BB066), and A Project of Shandong Province Higher Educational Science and Technology Program (J18KA072), and Open Project of Qingdao University of Science and Technology Chemistry Department (QUSTHX202007).

Abstract

Abstract: 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 isobaric 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.

Key words: Vapor-liquid equilibrium, Ionic liquids, NRTL, Alcohol-ester azeotrope, COSMO-SAC model

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 isobaric 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

Lianzheng Zhang, Jie Wang, Lin Yang, Dongmei Xu, Yixin Ma, Jun Gao, Yinglong Wang. Separation of isopropyl alcohol + isopropyl acetate azeotropic mixture: Selection of ionic liquids as entrainers and vapor-liquid equilibrium validation[J]. Chinese Journal of Chemical Engineering, 2022, 50(10): 326-334.

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

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

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