Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems

Songsong Chen; Li Dong; Junping Zhang; Weiguo Cheng; Feng Huo; Qian Su; Wei Hua

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Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems

Separation Science and Engineering | Updated：2026-01-06

- Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems
- Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems
- 中国化学工程学报（英文版） 2020年28卷第3期页码：766-776
- Affiliations：
  
  1. Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100090
  2. School of Chemical Engineering, University of Chinese Academy of Sciences,Beijing,China,100049
  3. Dalian National Laboratory for Clean Energy,Dalian,China,116023
  4. SINOPEC, Beijing Yanshan Company,Beijing,China,102500
- Author bio：
- Funds：
- DOI：
  中图分类号：
- 纸质出版：2020
- Accepted：
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Songsong Chen, Li Dong, Junping Zhang, 等. Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems[J]. 中国化学工程学报（英文版）, 2020,28(3):766-776.

Songsong Chen, Li Dong, Junping Zhang, Weiguo Cheng, Feng Huo, Qian Su, Wei Hua. Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 766-776.
Songsong Chen, Li Dong, Junping Zhang, 等. Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems[J]. 中国化学工程学报（英文版）, 2020,28(3):766-776. DOI：

Songsong Chen, Li Dong, Junping Zhang, Weiguo Cheng, Feng Huo, Qian Su, Wei Hua. Effects of imidazolium-based ionic liquids on the isobaric vapor-liquid equilibria of methanol + dimethyl carbonate azeotropic systems[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 766-776. DOI：

摘要

Abstract

The separation of methanol (MeOH) and dimethyl carbonate (DMC) is important but difficult due to the formation of an azeotropic mixture. In this work

isobaric vapor-liquid equilibrium (VLE) data for the ternary systems containing different imidazolium-based ionic liquids (ILs)

i.e

. MeOH + DMC + 1-butyl-3-methy-limidazolium bis[(trifluoromethyl)sulfonyl

]

imide ([Bmim

]

[Tf

]

)

MeOH + DMC + 1-ethyl-3-methyl-imidazolium bis [(trifluoromethyl)sulfonyl

]

imide ([Emim

]

[Tf

]

)

and MeOH + DMC + 1-ethyl-3-methylimidazolium hexafluorophosphate ([Emim

]

[PF

]

)) were measured at 101.3 kPa. The mole fraction of IL was varied from 0.05 to 0.20. The experimental data were correlated with the NRTL and Wilson equations

respectively. The results show that imidazolium-based ILs were beneficial to improve the relative volatility of MeOH to DMC

and [Bmim

]

[Tf

]

showed a much more excellent performance on the activity coefficient of MeOH. The interaction energies of system components were calculated using Gaussian program

and the effects of cation and anion on the separation coefficient of the azeotropic system were discussed.

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