Isothermal Vapor-Liquid Equilibrium for Ternary Mixtures of Ethanol, Benzene and Phosphonium-based Ionic Liquids at 313.15 K 


Vol. 31,  No. 4, pp. 254-259, Dec.  2025
10.7464/ksct.2025.31.4.254


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  Abstract

Ionic liquids (ILs) have received considerable attention in recent years due to their unique properties, including high solubility, extremely low vapor pressure, broad operational temperature ranges, and structurally tunable characteristics. Notably, certain ILs are capable of breaking azeotropes, thereby enabling the separation of azeotropic mixtures through distillation. In this study, we examine the effect of ILs on shifting the azeotrope of the {ethanol + benzene} using trihexyltetradecylphosphonium chloride ([P666,14][Cl]) and trihexyltetradecylphosphonium bis(2,2,4-trimethylpentyl)phosphinate ([P666,14][TMPP]). Isothermal vapor-liquid equilibrium (VLE) data for the ternary systems {ethanol + benzene + [P666,14][Cl]} and {ethanol + benzene + [P666,14][TMPP]} were measured at 313.15 K using headspace gas chromatography and correlated with the NRTL model. The ILs mole fraction was varied between 0.10 and 0.20. The results provide quantitative insight into the capability of phosphonium-based ILs to alter the azeotropic behavior of the ethanol–benzene system.

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  Cite this article

[IEEE Style]

I. C. Hwang, "Isothermal Vapor-Liquid Equilibrium for Ternary Mixtures of Ethanol, Benzene and Phosphonium-based Ionic Liquids at 313.15 K," Clean Technology, vol. 31, no. 4, pp. 254-259, 2025. DOI: 10.7464/ksct.2025.31.4.254.

[ACM Style]

In Chan Hwang. 2025. Isothermal Vapor-Liquid Equilibrium for Ternary Mixtures of Ethanol, Benzene and Phosphonium-based Ionic Liquids at 313.15 K. Clean Technology, 31, 4, (2025), 254-259. DOI: 10.7464/ksct.2025.31.4.254.

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

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