Journal ArticleDOI
Activity coefficients at infinite dilution of organic solutes in 1-hexyl-3-methylimidazolium hexafluorophosphate from gas-liquid chromatography
Trevor M. Letcher,and Bathebele Soko,Deresh Ramjugernath,Nirmala Deenadayalu and,Ashley Nevines,Pavan K. Naicker +5 more
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TLDR
In this article, the activity coefficients at infinite dilution for both polar and nonpolar solutes in the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate have been determined by gas−liquid chromatography at the temperatures (298.15, 313.15) K and the selectivity values were calculated from the values obtained over the temperature range.Abstract:
Ionic liquids, with their very low vapor pressures and unique solvent properties, are potentially useful solvents for separating organic liquid mixtures by solvent extraction or by extractive distillation. In this work, the activity coefficients at infinite dilution, , for both polar and nonpolar solutes in the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate have been determined by gas−liquid chromatography at the temperatures (298.15, 313.15, 323.15) K. The partial molar excess enthalpies at infinite dilution and the selectivity values were calculated from the values obtained over the temperature range. The selectivity values have been determined and are used to predict the solvent potential of the ionic liquid for the separation of liquid mixtures by extractive distillation.read more
Citations
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Ionic liquids in heterocyclic synthesis.
TL;DR: Ionic Liquids Presented in This Review 2020 3.1.
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Chromatographic and spectroscopic methods for the determination of solvent properties of room temperature ionic liquids
TL;DR: All evidence points to the ionic liquids as a unique class of polar solvents suitable for technical development, however, further work is needed to fill the gaps in the authors' knowledge of the relationship between ion structures and physicochemical properties.
Journal ArticleDOI
Recent developments in thermodynamics and thermophysics of non-aqueous mixtures containing ionic liquids. A review
TL;DR: A survey of the most recent data material including current developments and aspects of research activities needed in the future is presented in this paper, where the authors present an overview of the main research areas in thermodynamics.
Journal ArticleDOI
Selection of ionic liquids for the extraction of aromatic hydrocarbons from aromatic/aliphatic mixtures
TL;DR: In this article, the authors investigated the separation of toluene from heptane by extraction with ionic liquids and concluded that the ionic liquid [mebupy]BF4 appeared to be the most suitable solvent for this purpose.
Journal ArticleDOI
UNIFAC Model for Ionic Liquids
TL;DR: In this paper, an extension of group parameters of the UNIFAC model to systems with ionic liquids was presented. But the authors only used the activity coefficients of solutes at infinite dilution in ionic liquid at different temperatures.
References
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Journal ArticleDOI
Room temperature ionic liquids as novel media for ‘clean’ liquid–liquid extraction
Jonathan G. Huddleston,Heather D. Willauer,Richard P. Swatloski,Ann E. Visser,Robin D. Rogers +4 more
TL;DR: The partitioning of simple substituted-benzene derivatives between water and the room temperature ionic liquid, butylmethylimidazolium hexafluorophosphate, is based on the solutes' charged state or relative hydrophobicity as discussed by the authors.
Journal ArticleDOI
Characterizing ionic liquids on the basis of multiple solvation interactions.
TL;DR: A linear free energy approach is used to characterize 17 RTILs on the basis of their distinct multiple solvation interactions with probe solute molecules and provides data that can be used to help identify the interactions and properties that are important for specific chemical applications.
Journal ArticleDOI
Measurement of Activity Coefficients at Infinite Dilution in Ionic Liquids Using the Dilutor Technique
TL;DR: In this article, the selectivities at infinite dilution ( = / ) for the separation of aliphatics from aromatics and n-hexane from 1-hexene are presented and discussed.