Ternary LLE measurements for the separation of hex-1-ene/hexane and cyclohexene/cyclohexane compounds with [DCA]-based ionic liquids

Urszula Domańska-Żelazna , Monika Karpińska , Michał Wlazło , Maciej Zawadzki


The objective of this work was to explore the feasibility of separation of hex-1-ene from hexane and cyclohexene from cyclohexane with new ionic liquids (ILs) with [DCA]_ anion. With this aim, the liquid–liquid phase equilibrium (LLE) for three ternary systems of {IL (1) + hex-1-ene (2) + hexane (3)} and two {IL (1) + cyclohexene (2) + cyclohexane (3)} at T = 298.15 K were determined at ambient pressure. Three new ILs have been presented and used in LLE measurements: 3-(2-methoxyethyl)-1-methylimidazolium dicyanamide, [(C2OCH3)MIM][DCA], 1-(4-methoxy-4-oxobutyl)-3-methylimidazolium dicyanamide, [(C3COOMe)MIM][DCA] and choline dicyanamide, [Chol][DCA]. The anion of the ILs was chosen after a literature analysis and measurements of activity coefficient at infinite dilution in many ILs. Chosen ILs revealed large selectivity and very low solute distribution ratio. The results of the chromatography analysis indicated that the ILs used as an entrainers were not detected in the hydrocarbon-rich layer, which is convenient, because eliminates the step needed for the separation of the solvent. The well known NRTL activity coefficient model was used to correlate the LLE data.
Author Urszula Domańska-Żelazna (FC / DPC) - [Thermodynamic Research Unit, School of Chemical Engineering, Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego]
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
- Thermodynamic Research Unit, School of Chemical Engineering
- Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego
, Monika Karpińska (FC / DPC)
Monika Karpińska,,
- Department Of Physical Chemistry
, Michał Wlazło (FC / DPC)
Michał Wlazło,,
- Department Of Physical Chemistry
, Maciej Zawadzki (FC / DPC)
Maciej Zawadzki,,
- Department Of Physical Chemistry
Journal seriesFluid Phase Equilibria, ISSN 0378-3812, (A 30 pkt)
Issue year2018
Publication size in sheets0.5
Keywords in English[DCA]-based ionic liquids; Ternary (liquid-liquid) phase diagrams; Selectivity; Solute distribution ratio; NRTL correlation; Separation
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
URL https://www.sciencedirect.com/science/article/pii/S0378381218300281
Languageen angielski
2018-LLE an-en-[DCA]-FluidPhaseEquilibria.pdf 2.35 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 23-09-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.033; WoS Impact Factor: 2017 = 2.197 (2) - 2017=2.214 (5); Scopus Citations = 5
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