A 1-alkylcyanopyridinium-based ionic liquid in the separation processes

Michał Wlazło , Monika Karpińska , Urszula Domańska-Żelazna

Abstract

The activity coefficients at infinite dilution, View the MathML source for 65 solutes, including wide spectra of alkanes, alkenes and alkynes as well as aromatic hydrocarbons, alcohols, water, ethers, ketones, acetonitrile, pyridine, 1-nitropropane, thiophene, and esters in the 1-butyl-4-cyanopyridinium bis{(trifluoromethyl)sulfonyl}imide [BCN4Py][NTf2] were determined by gas–liquid chromatography for all solutes at seven temperatures in range of (308.15 to 368.15) K. The gas–liquid partition coefficients, KL at infinite dilution and the fundamental thermodynamic functions, the partial molar excess Gibbs energy, View the MathML source, enthalpy View the MathML source, and entropy term View the MathML source were calculated. The values of selectivity and capacity for four separation problems as hexane/hex-1-ene, hexane/benzene, cyclohexane/cyclohexene and ethylobenzene-styrene were calculated from View the MathML source and compared to literature values for bis{(trifluoromethyl)sulfonyl}imide-based ionic liquids (ILs) for the same separation problems. In comparison with the former measured ILs, the [BCN4Py][NTf2] present quite high selectivity for the chosen separation problems, and an average capacity for hex-1-ene, benzene, cyclohexene and styrene. The data presented here shows that [BCN4Py][NTf2] may be proposed as an alternative solvent for the chosen separation problems in new technological projects.
Author Michał Wlazło ZChF
Michał Wlazło,,
- Department Of Physical Chemistry
, Monika Karpińska ZChF
Monika Karpińska,,
- Department Of Physical Chemistry
, Urszula Domańska-Żelazna ZChF
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
Journal seriesJournal of Chemical Thermodynamics, ISSN 0021-9614
Issue year2016
Vol97
Pages253-260
Publication size in sheets0.5
Keywords in EnglishIonic liquid; [BCN4Py][NTf2]; Experimental activity coefficients at infinite dilution; Thermodynamics; Separation
DOIDOI:10.1016/j.jct.2016.01.017
URL http://www.sciencedirect.com/science/article/pii/S0021961416000343
Languageen angielski
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Score (nominal)35
ScoreMinisterial score = 30.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.726 (2) - 2016=2.784 (5)
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