Phase equilibria study of (ionic liquid + water) binary mixtures

Marta Królikowska , Monika Karpińska , Maciej Zawadzki


The (solid + liquid) and (liquid + liquid) phase equilibria for 10 (ionic liquid + water) binary mixtures have been determined by a dynamic method at a wide temperature range at atmospheric pressure. The mutual immiscibility with an upper critical solution temperature (UCST) for the binary systems {4-(2-methoxyethyl)-4-methylmorpholinium trifluorotris(perfluoroethyl)phosphate, or 4-(2-methoxyethyl)-4-methylmorpholinium bis(trifluoromethylsulfonyl)imide, or 1-(2-methoxyethyl)-1-methylpiperidinium trifluorotris(perfluoroethyl)phosphate, or 1-(2-methoxy-ethyl)-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide, or 1-(2-methoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, or 4-(2-methoxyethyl)-4-methylpyrrolidinium trifluorotris(perfluoroethyl)phosphate (1) + water (2)} were detected. Complete miscibility in the liquid phase, over the whole range of ionic liquid mole fraction, was observed for the binary mixtures containing: 1-butyl-1-methylpiperidinium dicyanamide, or 1-butyl-1-methylpyrrolidinium dicyanamide, or 1-butyl-4-methylpyridinium dicyanamide, or 1-butyl-4-methylpyridinium thiocyanate. For the tested binary systems with immiscibility gap the parameters of the LLE correlation have been derived using the NRTL equation. The (solid + liquid) phase equilibria have been correlated by means of NRTL, UNIQUAC and Wilson equations and compared to the literature data for different ionic liquids. The influence of the ionic liquid structure on water solubility was discussed.
Author Marta Królikowska (FC / DPC)
Marta Królikowska,,
- Department Of Physical Chemistry
, Monika Karpińska (FC / DPC)
Monika Karpińska,,
- Department Of Physical Chemistry
, Maciej Zawadzki (FC / DPC)
Maciej Zawadzki,,
- Department Of Physical Chemistry
Journal seriesFluid Phase Equilibria, ISSN 0378-3812
Issue year2013
Publication size in sheets0.5
Keywords in EnglishIonic liquid, SLE, LLE, Phase diagram, NRTL equation
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
Languageen angielski
1-s2.0-S0378381213002872-main.pdf 810.48 KB
Score (nominal)30
Score sourcejournalList
ScoreMinisterial score = 30.0, 23-12-2019, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 23-12-2019, ArticleFromJournal
Publication indicators Scopus Citations = 29; WoS Citations = 28; GS Citations = 12.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.277; WoS Impact Factor: 2013 = 2.241 (2) - 2013=2.244 (5)
Citation count*12 (2015-03-08)
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