Ammonium ionic liquids in separation of water/butan-1-ol using liquid-liquid equilibrium diagrams in ternary systems

Urszula Domańska-Żelazna , Michał Wlazło , Zbigniew Dąbrowski , Anna Wiśniewska


In this work ionic liquids (ILs) as a novel popular solvents are proposed for removing butan-1-ol from the aqueous phase. Ternary liquid-liquid phase equilibrium data are presented for mixtures of {ionic liquid, IL (1) + butan-1-ol (2) + water (3)} at T = 328.15 K and pressure 101.3 kPa. The new synthesized by us ammonium-based ILs with long alkane chains, such as dimethyldodecylphenoxyethylammonium bis{(trifluoromethyl)sulfonyl}imide, [N1,1,12,2OPh][NTf2], dimethyldodecylphenoxyethylammonium dicyanamide, [N1,1,12,2OPh][DCA], benzyldimethyldodecylammonium bis{(trifluoromethyl)sulfonyl}imide, [N1,1,12,Bz][NTf2] and benzyldimethyldodecylammonium dicyanamide, [N1,1,12,Bz][DCA] have been tested. The selectivity and the solute distribution ratio of separation water/butan-1-ol were calculated and compared to the literature data. The complete solubility of butan-1-ol in the proposed ILs was observed at T = 328.15 K and pressure 101.3 kPa. The [N1,1,12,Bz][NTf2] is picked out as the most potential candidate as an extractant of butan-1-ol from water. The [N1,1,12,Bz][NTf2] shows only slightly lower selectivity than that observed in few phosphonium-based IL. The experimental tie-lines were successfully correlated with non-random two liquid NRTL model.
Author Urszula Domańska-Żelazna - Instytu Chemii Przemysłowej im. prof. Ignacego Mościckiego, Thermodynamic Research Unit, School of Chemical Engineering
Urszula Domańska-Żelazna,,
, Michał Wlazło (FC / DPC)
Michał Wlazło,,
- Department Of Physical Chemistry
, Zbigniew Dąbrowski
Zbigniew Dąbrowski,,
, Anna Wiśniewska
Anna Wiśniewska,,
Journal seriesFluid Phase Equilibria, ISSN 0378-3812, (A 30 pkt)
Issue year2019
Publication size in sheets0.5
Keywords in EnglishWater/butan-1-ol separationAmmonium-based ionic liquidsLLE in ternary systemsCorrelationSelectivitySolute distribution ratio
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
Languageen angielski
1-s2.0-S0378381218305065-main.pdf 3.76 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 13-08-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.033; WoS Impact Factor: 2017 = 2.197 (2) - 2017=2.214 (5)
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