The Ethylbenzene/Styrene Preferential Separation with Ionic Liquids in Liquid–Liquid Extraction

Monika Karpińska , Michał Wlazło , Urszula Domańska-Żelazna

Abstract

The objective of this work was to explore the feasibility of using ionic liquids (ILs), namely N-ethyl-N-methylmorpholinium dicyanamide, [EMMor][DCA], (3-hydroxypropyl)-1-methylmorpholinium dicyanamide, [N-C3OHMMor][DCA], 1-(3-hydroxypropyl)-3-methylimidazolium dicyanamide, [N-C3OHMIM][DCA], 1-(3-hydroxypropyl)pyridinium dicyanamide, [N-C3OHPy][DCA], (3-cyanopropyl)pyridinium dicyanamide, [N-C3CNPy][DCA], and (3-cyanopropyl)methylpyrrolidinium dicyanamide, [N-C3CNMPyr][DCA] for the separation of ethylbenzene and styrene. The liquid–liquid equilibrium (LLE) data in ternary systems of {IL (1) + styrene (2) + ethylbenzene (3)} at T = 298.15 K and ambient pressure is presented for the six ILs synthesized by us. The final chromatography analysis of the composition of tie-lines has shown that the studied ILs are not found in the raffinate phase and they show interesting results on the selectivity and solute distribution ratio for styrene extraction. A comparison of different ILs is presented for the studied separation problem. It was observed that the best separation selectivities were found for [N-C3CNPy][DCA] (SAv = 2.38) and [N-C3OHMMor][DCA] (SAv = 2.42) in comparison with other studied ILs in this work and those presented in the literature. While the data presented here are useful from a theoretical standpoint, the possibility of applications for these ILs in technological processes is questionable because of low solute distribution ratios, especially those calculated from the masses [N-C3CNPy][DCA] (βMAv = 0.08) and [N-C3OHMMor][DCA] (βMAv = 0.07). The experimental tie-lines were correlated with the non-random two liquid NRTL model.
Author Monika Karpińska (FC / DPC)
Monika Karpińska,,
- Department Of Physical Chemistry
, Michał Wlazło (FC / DPC)
Michał Wlazło,,
- Department Of Physical Chemistry
, Urszula Domańska-Żelazna (FC / DPC)
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
Journal seriesJournal of Solution Chemistry, ISSN 0095-9782, (A 15 pkt)
Issue year2018
Pages1-19
Publication size in sheets0.9
Keywords in EnglishIonic liquids Separation ethylbenzene/styrene Ternary (liquid–liquid) phase diagrams Selectivity Solute distribution ratio NRTL correlation
DOIDOI:10.1007/s10953-018-0755-7
URL https://link.springer.com/article/10.1007/s10953-018-0755-7#citeas
Languageen angielski
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Karpińska2018_Article_TheEthylbenzeneStyrenePreferen.pdf 1.76 MB
Score (nominal)20
Publication indicators WoS Impact Factor: 2006 = 1.026 (2) - 2007=1.212 (5)
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