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Acta Chimica Slovaca

The Journal of Slovak University of Technology in Bratislava

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1337-978X
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Use of ionic liquids in extraction

Pavol Steltenpohl
  • Corresponding author
  • Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Elena Graczová
  • Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-12-20 | DOI: https://doi.org/10.2478/acs-2014-0022

Abstract

In order to separate liquid mixtures, common distillation is not always suitable, especially if relative volatility of the mixture components is close to or equals unity, thus avoiding separation based on the vapor enrichment by more volatile component. To overcome this limitation of distillation, several alternatives were suggested including pressure swing and extraction distillation. Another, principally different, separation method used for the liquid mixtures separation is liquid-liquid extraction. Separation efficiency of this method is closely related to the basic extraction solvent characteristics, capacity and selectivity. In order to minimize costs connected with extraction, new extraction solvents are developed, among which ionic liquids show high potential due to their tunable properties. Here, efficiency of traditional extraction solvent, benzene, was compared to that of tetradecyltrihexylphosphonium bis(trifluoromethylsulfonyl)imide ionic liquid in separation of ethanol from its aqueous solution. The comparison was assessed on the base of results of a counter-current extractor simulation. Further, some economic aspects of this separation procedure were discussed. Optimum consumption of extraction solvent was identified taking into account alcohol-to-water molar (mass) ratio in the final extract as optimization criterion.

Keywords: ionic liquids; azeotropic mixture separation; equipment simulation; counter-current extractor; product purity

References

  • Boddey RM, Soares LHB, Alves BJR, Urquiaga S (2008) In: Pimentel D (Ed) Biofuels, solar and wind as renewable energy systems: Benefits and risks (pp. 321-356). Springer, Dordrecht, DOI: 10.1007/978-1-4020-8654-0_13.CrossrefGoogle Scholar

  • Meindersma GW, de Haan AB (2008) Chemical Engineering Research and Design 86: 745-752. DOI: 10.1016/j.cherd.2008.02.016.CrossrefGoogle Scholar

  • Meindersma GW, Hansmeier AR, de Haan AB (2010) Industrial & Engineering Chemistry Research 49: 7530-7540. DOI: 10.1021/ie100703p.CrossrefGoogle Scholar

  • Neves CMSS, Granjo JFO, Freire MG, Robertson A, Oliveira NMC, Coutinho JAP (2011) Green Chemistry 13: 1517-1526. DOI: 10.1039/c1gc15079k.CrossrefGoogle Scholar

  • Renon H, Prausnitz JM (1968) AIChE Journal 14: 135-144. DOI: 10.1002/aic.690140124.CrossrefGoogle Scholar

  • Sørensen JM, Arlt W (1980) Liquid-liquid equilibrium data collection: Ternary systems (Vol. V, Part 2, pp. 352). DECHEMA, Frankfurt/Main.Google Scholar

  • Steltenpohl P, Graczová E (2014) Chemical Engineering Transactions 39: 187-192. DOI: 10.3303/ cet1439032CrossrefGoogle Scholar

About the article

Published Online: 2014-12-20

Published in Print: 2014-10-01


Citation Information: Acta Chimica Slovaca, ISSN (Online) 1337-978X, DOI: https://doi.org/10.2478/acs-2014-0022.

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© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava . This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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