Separation of 2-phenylethanol from water by liquid–liquid extraction with ionic liquids: new experimental data and modeling with modern thermodynamic tools

Urszula Domańska-Żelazna , Kamil Paduszyński , Marek Królikowski , Agnieszka Wróblewska


In this work, ionic liquids (ILs) are proposed as candidates for extractive removal of 2-phenylethanol (PEA) (well-known rose-like aroma compound) from its aqueous solutions. Four ILs based on different cations, namely, 1-hexyl-1-methylpyrrolidinium, 1-hexyl-1,4-diaza [2.2.2]bicyclooctanium, 1-(2-methoxyethyl)-3-methylimidazolium, and 1-(2-methoxyethyl)-1-methylpyrrolidinium, and bis(trifluoromethylsulfonyl)imide anion were under study. Thermodynamic data at ambient pressure are presented for pure ILs (including temperature-dependent density data and thermal characterization with DSC) as well as for binary systems {IL + water} and ternary systems {IL + PEA + water}. For the binary systems, (liquid + liquid) equilibrium phase diagrams were determined in temperature range T = (280–370) K. For ternary systems, (liquid + liquid) equilibrium was investigated at T = 308.15 K. An impact of the cation structure on the studied properties is established. The data obtained are discussed in terms of the selectivity and distribution ratio of separation of PEA from water. Modeling of the measured properties with two modern chemical engineering thermodynamic tools, namely, nonrandom two liquid (NRTL) model and perturbed-chain statistical associating fluid theory (PC-SAFT), is demonstrated. The NRTL model is applied in a purely correlative fashion in the case of both binary and ternary systems. In turn, the predictive capacity of the PC-SAFT is tested for ternary (liquid + liquid) equilibrium using the combining rules corrections transferred from binary data.
Author Urszula Domańska-Żelazna ZChF
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
, Kamil Paduszyński ZChF
Kamil Paduszyński,,
- Department Of Physical Chemistry
, Marek Królikowski ZChF
Marek Królikowski,,
- Department Of Physical Chemistry
, Agnieszka Wróblewska ZChF
Agnieszka Wróblewska,,
- Department Of Physical Chemistry
Journal seriesIndustrial & Engineering Chemistry Research, ISSN 0888-5885
Issue year2016
Publication size in sheets0.55
Languageen angielski
acs%2Eiecr%2E6b00375_2.pdf 1.43 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.843 (2) - 2016=3.027 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.