Phase Equilibrium Investigation on 2-Phenylethanol in Binary and Ternary Systems: Influence of High Pressure on Density and Solid–Liquid Phase Equilibrium

Urszula Domańska-Żelazna , Marek Królikowski , Michał Wlazło , Więckowski Mikołaj


Ionic liquids (ILs) are important new solvents proposed for applications in different separation processes. Herein, an idea of possible use of high pressure in a general strategy of production of 2-phenylethanol (PEA) is discussed. In this work, we present the influence of pressure on the density in binary systems of {1-hexyl-1-methylpyrrolidynium bis{(trifluoromethyl)sulfonyl}imide, [HMPYR][NTf2], or 1-dodecyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [DoMIM][NTf2] + PEA} in a wide range of temperatures (298.15–348.15 K) and pressures (0.1–40 MPa). The densities at ambient and high pressures are measured to present the physicochemical properties of the ILs used in the process of separation of PEA from aqueous phase. The Tait equation was used for the correlation of density of one-component and two-component systems as a function of mole fraction, temperature, and pressure. The influence of pressure is not significant. These systems exhibit mainly negative molar excess volumes, VE. The solid–liquid phase equilibrium (SLE) of [DoMIM][NTf2] in PEA at atmospheric pressure was measured and compared to the SLE high-pressure results. Additionally, the ternary liquid–liquid phase equilibrium (LLE) at ambient pressure in the {[DoMIM][NTf2] (1) + PEA (2) + water (3)} at temperature T = 308.15 K was investigated. The solubility of water in the [DoMIM][NTf2] is quite high in comparison with that measured by us earlier for ILs (x3 = 0.403) at T = 308.15 K, which results in not very successful average selectivity of extraction of PEA from the aqueous phase. The [DoMIM][NTf2] has shown strong interaction with PEA without the immiscibility region. The ternary system revealed Treybal’s type phase equilibrium in which two partially miscible binaries ([DoMIM][NTf2] + water) and (PEA + water) exist. From the results of LLE in the ternary system, the selectivity and the solute distribution ratio of separation of water/PEA were calculated and compared to the results obtained for the ILs measured earlier by us. The popular NRTL model was used to correlate the experimental tie-lines in ternary LLE. These results may help in a new technological project of “in situ” extraction of PEA from aqueous phase during the biosynthesis.
Author Urszula Domańska-Żelazna (FC / DPC) - [Thermodynamic Research Unit, School of Chemical Engineering, Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego]
Urszula Domańska-Żelazna,,
- Department Of Physical Chemistry
- Thermodynamic Research Unit, School of Chemical Engineering
- Instytut Chemii Przemysłowej im. prof. Ignacego Mościckiego
, Marek Królikowski (FC / DPC)
Marek Królikowski,,
- Department Of Physical Chemistry
, Michał Wlazło (FC / DPC)
Michał Wlazło,,
- Department Of Physical Chemistry
, Więckowski Mikołaj (FC / DPC)
Więckowski Mikołaj,,
- Department Of Physical Chemistry
Journal seriesJournal of Physical Chemistry B, ISSN 1520-6106
Issue year2018
Publication size in sheets0.5
ASJC Classification2505 Materials Chemistry; 2508 Surfaces, Coatings and Films; 1606 Physical and Theoretical Chemistry
Project[2014/15/B/ST5/00136 POLON ] Two-phases water-organic process of production of 2-phenylethanol, including the technique of high pressure. Project leader: Domańska-Żelazna Urszula, , start date 22-07-2015, Implemented
WCh Projects financed by NSC [Projekty finansowane przez NCN]
Languageen angielski
acs.jpcb.8b02500.pdf 1.76 MB
Score (nominal)30
Score sourcejournalList
ScoreMinisterial score = 30.0, 26-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.965; WoS Impact Factor: 2018 = 2.923 (2) - 2018=2.996 (5)
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