Ionic liquids as entrainers for terpenes fractionation and other relevant separation problems
authors Vilas-Boas, SM; Teixeira, G; Rosini, S; Martins, MAR; Gaschi, PS; Coutinho, JAP; Ferreira, O; Pinho, SP
nationality International
journal JOURNAL OF MOLECULAR LIQUIDS
author keywords Ionic liquid; Activity coefficient at infinite dilution; Deterpenation; Desulfurization; COSMO-RS
keywords DILUTION ACTIVITY-COEFFICIENTS; CITRUS ESSENTIAL OIL; EXTRACTION PHASE-EQUILIBRIUM; INFINITE DILUTION; COSMO-RS; ORGANIC-COMPOUNDS; SOLVENT-EXTRACTION; MODEL SYSTEMS; THERMODYNAMIC PROPERTIES; PARTITION-COEFFICIENTS
abstract This work discusses the potential of two phosphonium-based ionic liquids (ILs), [P-6,P-6,P-6,P-14]Cl and [P-6,P-6,P-6,P-14][(C8H17)(2)PO2], and one methylimidazolium-based IL, [C(4)rnim][OAc], as entrainers in the fractionation of terpene mixtures, in the desulfurization and denitrification of fuel oils, and in the separation of aromatics from aliphatic hydrocarbons. To this aim, the activity coefficients at infinite dilution of 45 solutes were obtained by gas-chromatography in the temperature range (333.15-458.15) K. Selectivities and capacities were calculated showing that [P-6.6.6,P-14]Cl is adequate for the fractionation of (-)-menthone/L-(-)-menthol mixture, being also a suitable option for the deterpenation of citrus essential oil, and the removal of thiophene and pyridine from aliphatic hydrocarbons. To complement the experimental measurements COSMO-RS model was tested, demonstrating good potential to screen separation agents and give insights for several important separation problems, including the removal of contaminants from fuels and the isolation, fractionation and purification of terpenes mixtures. (C) 2020 Elsevier B.V. All rights reserved.
publisher ELSEVIER
issn 0167-7322
isbn 1873-3166
year published 2021
volume 323
digital object identifier (doi) 10.1016/j.molliq.2020.114647
web of science category 11
subject category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
unique article identifier WOS:000610844800025
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journal impact factor 5.065
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