Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane

V. Najdanovic-Visak, A. Rodriguez, Z.P. Visak, J.N. Rosa, C.A.M. Afonso, M. Nunes da Ponte, L.P.N. Rebelo

Research output: Contribution to journalArticle

Abstract

Several regimes of the (T, x1, x2) surface of the liquid–liquid phase diagram at or close to a nominal pressure of 0.1 MPa of the ternary systems 1-hydroxyethyl-3-methylimidazolium based ionic liquids (1), [C2OHmim][X] ([X] = [PF6]− or [BF4]− or [CF3SO3]− or [(CF3SO2)2N]−), +dichloromethane or 1,2-dichloroethane (2), +2-propanol (3) were investigated. For the first time, phase splitting in a (IL + dichloromethane) system was found and the related temperature–composition phase diagrams for all aforementioned ILs were determined. In the case of 2-propanol, partial miscibility was observed only for ILs containing the [PF6]− and [BF4]− anions. When the latter are involved in ternary systems, the ternary phase diagrams at ambient conditions show wide areas of total miscibility, thus revealing an unexpected and large co-solvent effect. For the ternary mixture ([C2OHmim][PF6] + dichloromethane + 2-propanol), a moderate pressure effect on the cloud point with a negative pressure–temperature slope was detected.
Original languageEnglish
Pages (from-to)35-41
JournalFluid Phase Equilibria
Volume254
Issue number1-2
DOIs
Publication statusPublished - 15 Jun 2007

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Ionic Liquids
2-Propanol
Methylene Chloride
Dichloromethane
Propanol
Ionic liquids
Phase diagrams
phase diagrams
Ternary systems
ternary systems
solubility
liquids
Solubility
Pressure effects
pressure effects
Anions
Negative ions
slopes
anions
ethylene dichloride

Cite this

Najdanovic-Visak, V. ; Rodriguez, A. ; Visak, Z.P. ; Rosa, J.N. ; Afonso, C.A.M. ; Nunes da Ponte, M. ; Rebelo, L.P.N. / Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane. In: Fluid Phase Equilibria. 2007 ; Vol. 254, No. 1-2. pp. 35-41.
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abstract = "Several regimes of the (T, x1, x2) surface of the liquid–liquid phase diagram at or close to a nominal pressure of 0.1 MPa of the ternary systems 1-hydroxyethyl-3-methylimidazolium based ionic liquids (1), [C2OHmim][X] ([X] = [PF6]− or [BF4]− or [CF3SO3]− or [(CF3SO2)2N]−), +dichloromethane or 1,2-dichloroethane (2), +2-propanol (3) were investigated. For the first time, phase splitting in a (IL + dichloromethane) system was found and the related temperature–composition phase diagrams for all aforementioned ILs were determined. In the case of 2-propanol, partial miscibility was observed only for ILs containing the [PF6]− and [BF4]− anions. When the latter are involved in ternary systems, the ternary phase diagrams at ambient conditions show wide areas of total miscibility, thus revealing an unexpected and large co-solvent effect. For the ternary mixture ([C2OHmim][PF6] + dichloromethane + 2-propanol), a moderate pressure effect on the cloud point with a negative pressure–temperature slope was detected.",
author = "V. Najdanovic-Visak and A. Rodriguez and Z.P. Visak and J.N. Rosa and C.A.M. Afonso and {Nunes da Ponte}, M. and L.P.N. Rebelo",
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Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane. / Najdanovic-Visak, V.; Rodriguez, A.; Visak, Z.P.; Rosa, J.N.; Afonso, C.A.M.; Nunes da Ponte, M.; Rebelo, L.P.N.

In: Fluid Phase Equilibria, Vol. 254, No. 1-2, 15.06.2007, p. 35-41.

Research output: Contribution to journalArticle

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T1 - Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane

AU - Najdanovic-Visak, V.

AU - Rodriguez, A.

AU - Visak, Z.P.

AU - Rosa, J.N.

AU - Afonso, C.A.M.

AU - Nunes da Ponte, M.

AU - Rebelo, L.P.N.

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AB - Several regimes of the (T, x1, x2) surface of the liquid–liquid phase diagram at or close to a nominal pressure of 0.1 MPa of the ternary systems 1-hydroxyethyl-3-methylimidazolium based ionic liquids (1), [C2OHmim][X] ([X] = [PF6]− or [BF4]− or [CF3SO3]− or [(CF3SO2)2N]−), +dichloromethane or 1,2-dichloroethane (2), +2-propanol (3) were investigated. For the first time, phase splitting in a (IL + dichloromethane) system was found and the related temperature–composition phase diagrams for all aforementioned ILs were determined. In the case of 2-propanol, partial miscibility was observed only for ILs containing the [PF6]− and [BF4]− anions. When the latter are involved in ternary systems, the ternary phase diagrams at ambient conditions show wide areas of total miscibility, thus revealing an unexpected and large co-solvent effect. For the ternary mixture ([C2OHmim][PF6] + dichloromethane + 2-propanol), a moderate pressure effect on the cloud point with a negative pressure–temperature slope was detected.

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