Co-solvent effects in LLE of 1 -hydroxyethyl -3 -methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane
In: Fluid phase equilibria, Jg. 254 (2007), Heft 1-2, S. 35-41
academicJournal
- print, 29 ref
Zugriff:
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 l-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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Co-solvent effects in LLE of 1 -hydroxyethyl -3 -methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane
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Autor/in / Beteiligte Person: | NAJDANOVIC-VISAK, Vesna ; RODRIGUEZ, Ana ; VISAK, Zoran P ; ROSA, Joao N ; AFONSO, Carlos A. M ; NUNES DA PONTE, Manuel ; REBELO, Luis Paulo N |
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Zeitschrift: | Fluid phase equilibria, Jg. 254 (2007), Heft 1-2, S. 35-41 |
Veröffentlichung: | Amsterdam: Elsevier Science, 2007 |
Medientyp: | academicJournal |
Umfang: | print, 29 ref |
ISSN: | 0378-3812 (print) |
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