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

Najdanovic-Visak, Vesna and Rodriguez, Ana and Visak, Zoran P. and Rosa, Joao N. and Afonso, Carlos A. M. and Nunes da Ponte, Manuel and Rebelo, Luis Paulo N. (2007) Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids plus 2-propanol plus dichloromethane or 1,2-dichloroethane. Fluid Phase Equilibria, 254 (1-2). pp. 35-41. ISSN 0378-3812

Full text not available from this repository.

Abstract

Several regimes of the (T, x(1), x(2)) 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), [C(2)OHmim][X] ([X] = [PF6](-) or [BF4](-) or [CF3SO3](-) or [(CF3SO2)(2)N](-)), +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 ([C-2 OHmim] [PF6] + dichloromethane + 2-propanol), a moderate pressure effect on the cloud point with a negative pressure-temperature slope was detected. (c) 2007 Elsevier B.V. All rights reserved.

Item Type:
Journal Article
Journal or Publication Title:
Fluid Phase Equilibria
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1606
Subjects:
ID Code:
63056
Deposited By:
Deposited On:
22 Mar 2013 09:43
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:21