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4 results on '"1-Alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids"'

1. Isobutane as a probe of the structure of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids.

Author

Pison, Laure, Bernales, Varinia, Fuentealba, Patricio, Padua, Agilio A.H., and Costa Gomes, Margarida F.

Subjects
*ISOBUTANE, *CHEMICAL structure, *IMIDAZOLES, *IONIC liquids, *THERMODYNAMICS, *SOLVATION
Abstract

An experimental study of the solubility and of the thermodynamic properties of solvation, between temperatures (303 and 343) K and at pressures close to atmospheric, of 2-methylpropane (isobutane) in several ionic liquids based on the bis(trifluoromethylsulfonyl)imide anion and on 1-alkyl-3-methylimidazolium cations, [C n C 1 Im][NTf 2 ], with alkyl side-chains varying from two to ten carbon atoms is presented. The isobutane solubility increases with increasing size of the alkyl side-chain of the cation in the ionic liquid and decreases with increasing temperature (as typical of an exothermal dissolution process). The mole fraction solubility of isobutane varies from 0.904 · 10 −2 in [C 2 C 1 Im][NTf 2 ] at T = 343 K to 1.002 · 10 −1 in [C 10 C 1 Im][NTf 2 ] at T = 303 K. The values measured in this work are compared to the behaviour of n-butane in the same ionic liquids published in a previous study (Costa Gomes et al. , 2012). Isobutane was found to be significantly less soluble than n-butane in all the ionic liquids. The differences found are interpreted in relation to the molecular structures obtained by molecular dynamics simulations for the solutions of n-butane and isobutane in the studied [C n C 1 Im][NTf 2 ] ionic liquids. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Liquid–liquid equilibria of binary systems {benzene+[x-Mim][NTf2] ionic liquid}: Experimental data and thermodynamic modeling using a group contribution equation of state.

Author

González, Emilio J., Bottini, Susana B., Pereda, Selva, and Macedo, Eugénia. A.

Subjects
*LIQUID-liquid equilibrium, *BINARY number system, *IONIC liquids, *DATA analysis, *FLUIDS, *MATHEMATICAL models of thermodynamics, *EQUATIONS of state
Abstract

Highlights: [•] Mutual solubilities of binary mixtures {benzene+ionic liquid} were measured. [•] The experimental LLE data were modeled using the GC-EoS equation. [•] The GC-EOS was applied to predict LLE and VLE of {benzene+[x-Mim][NTf2]} mixtures. [•] The GC-EOS was used to predict LLE of {hexane+benzene+[x-Mim][NTf2]} mixtures. [•] GC-EOS is capable of predicting the phase behavior of these mixtures. [ABSTRACT FROM AUTHOR]

Published
2014
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3. Isobutane as a probe of the structure of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids

Author

Laure Pison, Patricio Fuentealba, Varinia Bernales, Margarida F. Costa Gomes, Agilio A. H. Padua, Institut de Chimie de Clermont-Ferrand (ICCF), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Departamento de Fisica [USACH Santiago], and Universidad de Santiago de Chile [Santiago] (USACH)

Subjects
Inorganic chemistry, 02 engineering and technology, Gas solubility, 010402 general chemistry, Mole fraction, 01 natural sciences, chemistry.chemical_compound, Methylpropane, [CHIM]Chemical Sciences, General Materials Science, Physical and Theoretical Chemistry, Solubility, Imide, Dissolution, Alkyl, chemistry.chemical_classification, Isobutane, Solvation, 021001 nanoscience & nanotechnology, 1-Alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, chemistry, Ionic liquid, Physical chemistry, 0210 nano-technology
Abstract

An experimental study of the solubility and of the thermodynamic properties of solvation, between temperatures (303 and 343) K and at pressures close to atmospheric, of 2-methylpropane (isobutane) in several ionic liquids based on the bis(trifluoromethylsulfonyl)imide anion and on 1-alkyl-3-methylimidazolium cations, [C n C 1 Im][NTf 2 ], with alkyl side-chains varying from two to ten carbon atoms is presented. The isobutane solubility increases with increasing size of the alkyl side-chain of the cation in the ionic liquid and decreases with increasing temperature (as typical of an exothermal dissolution process). The mole fraction solubility of isobutane varies from 0.904 · 10 −2 in [C 2 C 1 Im][NTf 2 ] at T = 343 K to 1.002 · 10 −1 in [C 10 C 1 Im][NTf 2 ] at T = 303 K. The values measured in this work are compared to the behaviour of n-butane in the same ionic liquids published in a previous study (Costa Gomes et al. , 2012). Isobutane was found to be significantly less soluble than n-butane in all the ionic liquids. The differences found are interpreted in relation to the molecular structures obtained by molecular dynamics simulations for the solutions of n-butane and isobutane in the studied [C n C 1 Im][NTf 2 ] ionic liquids.

Published
2015
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4. Liquid-liquid equilibria of binary systems {benzene+[x-Mim][NTf2] ionic liquid}: Experimental data and thermodynamic modeling using a group contribution equation of state

Author

Selva Pereda, Susana B. Bottini, Emilio J. González, Eugénia A. Macedo, and Faculdade de Engenharia

Subjects
Equation of state, LLE and VLE, group contribution eqcuation of state, Chemistry, General Chemical Engineering, General Physics and Astronomy, Thermodynamics, Binary number, 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids, INGENIERÍAS Y TECNOLOGÍAS, Engineering and technology, Technological sciences, Engineering and technology, Ingeniería Química, chemistry.chemical_compound, benzene, Group (periodic table), Ciências Tecnológicas, Ciências da engenharia e tecnologias, Ionic liquid, Otras Ingeniería Química, Ciências da engenharia e tecnologias, Organic chemistry, Liquid liquid, Physical and Theoretical Chemistry, Benzene
Abstract

Liquid–liquid equilibrium (LLE) data for binary mixtures {benzene (1) + ionic liquid (2)} were measured at atmospheric pressure from 293.15K to 333.15K. The ionic liquids (ILs) studied were 1-ethyl- and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, ([EMim][NTf2] and [HMim][NTf2]). Furthermore, the group contribution equation of state (GC-EoS) was applied to model the phase behavior of mixtures of hydrocarbons with different members of the homologous family 1-alkyl-3- methylimidazolium bis(trifluoromethylsulfonyl)imide, [x-Mim][NTf2]. New pure group parameters for the ionic liquid functional group (MimNTf2) and interaction parameters between this group and the paraffin (CH3, CH2) and aromatic (ACH) groups are reported. The GC-EOS extended with the new parameters was applied to predict LLE and VLE of binary mixtures {benzene + x-MimNTf2} and LLE of ternary systems {n-hexane + benzene + [x-Mim][NTf2]}. The results show thatthe GC-EOS is capable of predicting the phase behavior of this kind of mixtures with reasonable accuracy. Fil: González, Emilio J.. Universidad de Oporto. Facultad de Ingeniería. Laboratorio de Separación e Ingeniería de Reacción; Portugal Fil: Bottini, Susana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Pereda, Selva. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Macedo, Eugenia A.. Universidad de Oporto. Facultad de Ingeniería. Laboratorio de Separación e Ingeniería de Reacción; Portugal

Published
2014

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