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Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes

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Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes. / Najdanovic-Visak, Vesna; Rebelo, Luis P. N.; da Ponte, Manuel Nunes.
In: Green Chemistry, Vol. 7, No. 6, 2005, p. 443-450.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Najdanovic-Visak, V, Rebelo, LPN & da Ponte, MN 2005, 'Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes', Green Chemistry, vol. 7, no. 6, pp. 443-450. https://doi.org/10.1039/b500854a

APA

Najdanovic-Visak, V., Rebelo, L. P. N., & da Ponte, M. N. (2005). Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes. Green Chemistry, 7(6), 443-450. https://doi.org/10.1039/b500854a

Vancouver

Najdanovic-Visak V, Rebelo LPN, da Ponte MN. Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes. Green Chemistry. 2005;7(6):443-450. doi: 10.1039/b500854a

Author

Najdanovic-Visak, Vesna ; Rebelo, Luis P. N. ; da Ponte, Manuel Nunes. / Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes. In: Green Chemistry. 2005 ; Vol. 7, No. 6. pp. 443-450.

Bibtex

@article{1eb6395a2dbc42cf8d9575f37dcc3347,
title = "Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes",
abstract = "The liquid-liquid equilibrium of the [C(4)mim][NTf2]-1-butanol system presents upper critical solution temperature (UCST) behaviour. We report the influence of added water as well as the effect of hydrostatic pressure on the cloud points. Similarly to previously studied systems that involved RTILs in our laboratories, water is shown to be a very good co-solvent with alcohols. If a small amount of water is present in the [C(4)mim][NTf2]-1-butanol system it decreases the UCST as much as 1.5 K per mol% of water added to butanol. The hydrostatic pressure effect on cloud points is rather modest (approximate to-3.5 x 10(-3) K bar(-1)). As for liquid-vapour equilibria, a new apparatus which employs a high-pressure variable-volume cell, was conceived and built. The apparatus was tested for the well-known system 1-butanol-CO2. Demixing pressures of the ternary and quaternary mixtures, (1-butanol-water-CO2) and ([C(4)mim][NTf2]-1-butanol-water CO2), were determined for a few compositions and temperatures. The demixing pressure is strongly controlled by the water concentration.",
keywords = "SYSTEMS, ELEVATED PRESSURES, MOLTEN-SALTS, CRITICAL-POINTS, SUPERCRITICAL CARBON-DIOXIDE, 1-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE, CO2, PLUS 1-BUTANOL, THERMODYNAMIC PROPERTIES, TEMPERATURE",
author = "Vesna Najdanovic-Visak and Rebelo, {Luis P. N.} and {da Ponte}, {Manuel Nunes}",
year = "2005",
doi = "10.1039/b500854a",
language = "English",
volume = "7",
pages = "443--450",
journal = "Green Chemistry",
issn = "1463-9262",
publisher = "Royal Society of Chemistry",
number = "6",

}

RIS

TY - JOUR

T1 - Liquid-liquid behaviour of ionic liquid-1-butanol-water and high pressure CO2-induced phase changes

AU - Najdanovic-Visak, Vesna

AU - Rebelo, Luis P. N.

AU - da Ponte, Manuel Nunes

PY - 2005

Y1 - 2005

N2 - The liquid-liquid equilibrium of the [C(4)mim][NTf2]-1-butanol system presents upper critical solution temperature (UCST) behaviour. We report the influence of added water as well as the effect of hydrostatic pressure on the cloud points. Similarly to previously studied systems that involved RTILs in our laboratories, water is shown to be a very good co-solvent with alcohols. If a small amount of water is present in the [C(4)mim][NTf2]-1-butanol system it decreases the UCST as much as 1.5 K per mol% of water added to butanol. The hydrostatic pressure effect on cloud points is rather modest (approximate to-3.5 x 10(-3) K bar(-1)). As for liquid-vapour equilibria, a new apparatus which employs a high-pressure variable-volume cell, was conceived and built. The apparatus was tested for the well-known system 1-butanol-CO2. Demixing pressures of the ternary and quaternary mixtures, (1-butanol-water-CO2) and ([C(4)mim][NTf2]-1-butanol-water CO2), were determined for a few compositions and temperatures. The demixing pressure is strongly controlled by the water concentration.

AB - The liquid-liquid equilibrium of the [C(4)mim][NTf2]-1-butanol system presents upper critical solution temperature (UCST) behaviour. We report the influence of added water as well as the effect of hydrostatic pressure on the cloud points. Similarly to previously studied systems that involved RTILs in our laboratories, water is shown to be a very good co-solvent with alcohols. If a small amount of water is present in the [C(4)mim][NTf2]-1-butanol system it decreases the UCST as much as 1.5 K per mol% of water added to butanol. The hydrostatic pressure effect on cloud points is rather modest (approximate to-3.5 x 10(-3) K bar(-1)). As for liquid-vapour equilibria, a new apparatus which employs a high-pressure variable-volume cell, was conceived and built. The apparatus was tested for the well-known system 1-butanol-CO2. Demixing pressures of the ternary and quaternary mixtures, (1-butanol-water-CO2) and ([C(4)mim][NTf2]-1-butanol-water CO2), were determined for a few compositions and temperatures. The demixing pressure is strongly controlled by the water concentration.

KW - SYSTEMS

KW - ELEVATED PRESSURES

KW - MOLTEN-SALTS

KW - CRITICAL-POINTS

KW - SUPERCRITICAL CARBON-DIOXIDE

KW - 1-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE

KW - CO2

KW - PLUS 1-BUTANOL

KW - THERMODYNAMIC PROPERTIES

KW - TEMPERATURE

U2 - 10.1039/b500854a

DO - 10.1039/b500854a

M3 - Journal article

VL - 7

SP - 443

EP - 450

JO - Green Chemistry

JF - Green Chemistry

SN - 1463-9262

IS - 6

ER -