Achievement of a homogeneous phase in ternary ionic liquid/carbon dioxide/organic systems

Maaike C. Kroon; Louw J. Florusse; Eliane Kühne; Geert Jan Witkamp; Cor J. Peters

doi:10.1021/ie901405p

Achievement of a homogeneous phase in ternary ionic liquid/carbon dioxide/organic systems

Maaike C. Kroon, Louw J. Florusse, Eliane Kühne, Geert Jan Witkamp, Cor J. Peters

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A few years ago, it was found that carbon dioxide (CO₂) is able to induce in ternary ionic liquid (IL) + organic systems, a "two-phase (L + V)-three-phase (L₁ + L₂ + V)-two-phase (L₁ + L₂)" transition by pressure increase. In the two liquid phase region (L₁ + L₂), one of the phases did not contain any IL. Therefore, the organic compound could be separated from the IL at increased CO₂ pressure without any IL contamination. However, the occurrence of a homogeneous phase by further pressure increase, a so-called L₁ + L₂ f L transition, in the same systems was never observed before. Here, we demonstrate that in addition a third phase transition is possible upon further CO₂ pressure increase, where the two liquid phases (L ₁ + L₂) can be forced to form one homogeneous liquid phase (L). This phenomenon has promising implications for reactions and separations in systems using ILs.

Original language	English (US)
Pages (from-to)	3474-3478
Number of pages	5
Journal	Industrial and Engineering Chemistry Research
Volume	49
Issue number	7
DOIs	https://doi.org/10.1021/ie901405p
State	Published - Apr 7 2010
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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abstract = "A few years ago, it was found that carbon dioxide (CO2) is able to induce in ternary ionic liquid (IL) + organic systems, a {"}two-phase (L + V)-three-phase (L1 + L2 + V)-two-phase (L1 + L2){"} transition by pressure increase. In the two liquid phase region (L1 + L2), one of the phases did not contain any IL. Therefore, the organic compound could be separated from the IL at increased CO2 pressure without any IL contamination. However, the occurrence of a homogeneous phase by further pressure increase, a so-called L1 + L2 f L transition, in the same systems was never observed before. Here, we demonstrate that in addition a third phase transition is possible upon further CO2 pressure increase, where the two liquid phases (L 1 + L2) can be forced to form one homogeneous liquid phase (L). This phenomenon has promising implications for reactions and separations in systems using ILs.",

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T1 - Achievement of a homogeneous phase in ternary ionic liquid/carbon dioxide/organic systems

AU - Kroon, Maaike C.

AU - Florusse, Louw J.

AU - Kühne, Eliane

AU - Witkamp, Geert Jan

AU - Peters, Cor J.

PY - 2010/4/7

Y1 - 2010/4/7

N2 - A few years ago, it was found that carbon dioxide (CO2) is able to induce in ternary ionic liquid (IL) + organic systems, a "two-phase (L + V)-three-phase (L1 + L2 + V)-two-phase (L1 + L2)" transition by pressure increase. In the two liquid phase region (L1 + L2), one of the phases did not contain any IL. Therefore, the organic compound could be separated from the IL at increased CO2 pressure without any IL contamination. However, the occurrence of a homogeneous phase by further pressure increase, a so-called L1 + L2 f L transition, in the same systems was never observed before. Here, we demonstrate that in addition a third phase transition is possible upon further CO2 pressure increase, where the two liquid phases (L 1 + L2) can be forced to form one homogeneous liquid phase (L). This phenomenon has promising implications for reactions and separations in systems using ILs.

AB - A few years ago, it was found that carbon dioxide (CO2) is able to induce in ternary ionic liquid (IL) + organic systems, a "two-phase (L + V)-three-phase (L1 + L2 + V)-two-phase (L1 + L2)" transition by pressure increase. In the two liquid phase region (L1 + L2), one of the phases did not contain any IL. Therefore, the organic compound could be separated from the IL at increased CO2 pressure without any IL contamination. However, the occurrence of a homogeneous phase by further pressure increase, a so-called L1 + L2 f L transition, in the same systems was never observed before. Here, we demonstrate that in addition a third phase transition is possible upon further CO2 pressure increase, where the two liquid phases (L 1 + L2) can be forced to form one homogeneous liquid phase (L). This phenomenon has promising implications for reactions and separations in systems using ILs.

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JO - Industrial and Engineering Chemistry Research

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Achievement of a homogeneous phase in ternary ionic liquid/carbon dioxide/organic systems

Abstract

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