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Multiphase equilibrium in mixtures of [C(4)mim][PF6] with supercritical carbon dioxide, water, and ethanol: Applications in catalysis

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Publication date2005
Host publicationIonic liquids III : fundamentals, progress, challenges, and opportunities
EditorsRobin D. Rogers, Kenneth R. Seddon
Place of PublicationWashington, D.C.
PublisherAmerican Chemical Society
Pages301-310
Number of pages10
ISBN (Print)0-8412-3893-6
<mark>Original language</mark>English
EventSymposium on Ionic Liquids - Fundamentals, Progress, Challenges and Opportunities held at the 226th American-Chemical-Society National Meeting - New York

Conference

ConferenceSymposium on Ionic Liquids - Fundamentals, Progress, Challenges and Opportunities held at the 226th American-Chemical-Society National Meeting
CityNew York
Period7/09/0311/09/03

Publication series

NameACS Symposium Series
PublisherAmerican Chemical Society
Volume901
ISSN (Print)0097-6156

Conference

ConferenceSymposium on Ionic Liquids - Fundamentals, Progress, Challenges and Opportunities held at the 226th American-Chemical-Society National Meeting
CityNew York
Period7/09/0311/09/03

Abstract

The ionic liquid [C(4)mim][PF6] and supercritical carbon dioxide produce multiphase systems when mixed with ethanol and water. Mixtures of these four solvents can be made to go, by small changes in composition, through a succession of phase changes, involving one, two and three-phase situations. Increasing carbon dioxide pressure induces first the appearance of an intermediate liquid phase and later the merging of this phase with the gas, leaving all the ionic liquid in a separate, denser liquid. This succession is suitable to carry out reaction cycles in ionic liquid-based solvents, with complete recovery of the reaction product by CO2 decompression.