Multiphase equilibrium in mixtures of [C4mim] [PF6] with supercritical carbon dioxide, water, and ethanol: Applications in catalysis

V. Najdanovic-Visak, A. Serbanovic, J.M.S.S. Esperança, H.J.R. Guedes, L.P.N. Rebelo, M. Nunes Da Ponte

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.
Original languageEnglish
Title of host publicationACS Symposium Series
PublisherAmerican Chemical Society
Pages301-310
ISBN (Print)978-084123893-0
Publication statusPublished - 2005

Publication series

NameACS Symposium Series
PublisherACS
Volume901
ISSN (Print)0097-6156

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    Najdanovic-Visak, V., Serbanovic, A., Esperança, J. M. S. S., Guedes, H. J. R., Rebelo, L. P. N., & Nunes Da Ponte, M. (2005). Multiphase equilibrium in mixtures of [C4mim] [PF6] with supercritical carbon dioxide, water, and ethanol: Applications in catalysis. In ACS Symposium Series (pp. 301-310). (ACS Symposium Series; Vol. 901). American Chemical Society.