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Supercritical Carbon Dioxide‐Induced Phase Changes in (Ionic Liquid, Water and Ethanol Mixture) Solutions: Application to Biphasic Catalysis.
Author(s) -
NajdanovicVisak Vesna,
Serbanovic Ana,
Esperança José M. S. S.,
Guedes Henrique J. R.,
Rebelo Luís P. N.,
Nunes da Ponte Manuel
Publication year - 2003
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200300663
Subject(s) - supercritical fluid , chemistry , ionic liquid , supercritical carbon dioxide , catalysis , sodium hydroxide , carbon dioxide , phase (matter) , isophorone , ionic bonding , chemical engineering , hydrogen peroxide , ethanol , organic chemistry , ion , engineering
The best of both worlds: Phase changes in ionic liquid + water systems, induced by addition of ethanol and supercritical carbon dioxide, allow reaction cycles to proceed as depicted, combining the high rates of one‐phase conditions with easy separation of products; characteristic of biphasic catalysis. The (usually slow) epoxidation of isophorone by hydrogen peroxide, catalysed by sodium hydroxide, was rapidly carried out in these conditions, with complete recovery of the reaction product by supercritical CO 2 decompression.