Recent advances in catalyst immobilization using supercritical carbon
dioxide
W. Leitner
Institut für Technische Chemie und Makromolekulare
Chemie RWTH-Aachen, Worringer Weg 1, D-52056 Aachen, Germany
Abstract: Homogeneous organometallic catalysts have a great
potential for the development of sustainable synthetic processes. There
is, however, an urgent need for the development of new techniques to
separate products and catalysts efficiently, allowing for recycling
and reuse of the precious catalyst. The unique solvent properties of
supercritical carbon dioxide offer new approaches for the immobilization
of organometallic catalysts, many of which are suitable for efficient
continuous-flow operation. Recent research in this field tries to combine
the molecular nature of organometallic catalysts with the reaction-engineering
aspect of multiphase catalysis.
*Plenary and invited lectures presented at the 12th
International Symposium on Organometallic Chemistry Directed Towards
Organic Synthesis (OMCOS-12), Toronto, Ontario, Canada, 6-10 July 2003.
Other lectures are published in this issue, pp.
453-695.
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