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| - Evaluation of Catalyst Support Effects during Rhodium-CatalyzedHydroformylation in Supercritical CO2
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| - Hydroformylation chemistry is commercially practiced for the production of aldehyde compounds,which are used as precursors to surfactants and plasticizers. Current technology using theaqueous-phase process is limited by the low solubility of the olefin in water. New techniquesusing supercritical fluid solvents are in development but rely on the modification of ahomogeneous catalyst to increase its solubility in supercritical carbon dioxide (scCO2). Analternative approach for the use of scCO2 is to use the solvent only as a means of bringing allof the reactants into a single fluid phase, combined with a heterogeneous catalyst. The currentpaper reports on the development of a heterogeneous catalyst for hydroformylation in scCO2,wherein the solid catalyst has been specifically designed to take advantage of the uniqueproperties of this benign solvent. We demonstrate that catalyst tailoring can be achieved bypromoting specific fluid−solid interactions that impact the rate of the reaction. This developmentmay allow us to develop new heterogeneous catalysts that further target the fluid−solidinteractions to control issues of selectivity and leaching that have been problematical in thedevelopment of commercially viable heterogeneous catalysts for the hydroformylation reaction.
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