N. A. D. Munck, M. Verbruggen, J. D. Leur
May 1, 1981
Citations
0
Influential Citations
22
Citations
Journal
Journal of Molecular Catalysis
Abstract
Abstract Hydridocarbonyltris(triphenylphosphine)rhodium(I), chemically anchored via phosphine or phosphonite ligands to the surface of macroreticular polystyrene divinylbenzene, is successfully applied in the heterogeneous gas phase hydroformylation of propylene at 90 °C and 0.1 MPa total pressure. Catalysts prepared via chlorophosphonation are stable; at a conversion of 0.9% no deactivation is observed over a period of more than 500h. Catalysts prepared via chloromethylation deactivate slightly, but have a higher selectivity for n-butyraldehyde than those prepared via chlorophosphonation. The hydroformylation activity per unit weight of rhodium, for catalysts with anchored diphenylphosphines prepared via chlorophosphonation, decreases with increasing phosphorus ligand coverage. Addition of a small amount of triphenylphosphine to catalyst with chemically anchored ligands raises the selectivity for n-butyraldehyde formation. The influence of the type of anchored ligand on the catalytic performance will be discussed.