The kinetics of the hydroformylation of butene-1 over a rhodiumsupported liquid-phase catalyst (Rh-SLPC) was studied in a flow reactor, at a total pressure of 1.2 MPa. The partial pressures of CO, H2and butene-1 varied between 0.1 and 0.6 MPa, whereas the reaction temperature changed from 333 to 373 K. At very low pore filling ('monolayer catalysts') a considerable change in the reaction order of butene-1 from 1.3 to 0.5-0.8 was observed. Possible side reactions have been studied. Butene-1 hydrogenation was stimulated by lowering the reaction temperature and the CO partial pressure, isomerization of butene-1 could be largely avoided by choosing a temperature below 370 K and aldol condensation was minimized if non-acidic supports were used. IR and31P NMR studies of the various rhodium complexes present in rhodium-SLP catalysts have been performed. © 1985.
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