Abstract: The catalytic species,water-soluble sulfonated-triphenylphosphine-rhodium complexes have been supported on SiO₂ surface to form heterogenized-homogeneous catalysts denoted supported aque ous phase catalysts (SAPC). The SAPC possesses high catalytic activities even in the presence of excessive phosphine ligand owing to its high surface area. Hydroformylation of methyl 10-undecenoate and 1-hexene are easily carried out in an autoclave or fixed bed reactor over SAPC. With fixed bed reactor,aldehyde selectivities of up to 95% can be achieved in 4.0 MPa of CO/H₂ (1/1, V/V) at 100℃; and the ratios of normal to isomcr aldehyde (n/i) were found to be increased with the increase of P/Rh ratios. It is also found that the reaction rate decreased and the n/i ratios of aldehydes were almost unchanged,when P/Rh ratios were over 15.

Key words: supported catalyst, sulfonated-triphenylphosphine rhodium complex, hydroformylation