Catalyst systems based on rhodium complexes containing diphosphine ligands and their use in the preparation of aldehydes

摘要

A water-soluble catalyst composition comprising rhodium complexes containing diphosphine ligands, wherein the diphosphine ligands present are compounds of the formula where R1 is selected from the group consisting of carboxylate (COO-), sulfonate (SO3-), phosphonate (PO32-) and 2-amino ethanebisphosphonate [NH-CH2-CH(PO32-)2], R2 is selected from the group consisting of a straight-chain alkylene of 1 to 8 carbon atoms, an oxygen-containing alkylene of 2 to 6 carbon atoms, cycloalkylene of 3 to 10 carbon atoms and a member of the formulae II, III, IV or V a, b, c, d, e, f, g, h, k and l are individually 0 to 1, where at least one of a, b, c, d, e, f, g, h, k or l has to be equal to 1, x(s) are individually 0 or 1, y is an integer of 1 to 24, R3 and R4 are individually selected from the group consisting of alkyl of 4 to 26 carbon atoms, substituted or unsubstituted aryl of 6 to 10 carbon atoms, cycloalkyl of 6 to 10 carbon atoms and benzyl and R3 can also be hydrogen and the use thereof in hydroformylations.