Process for the preparation of aldehydes employing catalyst compositions based on rhodium complexes containing diphosphine ligands

摘要

A process for preparing aldehydes by hydroformylating olefinically unsaturated compounds in the presence of a water-insoluble catalyst composition comprising rhodium complexes containing diphosphine ligands, wherein the diphosphine ligands present are compounds of the formula (I) ##STR1## wherein R.sup.1 is selected from the group consisting of carboxylate (COO.sup.-), sulfonate (SO.sub.3.sup.-), phosphonate (PO.sub. 3.sup.2-) and 2-anmino ethtanebisphosphonate, R.sup. 2 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 ##STR2##