Patent ID: 6018081
Filing Date: 2000-01-25
Classification: B01J,C07C,C07F

Abstract:
A process for the preparation of a terminal aldehyde by hydroformylation by reacting an ethylenically unsaturated organic compound with carbon monoxide and hydrogen in the presence of a catalyst system comprising iridium or rhodium and a bidentate organic phosphite ligand having the structure: ##STR11## wherein the two phosphorus atoms of the phosphite ligand are linked with a 2,2'-dihydroxyl-1,1'-binapthalene bridging group having the following structure (Q): ##STR12## in which R.sup.1 and R.sup.2 are substituents other than hydrogen and in which R.sup.3 and R.sup.4 are the same or different substituted monovalent aryl groups and/or any one of OR.sup.3 and OR.sup.4 connected to one phosphorus atom forms an --O--R.sup.5 --O-group, where R.sup.5 is a divalent organic group containing one or two aryl groups.