Patent ID: 6127582
Filing Date: 2000-10-03
Classification: C07C

Abstract:
A process for the hydroformylation of ethylenically unsaturated compounds with carbon monoxide and hydrogen in the presence of a catalyst system comprisinga) a source of platinum group metal cations;b) a source of non-halide anions;c) a source of at least one bidentate ligand of the formulaR.sup.1 R.sup.2 M.sup.1 RM.sup.2 R.sup.3 R.sup.4 (I)wherein M.sup.1 and M.sup.2 independently represent a phosphorus, arsenic or antimony atom, R represents a bivalent bridging group containing from 1-4 carbon atoms in the bridge, R.sup.1 and R.sup.2 together represent a bivalent substituted or unsubstituted cyclic group whereby the two free valencies are linked to M.sup.1, and R.sup.3 and R.sup.4 independently represent a substituted or unsubstituted hydrocarbyl group, or together represent a bivalent substituted or unsubstituted cyclic group whereby the two free valencies are linked to M.sup.2 ; andd) a source of halide anions chosen from the group of chloride, iodide and bromide and mixtures thereof;said hydroformylation conducted in the presence of water in an amount of more than 0.6 wt % based on the total weight of the reaction mixture and up to its solubility limit under hydroformylation reaction conditions.