Patent ID: 6040483
Filing Date: 2000-03-21
Classification: C07C

Abstract:
A process comprising conducting a liquid-phase hydroformylation of at least one internal olefin by carbon monoxide and hydrogen in the presence of a catalytic composition that contains at least one compound of a transition metal other than ruthenium, a phosphorous-containing ligand consisting essentially of at least one phosphine oxide of the formula R.sub.1 R.sub.2 R.sub.3 PO wherein R.sub.1 R.sub.2 and R.sub.3 being identical or different represent hydrocarbyl of 1-12 carbon atoms, and at least one organic-inorganic salt that does not contain tin or germanium; said salt is at least one quaternary ammonium salt and/or at least one quaternary phosphonium salt of general formula Q.sup.+ A.sup.-, in which Q.sup.+ represents an ammonium and/or a quaternary phosphonium and A.sup.- represents an anion wherein A.sup.- is tetrafluoroborate providing that Q.sup.+ represent quaternary ammonium or anion A.sup.- is selected from the group consisting of hexafluorophosphate, hexafluoroantimonate, hexafluoroarsenate, fluorosulphonate, bis-perfluoroalkylsulphonyl amides, perfluoroalkyl sulphonates, dichlorocuprate, tetrachloroborate, tetrachloroaluminate, and trichlorozincate so as to produce selectively aldehydes at high conversion rates of said internal olefins in an organic phase, and to produce a polar phase containing at least part of the catalyst.