Process to prepare a linear aldehyde
AssigneesE. I. Du Pont de Nemours and Company, Dsm N.V.
InventorsAnne Irisa Breikss, Patrick M. Burke, James Michael Garner, Wilson Tam
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Abstract
The invention relates to a process for the preparation of linear aldehydes by hydroformylation of ethylenically unsaturated organic compounds in the presence of a catalyst system comprising a Group VIII metal and a bidentate organic ligand. The bidentate organic ligand is characterized in that it has two trivalent phosphorus atoms each containing at least one P--C or one P--N bond.
Claims29
Process for the preparation of a linear aldehyde organic compound starting from an ethylenically unsaturated organic compound by hydroformylation in the presence of a catalyst system comprising a Group VIII metal and a bidentate organic ligand having two trivalent phosphorus atoms, characterized in that the two phosphorus atoms are linked with a 2,2'-dihydroxyl-1,1'-binapthalene or 2,2'-dihydroxyl-1,1'-biphenylene bridging group (Q). The ligand has the structure:
- ##STR12## R.sup.3 and R.sup.4 are the same or different aryl or nitrogen containing heterocycle groups, where the nitrogen is bound to the phosphorus.
A hydroformylation catalyst composition comprising rhodium and a bidentate organic ligand having two trivalent phosphorus atoms, ##STR13## in which the two phosphorus atoms are linked with a 2,2'-dihydroxyl-1,1'-binapthalene bridging group (Q), which bridging group has substituents R.sup.1 and R.sup.2 in the 3,3'-positions, where R.sup.1 and R.sup.2 can be hydrogen or a substituent other than hydrogen, in which R.sup.3 and R.sup.4 are the same or different monovalent aryl groups or where R.sup.3 and R.sup.4 are the same or different nitrogen containing heterocycle groups, where the nitrogen is bound to phosphorus.
Dependencies are inferred from the claim text.