Stabilization of hydroformylation catalysts based on phoshoramide ligands
AssigneeBASF SE
InventorsRainer Papp, Wolfgang Ahlers, Thomas Mackewitz, Rocco Paciello, Martin Volland
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Abstract
The present invention relates to a process for the hydroformylation of ethylenically unsaturated compounds by reaction with carbon monoxide and hydrogen in the presence of a catalytically active fluid which comprises a dissolved metal complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one phosphoramidite compound as ligand, wherein the fluid is brought into contact with a base.
Claims20
A process for the hydroformylation of compounds which comprises, providing at least one compound with an ethylenically unsaturated double bond and reacting the at least one compound with carbon monoxide and hydrogen in at least one reaction zone in the presence of a catalytically active fluid which comprises a dissolved metal complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one phosphoramidite compound as ligand, wherein the fluid is brought into contact with at at least one base base.
A process according to any of the preceding claims, wherein the phosphoramidite compound is selected from among compounds of the formula II.1
- where R1 and R5 are each, independently of one another, pyrrole groups bound via the nitrogen atom to the phosphorus atom,
- R2 and R4 are each, independently of one another, alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl, or R1 together with R2 and/or R4 together with R5 forms a divalent group containing at least one pmrrole group bound via the pmrrolic nitrogen atom to the phosphorus atom,
- Y is a divalent bridged group having from 2 to 20 bridge atoms,
- and b and c are each, independently of one another, 0 or 1.
A method of stabilizing a catalytically active fluid comprising a dissolved metal complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one phosphoramidite compound as ligand in the hydroformylation of ethylenically unsaturated compounds, which comprises bringing the fluid into contact with at least one base.
The use of at least one base for stabilizing a catalytically active fluid comprising a dissolved metal complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one phosphoramidite compound as ligand in the hydroformylation of ethylenically unsaturated compounds.
Dependencies are inferred from the claim text.