Catalyst recovery
AssigneeUop LLC
InventorsEdwin H. Homeier, Alan R. Dodds, Tamotsu Imai
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Abstract
Catalysts which comprise metal carbonyls or organometallic complexes in which the metal portion of the complex is selected from a Group VIII metal are useful in hydroformylation reactions. The catalysts which are homogeneous in nature may be recovered from the hydroformylation products by treating the catalyst complex with a nitrogen-containing compound in an aqueous phase whereby said catalyst may be easily separated from the hydroformylation products and recovered.
Claims8
A process for the extraction of a Group VIII metal catalyst contained in the products of a hydroformylation reaction of an olefin, carbon monoxide and hydrogen in the presence of said catalyst, the catalyst being in the form of a metal carbonyl or organometallic complex in homogeneous admixture with said reaction products, which process comprises treating the catalyst-containing reaction products, at a temperature of from about ambient to about 100.degree. C. and a pressure of from about 0 to about 1000 psig., with the addition of an aqueous solution of a water-soluble nitrogen-containing compound selected from the group consisting essentially of ammonia, ammonium hydroxide and amines capable of acting as a complexing agent at said temperature and pressure, wherein said added nitrogen-containing compound complexes with said catalyst and recovering a separated aqueous phase containing the extracted resultant metal-containing complex.
Dependencies are inferred from the claim text.