Method for separating catalyst from a hydroformylation reaction product using alkylated ligands
AssigneeExxon Chemical Patents Inc.
InventorsHarry W. Deckman, Edward Kantner, Joel R. Livingston, Jr., Michael G. Matturro, Edmund J. Mozeleski
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Abstract
A catalyst for use in hydroformylation of olefins which comprises a Group VIII noble metal complexed with a phosphine ligand having at least one alkyl or aryl group bonded thereto, such as tris-4-propylphenyl phosphines and tris-4-octylphenyl phosphines. These and other triphenylphosphine catalysts can be separated from a crude reaction product of a noble metal-catalyzed hydroformylation reaction by contacting the crude reaction product with a dense polymeric, nonpolar membrane, preferably nonpolar polyolefin membranes.
Claims40
A method for separating a noble metal catalyst from a crude reaction product of a noble metal-catalyzed hydroformylation reaction, said crude reaction product including a Group VIII noble metal-ligand complex catalyst, unreacted olefin feed and a hydroformylation reaction product, said ligand of the Group VIII noble metal-ligand complex catalyst is an alkylated or arylated ligand, wherein the method comprises:
- (a) contacting said crude reaction product with a membrane capable of allowing a substantial portion of said unreacted olefin feed and hydroformylation reaction product to pass therethrough while retaining a substantial portion of said Group VIII noble metal-ligand complex catalyst;
- (b) removing unreacted olefin feed and said hydroformylation reaction product which passes through said membrane as permeate;
- and (c) retaining said Group VIII noble metal-ligand complex catalyst as retentate.
A method for producing higher aldehydes and higher alcohols which comprises:
- (a) hydroformylating an olefinic feedstock with synthesis gas in the presence of a Group VIII noble metal-ligand complex catalyst to form a crude reaction product comprised of an olefin feed, a hydroformylation reaction product and a Group VIII noble metal-ligand complex catalyst, said ligand of the Group VIII noble metal-ligand complex catalyst is an alkylated or arylated ligand;
- (b) removing said Group VIII noble metal-ligand complex catalyst from said crude reaction product by feeding said crude reaction product to a membrane separator which comprises a membrane capable of allowing a substantial portion of said hydroformylation reaction product and unreacted olefin feed to pass therethrough while retaining a substantial portion of said Group VIII noble metal-ligand complex catalyst;
- (c) recovering said hydroformylation reaction product and said unreacted olefin feed as permeate;
- (d) retaining said Group VIII noble metal-ligand complex catalyst as retentate;
- and
- (e) recycling the retained Group VIII noble metal-ligand complex catalyst to said hydroformylation step (a).
A catalyst for use in hydroformylation of olefins which comprises a Group VIII noble metal-ligand complex wherein said ligand is an alkylated or arylated ligand.
A method for separating a noble metal catalyst from a crude reaction product of a noble metal-catalyzed hydroformylation reaction, said crude reaction product including a Group VIII noble metal-ligand complex catalyst, unreacted olefin feed and a hydroformylation reaction product, wherein the method comprises:
- (a) contacting said crude reaction product with a dense polymeric, nonpolar membrane capable of allowing a substantial portion of said unreacted olefin feed and hydroformylation reaction product to pass therethrough while retaining a substantial portion of said Group VIII noble metal-ligand complex catalyst;
- (b) removing unreacted olefin feed and said hydroformylation reaction product which passes through said membrane as permeate;
- and (c) retaining said Group VIII noble metal-ligand complex catalyst as retentate.
A method for producing higher aldehydes and higher alcohols which comprises:
- (a) hydroformylating an olefinic feedstock with synthesis gas in the presence of a Group VIII noble metal-ligand complex catalyst to form a crude reaction product comprised of an olefin feed, a hydroformylation reaction product and a Group VIII noble metal-ligand complex catalyst;
- (b) removing said Group VIII noble metal-ligand complex catalyst from said crude reaction product by feeding said crude reaction product to a membrane separator which comprises a dense polymeric, nonpolar membrane capable of allowing a substantial portion of said hydroformylation reaction product and unreacted olefin feed to pass therethrough while retaining a substantial portion of said Group VIII noble metal-ligand complex catalyst;
- (c) recovering said hydroformylation reaction product and said unreacted olefin feed as permeate;
- (d) retaining said Group VIII noble metal-ligand complex catalyst as retentate;
- and
- (e) recycling the retained Group VIII noble metal-ligand complex catalyst to said hydroformylation step (a).
Dependencies are inferred from the claim text.