Catalyst complex and use thereof in alkane oligomerization

Patent metadata

Field	Value
Publication number	US-9676682-B2
Application number	US-201414483008-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 10, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

Provided is a Group 9 novel metal catalyst complex further comprising a ketone-containing cocatalyst. The metal catalyst complex is useful in generating olefins from alkanes with great efficiency. In one embodiment, provided is an iridium catalyst complex useful in the dehydrogenation of alkanes comprising a ketone-containing cocatalyst and iridium complexed with a tridentate ligand. Also provided is a novel dehydrogenation method which utilizes the catalyst composition. In other embodiments, a novel process for preparing oligomers from alkanes utilizing the catalyst composition is provided.

First claim

That which is claimed is:

1. A catalyst composition useful in the dehydrogenation of alkanes comprising a ketone containing cocatalyst and a Group 9 metal complex, wherein the metal complex is a composition of the formula LMX(X′) n , where n=0, 1 or 2;
X and X′ are moieties into which a monomer can insert or which can be eliminated from the metal center to generate a fragment LM;
M is a Group 9 metal; and
L is a tridentate ligand with L having the formula:

wherein A and A′ are independently selected from the group consisting of:

R 1 , R 2 , R 3 and R* are independently selected from the group consisting of halide, hydride, triflate, acetate, borate, C 1 through C 12 alky, C 1 through C 12 alkoxy, C 3 through C 12 cycloalkyl, C 3 through C 12 cycloalkoxy, C 6 through C 14 aryl, C 7 through C 17 aralkyl and olefins;
and Y is selected from the group consisting of C—H, C—Cl, C—Br, C—I, N, P, C—OR 4 , wherein R 4 is hydrogen, an optionally substituted acyl group, a substituted or unsubstituted alkylsulfonyl group, or other leaving group; and p=0, 1 or 2.

2. The catalyst composition of claim 1 , wherein the Group 9 metal is iridium.

3. The catalyst composition of claim 1 , wherein the ketone containing cocatalyst comprises benzophenone.

4. The catalyst complex of claim 1 , wherein X and X′ are independently selected from the group consisting of halides, hydride, triflate, acetates, borates, C 1 through C 12 alky, C 1 through C 12 alkoxy, C 3 through C 12 cycloalkyl, C 3 through C 12 cycloalkoxy, aryl and olefins.

5. The catalyst complex of claim 1 , wherein the ligand is 2,6-bis (di-iso-propylphosphino) phenyl-1.

Assignees

• Goldman Alan Stuart
• Saxton Robert J
• Mironov Oleg
• Chevron Usa Inc
• Univ Rutgers

Inventors

• Goldman Alan Stuart
• Stibrany Robert Timothy
• Saxton Robert J
• Mironov Oleg

Classifications

• B01J2531/827

  Iridium · CPC title

• C07C2531/14

  of aluminium or boron · CPC title

• C07C5/333

  Catalytic processes · CPC title

• C07C5/48

  with oxygen as an acceptor · CPC title

• B01J31/0208

  Ketones or ketals · CPC title