Robert E Larson

US Patent:

7297830, Nov 20, 2007

Filed:

Sep 14, 2005

Appl. No.:

11/226493

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
James E. Rekoske - Glenview IL, US
Robert B. Larson - Chicago IL, US
Patrick C. Whitchurch - Villa Park IL, US
John E. Bauer - LaGrange Park IL, US
Michael H. Quick - Arlington Heights IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/22

US Classification:

585481, 585482, 585480

Abstract:

Reduced co-production of toluene and Cand higher aromatics such as trimethylbenzene, methylethylbenzene, and diethylbenzene is achieved in processes for the isomerization of xylenes to close to equilibrium using a layered catalyst having a thin outer layer of molecular sieve and hydrogenation metal component on a core, wherein at least about 75 mass-% of the hydrogenation metal component is in the outer layer.

US Patent:

7301064, Nov 27, 2007

Filed:

Sep 14, 2005

Appl. No.:

11/225976

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
Patrick C. Whitchurch - Villa Park IL, US
Robert B. Larson - Chicago IL, US
James E. Rekoske - Glenview IL, US
Dimitri A. Trufanov - Arlington Heights IL, US
Victor C. Patton - Darien IL, US
Suheil F. Abdo - Lincolnshire IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/29
C07C 4/12

US Classification:

585480, 585481, 585489

Abstract:

Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene and dealkylating ethylbenzene in feed streams that exhibit stability, selectivity and low ring loss.

US Patent:

7381677, Jun 3, 2008

Filed:

Sep 14, 2005

Appl. No.:

11/226037

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
Patrick C. Whitchurch - Villa Park IL, US
Robert B. Larson - Chicago IL, US
James E. Rekoske - Glenview IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

B01J 29/06

US Classification:

502 64, 502 66, 502 71, 502 73, 502 74, 502 77, 502 78, 502 79

Abstract:

Catalysts comprise a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component and a sufficient amount of at least one platinum group metal hydrogenation component to enhance the isomerization activity of the catalyst.

US Patent:

7446237, Nov 4, 2008

Filed:

Jul 11, 2007

Appl. No.:

11/775998

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
Patrick C. Whitchurch - Bossier City LA, US
Robert B. Larson - Chicago IL, US
James E. Rekoske - Glenview IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/23

US Classification:

585481, 585482, 585489

Abstract:

Catalysts comprise a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component and a sufficient amount of at least one platinum group metal hydrogenation component to enhance the isomerization activity of the catalyst.

US Patent:

7525008, Apr 28, 2009

Filed:

May 25, 2005

Appl. No.:

11/137292

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
John E. Bauer - La Grange Park IL, US
Gregory F. Maher - Aurora IL, US
Robert B. Larson - Chicago IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/29

US Classification:

585481, 585482, 585480

Abstract:

A process for isomerizing ethylbenzene into xylenes such as para-xylene using a zeolitic catalyst system based on low Si/AlMTW-type zeolite that preferably is substantially free of mordenite. The catalyst may be bimetallic where the two metals are platinum and tin.

US Patent:

8134037, Mar 13, 2012

Filed:

Nov 9, 2009

Appl. No.:

12/614780

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
Robert B. Larson - Lisle IL, US
James E. Rekoske - Glenview IL, US
Patrick J. Silady - Niles IL, US
Patrick C. Whitchurch - Bossier City LA, US
Freddie Sandifer - Chicago IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/22
C10G 35/00
C10G 35/04
B01J 8/02
B01J 35/02

US Classification:

585481, 585477, 585480, 208133, 208134, 422211

Abstract:

Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.

US Patent:

8247630, Aug 21, 2012

Filed:

Mar 12, 2009

Appl. No.:

12/403036

Inventors:

Paula L. Bogdan - Mount Prospect IL, US
John E. Bauer - LaGrange Park IL, US
Gregory F. Maher - Aurora IL, US
Robert B. Larson - Lisle IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/27

US Classification:

585482, 585481

Abstract:

A process for isomerizing ethylbenzene into xylenes such as para-xylene using a zeolitic catalyst system based on low Si/AlMTW-type zeolite that preferably is substantially free of mordenite. The catalyst may be bimetallic where the two metals are platinum and tin.

US Patent:

20050143615, Jun 30, 2005

Filed:

Dec 30, 2003

Appl. No.:

10/749179

Inventors:

Paula Bogdan - Mount Prospect IL, US
John Bauer - LaGrange Park IL, US
Robert Larson - Chicago IL, US

International Classification:

C07C005/22

US Classification:

585481000

Abstract:

A process for isomerizing ethylbenzene into xylenes such as para-xylene using a bimetallic zeolitic catalyst system based on MTW-type zeolite is disclosed. Preferably the two metals are platinum and tin. The invention obtains a stable and improved yield of xylenes such as para-xylene without excess benzene production by dealkylation. The zeolitic silica-to-alumina ratio ranges from 20 to 45. Use of MTW substantially free of mordenite improves yields and integrated aromatics complex economics by reducing undesirable aromatic ring-loss reactions.