William A Behrmann

US Patent:

RE37649, Apr 9, 2002

Filed:

Aug 13, 1998

Appl. No.:

09/133420

Inventors:

Larry E. Pedrick - Baton Rouge LA
Charles H. Mauldin - Baton Rouge LA
William C. Behrmann - Baton Rouge LA

Assignee:

Exxon Research and Engineering Company - Annandale NJ

International Classification:

B01J 3858

US Classification:

502 30, 502 31, 502 53, 518700, 518709, 518710, 518715, 518719

Abstract:

Catalyst in a slurry phase reactor is rejuvenated and uniformly distributed in said reactor using a substantially vertical draft tube fully immersed in the slurry which utilizes a rejuvenating gas injected substantially near the bottom of the substantially vertical draft tube whereby catalyst near the bottom of the slurry phase reactor is drawn up the draft tube and discharged from the top of the draft tube near the top of the slurry phase in said reactor.

US Patent:

51680912, Dec 1, 1992

Filed:

Sep 30, 1991

Appl. No.:

7/770077

Inventors:

William C. Behrmann - Baton Rouge LA
Stephen M. Davis - Baton Rouge LA
Charles H. Mauldin - Baton Rouge LA

Assignee:

Exxon Research and Engineering Company - Florham Park NJ

International Classification:

B01J 3718
B01J 2374
B01J 2376
B01J 2384

US Classification:

502325

Abstract:

The activity of supported cobalt catalysts for hydrocarbon synthesis is maximized by carrying out the reduction at conditions that keep both the partial pressure of water vapor and the maximum reduction temperature below critical maximum values. For titania supported cobalt catalysts, the preferred maximum water partial pressure is one atmosphere and the preferred maximum reduction temperature is 375. degree. C.

US Patent:

62848070, Sep 4, 2001

Filed:

Aug 14, 1998

Appl. No.:

9/134304

Inventors:

Stephen C. Leviness - Plano TX
Charles J. Mart - Baton Rouge LA
William C. Behrmann - Baton Rouge LA
Stephen J. Hsia - Baton Rouge LA
Daniel R. Neskora - Baton Rouge LA

Assignee:

Exxon Research and Engineering Company - Annandale NJ

International Classification:

C07C 104
B01J 3810
B01J 2396

US Classification:

518710

Abstract:

A slurry catalytic hydrocarbon synthesis process which employs a catalyst comprising a supported cobalt component achieves a short term catalyst half life of more than 10 days, by using a syngas feed which contains less than fifty parts per billion of a combined total amount of HCN and NH. sub. 3.

US Patent:

52683443, Dec 7, 1993

Filed:

Dec 18, 1992

Appl. No.:

7/994215

Inventors:

Larry E. Pedrick - Baton Rouge LA
Charles H. Mauldin - Baton Rouge LA
William C. Behrmann - Baton Rouge LA

Assignee:

Exxon Research & Engineering Company - Florham Park NJ

International Classification:

B01J 3858
B01J 3856
B01J 3810
C07C 104

US Classification:

502 30

Abstract:

Catalyst in a slurry phase reactor is rejuvenated and uniformly distributed in said reactor using a substantially vertical draft tube fully immersed in the slurry which utilizes a rejuvenating gas injected substantially near the bottom of the substantially vertical draft tube whereby catalyst near the bottom of the slurry phase reactor is drawn up the draft tube and discharged from the top of the draft tube near the top of the slurry phase in said reactor.

US Patent:

RE374067, Oct 9, 2001

Filed:

Aug 13, 1998

Appl. No.:

9/133422

Inventors:

William C. Behrmann - Baton Rouge LA
Kym B. Arcuri - Baton Rouge LA
Charles H. Mauldin - Baton Rouge LA

Assignee:

Exxon Research and Engineering Co. - Florham Park NJ

International Classification:

C07C 2706

US Classification:

518715

Abstract:

A supported particulate cobalt catalyst is formed by dispersing cobalt, alone or with a metal promoter, particularly rhenium, as a thin catalytically active film upon a particulate support, especially a silica or titania support. This catalyst can be used to convert an admixture of carbon monoxide and hydrogen to a distillate fuel constituted principally of an admixture of linear paraffins and olefins, particularly a C. sub. 10+ distillate, at high productivity, with low methane selectivity. A process is also disclosed for the preparation of these catalysts.

US Patent:

59730129, Oct 26, 1999

Filed:

Oct 30, 1998

Appl. No.:

9/182902

Inventors:

William C. Behrmann - Baton Rouge LA
Stephen C. Leviness - Baton Rouge LA

Assignee:

Exxon Research and Engineering Co. - Florham Park NJ

International Classification:

C07C 2700

US Classification:

518700

Abstract:

A reversibly deactivated, particulate catalyst in a slurry hydrocarbon synthesis slurry is rejuvenated by circulating the slurry from a slurry body through (i) a gas disengaging zone to remove gas bubbles from the slurry, (ii) a catalyst rejuvenation zone in which a catalyst rejuvenating gas contacts the catalyst in the slurry to rejuvenate it and form a rejuvenated catalyst slurry and, (iii) back into the slurry body. Removing at least a portion of the gas bubbles improves the rejuvenation process.

US Patent:

52584119, Nov 2, 1993

Filed:

Jun 10, 1992

Appl. No.:

7/896283

Inventors:

William C. Behrmann - Baton Rouge LA
Stephen M. Davis - Baton Rouge LA
Charles H. Mauldin - Baton Rouge LA

Assignee:

Exxon Research and Engineering Co. - Florham Park NJ

International Classification:

C07C 114

US Classification:

518715

Abstract:

The activity of supported cobalt catalysts for hydrocarbon synthesis is maximized by carrying out the reduction at conditions that keep both the partial pressure of water vapor and the maximum reduction temperature below critical maximum values. For titania supported cobalt catalysts, the preferred maximum water partial pressure is one atmosphere and the preferred maximum reduction temperature is 375. degree. C.

US Patent:

58177027, Oct 6, 1998

Filed:

May 2, 1997

Appl. No.:

8/850566

Inventors:

William C. Behrmann - Baton Rouge LA
Stephen C. Leviness - Baton Rouge LA

Assignee:

Exxon Research And Engineering Company - Florham Park NJ

International Classification:

C07C 2700

US Classification:

518700

Abstract:

A reversibly deactivated, particulate catalyst in a slurry hydrocarbon synthesis slurry is rejuvenated by circulating the slurry from a slurry body through (i) a gas disengaging zone to remove gas bubbles from the slurry, (ii) a catalyst rejuvenation zone in which a catalyst rejuvenating gas contacts the catalyst in the slurry to rejuvenate it and form a rejuvenated catalyst slurry and, (iii) back into the slurry body. Removing at least a portion of the gas bubbles improves the rejuvenation process.