David G Stern

Address:

1701 Kendrick St, Philadelphia, PA 19152

VIN:

1FMEU73E07UB68519

Make:

FORD

Model:

EXPLORER

Year:

2007

US Patent:

6398947, Jun 4, 2002

Filed:

Sep 27, 1999

Appl. No.:

09/406440

Inventors:

Jeffrey S. Beck - Burlington NJ
Vinaya A. Kapoor - Kirkwood Voorhees NJ
David L. Stern - Mount Laurel NJ
John H. Thurtell - Glen Mills PA

Assignee:

Exxon Mobil Oil Corporation - Fairfax VA

International Classification:

C10G 3506

US Classification:

208 65, 208 63, 208 66, 208134, 208137, 208138

Abstract:

The patent application discloses an integrated process for reformate upgrading. Such a process enables production of a high value product slate, by incorporating the step of reforming along with reaction/diffusion with a zeolite.

US Patent:

6504075, Jan 7, 2003

Filed:

Jan 22, 2001

Appl. No.:

09/767183

Inventors:

Jeffrey S. Beck - Burlington NJ
Carrie L. Kennedy - Turnersville NJ
Wieslaw J. Roth - Sewell NJ
David L. Stern - Mount Laurel NJ

Assignee:

ExxonMobil Oil Corporation - Fairfax VA

International Classification:

C07C 552

US Classification:

585475, 585481

Abstract:

A synthetic porous crystalline material has the structure of ZSM-5 and a composition involving the molar relationship: wherein X is a trivalent element; Y is a tetravalent element; and n is less than 25, and wherein the slope of the nitrogen sorption isotherm of the material at a partial pressure of nitrogen of 0. 4 to 0. 7 and a temperature 77Â K is greater than 30. The material has a mesoporous surface area (MSA) greater than 45 m /g and is useful as a catalyst in the liquid phase isomerization of xylene.

US Patent:

6576582, Jun 10, 2003

Filed:

Nov 15, 1995

Appl. No.:

08/558309

Inventors:

Jeffrey S. Beck - Lawrenceville NJ
Jane C. Cheng - Clarksburg NJ
Sharon B. McCullen - Newtown PA
David H. Olson - Pennington NJ
David L. Stern - Lawrenceville NJ

Assignee:

ExxonMobil Oil Corporation - Fairfax VA

International Classification:

B01J 2906

US Classification:

502 71, 502 63, 502 64, 502 77, 502 85

Abstract:

There is provided a substantially binder-free catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The catalyst may be used in a hydrocarbon conversion process, such as toluene disproportionation.

US Patent:

6610264, Aug 26, 2003

Filed:

May 5, 1995

Appl. No.:

08/435920

Inventors:

John Scott Buchanan - Trenton NJ
David L. Stern - Lawrenceville NJ
Gerald J. Teitman - Vienna VA

Assignee:

ExxonMobil Oil Corporation - Fairfax VA

International Classification:

B01D 5348

US Classification:

4232421, 423222, 42324401, 42324402, 42324406, 42324407, 4235731, 4235741, 4235768

Abstract:

A process and system is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides. Oxidized tail-gas is directed into an absorber where a solid absorbent absorbs substantially all the sulfur oxides thereon. After allowing sufficient time for a desired amount of sulfur oxides to be absorbed, absorption is ceased. Next, the solid absorbent containing the absorbed sulfur oxides is contacted with a reducing gas so as to release an off gas containing hydrogen sulfide and sulfur dioxide. Upon releasing sulfur from the solid absorbent, the solid absorbent is regenerated and redirected into the absorber. Sulfur in the off gas emitted by regeneration is concentrated to an extent sufficient for use within a Claus sulfur recovery process for conversion to elemental sulfur. By combining this process with a Claus sulfur recovery process, sulfur dioxide emissions can be reduced to less than about two parts per million.

US Patent:

6777583, Aug 17, 2004

Filed:

Aug 26, 2002

Appl. No.:

10/227663

Inventors:

Jeffrey S. Beck - Lawrenceville NJ
Jane C. Cheng - Clarksburg NJ
Sharon B. McCullen - Newtown PA
David H. Olson - Pennington NJ
David L. Stern - Lawrenceville NJ

Assignee:

ExxonMobil Oil Corporation - Irving TX

International Classification:

C07C 552

US Classification:

585475, 585470, 208 46

Abstract:

There is provided a substantially binder-free catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The catalyst may be used in a hydrocarbon conversion process, such as toluene disproportionation.

US Patent:

7166756, Jan 23, 2007

Filed:

Nov 25, 2003

Appl. No.:

10/722242

Inventors:

Madhav Acharya - Vienna VA, US
David L. Stern - Baton Rouge LA, US

Assignee:

Exxonmobil Research and Engineering Company - Annandale NJ

International Classification:

C07C 5/23
C07C 5/27

US Classification:

585481, 585482, 585666, 585670, 585739

Abstract:

The present invention is directed at a process to isomerize C hydrocarbon feedstreams by contacting a C hydrocarbon feedstream with a steamed catalyst.

US Patent:

7553790, Jun 30, 2009

Filed:

Oct 25, 2005

Appl. No.:

11/258440

Inventors:

Jean W. Beeckman - Columbia MD, US
Glenn R. Sweeten - East Stroudsburg PA, US
Daria N. Lissy - Glen Mills PA, US
David L. Stern - Baton Rouge LA, US
Stephen J. McCarthy - Center Valley PA, US
Dominick N. Mazzone - Wenonah NJ, US
Christine N. Elia - Bridgewater NJ, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B01J 29/06

US Classification:

502 60, 502 64, 502 85

Abstract:

The present invention describes a method to increase the activity of a catalyst by first performing an ion exchange step with a potassium ion, followed by performing an ion-exchange step with an ammonium ion. Specifically, the present invention describes a method to increase the acidity of a zeolite by incorporating a potassium salt ion-exchange prior to an ammonium salt ion-exchange step. Even more specifically, the present invention is drawn to a method of increasing the activity of a zeolite by employing more than one potassium ion exchanges followed by at least one ammonium ion exchange. The present invention also describes a method to reduce the amount of sodium normally found in commercially produced zeolite by employing any of these methods. The present invention is also drawn to the catalysts produced by any of these methods.

US Patent:

8187456, May 29, 2012

Filed:

Jan 23, 2006

Appl. No.:

11/795552

Inventors:

John W. Viets - Fairfax VA, US
Narasimhan Sundaram - Fairfax VA, US
Bal K. Kaul - Fairfax VA, US
David L. Stern - Fairfax VA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10G 49/22

US Classification:

2081113, 208108, 20811135

Abstract:

An improved process for hydrocracking heavy petroleum feedstocks wherein hydrogen-containing streams associated with a hydrocracker are subjected to rapid cycle pressure swing adsorption having a cycle time of less than 30 S.