David M Stern

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:

6660896, Dec 9, 2003

Filed:

Apr 16, 2003

Appl. No.:

10/418439

Inventors:

John Scott Buchanan - Lambertville NJ
Xiaobing Feng - Houston TX
Gary David Mohr - Houston TX
David L. Stern - Annandale NJ

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 527

US Classification:

585481, 585480, 585482, 585314

Abstract:

In a process for isomerizing a feed comprising ethylbenzene and a mixture of xylene isomers, the feed is first contacted under xylene isomerization conditions with a first catalyst composition to produce an intermediate product having a higher para-xylene concentration than the feed, and then the intermediate product is contacted under ethylbenzene isomerization conditions with a second catalyst composition. The second catalyst composition comprises a hydrogenation-dehydrogenation component and a molecular sieve having 10-membered ring pores and is effective to selectively isomerize at least part of the ethylbenzene in the intermediate product to para-xylene and thereby produce a further product having a para-xylene concentration greater than the equilibrium concentration of para-xylene at said ethylbenzene isomerization conditions.

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:

6973588, Dec 6, 2005

Filed:

Nov 27, 2002

Appl. No.:

10/306527

Inventors:

Dana C. DeMeo - Lake Grove NY, US
David Stern - Centereach NY, US
Thomas Wulff - North Patchogue NY, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

G06F011/00

US Classification:

714 6, 714727

Abstract:

An architecture for updating corrupted instructions in a computing device. The computing device includes a housing for enclosing a flash memory for storing a boot loader routine, and at least one boundary-scan device internal to the computing device for processing the boot loader routine, and operatively disposed on a boundary-scan bus. The housing includes a boundary-scan port through which updated instructions are communicated and power provided. The port is concealed under a label, cover, or in a location that limits access by the device owner, such as the battery well.

US Patent:

7115538, Oct 3, 2006

Filed:

Dec 4, 2002

Appl. No.:

10/309634

Inventors:

John Scott Buchanan - Lambertville NJ, US
Robert A. Crane - Hellertown PA, US
Doron Levin - Annandale NJ, US
Daria N. Lissy - Glen Mills PA, US
Gary D. Mohr - Houston TX, US
David L. Stern - Baton Rouge LA, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

B01J 29/87
B01J 29/06

US Classification:

502 60, 502 64, 502 66, 502 74, 502 77

Abstract:

An ethylbenzene conversion catalyst is described which comprises a molecular sieve and a hydrogenation metal, wherein the catalyst exhibits a benzene hydrogenation activity at 100 C. of less than about 100 and a metal dispersion, as measured by hydrogen chemisorption, greater than 0. 4 and wherein the molecular sieve is steamed to an alpha value of less than 400 prior to incorporation of the palladium with the molecular sieve.