David Andrew Stern

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:

7326332, Feb 5, 2008

Filed:

Sep 25, 2003

Appl. No.:

10/671080

Inventors:

Tan-Jen Chen - Kingwood TX, US
John Scott Buchanan - Lambertville NJ, US
Brian Erik Henry - Baton Rouge LA, US
Paul F. Keusenkothen - Houston TX, US
Philip A. Ruziska - Kingwood TX, US
David L. Stern - Annandale NJ, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C10G 11/00
C10G 11/05

US Classification:

20812001, 208 68, 208113, 208114, 502 64, 585519

Abstract:

A multi component catalyst and catalytic cracking process for selectively producing Colefins. The catalyst comprises a first molecular sieve having an intermediate pore size, a second molecular sieve and, optionally a third molecular sieve having a large pore size. At least one of the channels of the second molecular sieve has a pore size index that is less than the pore size index of at least one channel of the first molecular sieve. The process is carried out by contacting a feedstock containing hydrocarbons having at least 5 carbon atoms is contacted, under catalytic cracking conditions, with the multi component catalyst. The catalyst finds application in the cracking of naphtha and heavy hydrocarbon feedstocks.

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:

7615143, Nov 10, 2009

Filed:

Jul 30, 2004

Appl. No.:

10/903152

Inventors:

Tan-Jen Chen - Kingwood TX, US
Paul F. Keusenkothen - Houston TX, US
J. Jason Wu - Clinton NJ, US
John Scott Buchanan - Lambertville NJ, US
Guang Cao - Branchburg NJ, US
Larry L. Iaccino - Seabrook TX, US
David L. Stern - Baton Rouge LA, US
Matthew J. Vincent - Baytown TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C10G 11/05

US Classification:

20812001, 208113, 208114, 208118, 2081201, 20812015, 585653

Abstract:

There is provided a catalyst composition having improved hydrothermal stability for the catalytic cracking of a hydrocarbon feedstock to selectively produce propylene. The catalyst composition comprises a first crystalline molecular sieve selected from the group consisting of IM-5, MWW, ITH, FER, MFS, AEL, and AFO and an effective amount of a stabilization metal (copper, zirconium, or mixtures thereof) exchanged into the molecular sieve. The catalyst finds application in the cracking of naphtha and heavy hydrocarbon feedstocks. When used in the catalytic cracking of heavier hydrocarbon feedstocks, the catalyst composition preferably comprises a second molecular sieve having a pore size that is greater than the pore size of the first molecular sieve. The process is carried out by contacting a feedstock containing hydrocarbons having at least 4 carbon atoms is contacted, under catalytic cracking conditions, with the catalyst composition.

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.

US Patent:

8518244, Aug 27, 2013

Filed:

Jan 23, 2006

Appl. No.:

11/795547

Inventors:

James J. Schorfheide - Oak Hill VA, US
Sean C. Smyth - Schoten, BE
Bal K. Kaul - Fairfax VA, US
David L. Stern - Fairfax VA, US

Assignee:

Exxonmobil Research and Engineering Company - Annandale NJ

International Classification:

C10G 45/02

US Classification:

208212, 208209, 208213

Abstract:

This invention relates to an improved hydrotreating process for removing sulfur from naphtha and distillate feedstreams. This improved process utilizes a hydrotreating zone, an acid gas removal zone, and a pressure swing adsorption zone having a total cycle time of less than about 30 seconds for increasing the concentration of hydrogen utilized in the process.

US Patent:

7361798, Apr 22, 2008

Filed:

Sep 21, 2004

Appl. No.:

10/946553

Inventors:

Michael C. Clark - Pasadena TX, US
Ronald J. Cimini - Friendswood TX, US
Jane C. Cheng - Bridgewater NJ, US
David L. Stern - Baton Rouge LA, US
John Scott Buchanan - Lambertville NJ, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 5/22
C07C 1/20

US Classification:

585475, 585323

Abstract:

The invention relates to a process for producing a desired dialkylbenzene isomer having a formula RCH, where R is an alkyl substituent, by contacting a polyalkylbenzene compound of formula RCH, where n is an integer between 2 and 4, with a monoalkylbenzene compound of formula RCHin the presence of a molecular sieve catalyst under reaction conditions sufficient to produce said dialkybenzene isomer. The preferred molecular sieve catalysts have pores or surface cavities greater than 5. 6 Angstroms in diameter and/or an X-ray diffraction pattern including d-spacing maxima at 12. 40. 25, 6. 90. 15, 3. 570. 07, and 3. 420. 07 Angstrom.

US Patent:

20090071332, Mar 19, 2009

Filed:

Jan 23, 2006

Appl. No.:

11/795548

Inventors:

Bal K. Kaul - Fairfax VA, US
John W. Viets - Fairfax VA, US
Mohsen N. Harandi - Calgary, CA
Julian A. Wolfenbarger - Friendswood TX, US
John Di-Yi Ou - Houston TX, US
David Stern - Asbury NJ, US

International Classification:

B01D 53/047

US Classification:

95 96

Abstract:

The use of rapid cycle pressure swing adsorption having a cycle time of less than 30 s for increasing the hydrogen concentration in hydrogen-containing steams, from a hydrogen source, such as a stream reforming unit.

Address:

4611 Farnington Dr, Houston, TX 77084

VIN:

1FTPW12V67KB49152

Make:

FORD

Model:

F-150

Year:

2007