David Wayne Stern

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:

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:

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:

20120253770, Oct 4, 2012

Filed:

Nov 15, 2010

Appl. No.:

13/513816

Inventors:

David Stern - Houston TX, US
Adedayo S. Oyerinde - Sugar Land TX, US
Isha Sahni - Houston TX, US
Ganesan Subramanian - Bellaire TX, US

International Classification:

G06G 7/57

US Classification:

703 10

Abstract:

A method for matching production history to flow simulations includes identifying a plurality of parameters that control an objective function measuring the mismatch between a flow simulation response in a parameter subspace and a production history. A value is calculated for an objective function and for a static measurement at each of a plurality of experiments in the parameter subspace. These results are used to develop a mathematical relationship between one or more static measurements and the objective function. During subsequent adjustment of the simulation model, a target window in the objective function is identified, and flow simulations are performed for each modified model that is predicted from the static geologic measurement to produce an objective function within the window. An objective function of each flow simulation to the production history is calculated and the procedure is iterated until the objective function is within a target range.

US Patent:

58710531, Feb 16, 1999

Filed:

Mar 21, 1997

Appl. No.:

8/822172

Inventors:

David Stern - Houston TX

Assignee:

Exxon Production Research Company - Houston TX

International Classification:

E21B 4300

US Classification:

166401

Abstract:

The invention described here is a method for using produced fluid compositions to decide how to modify injection/production strategies in oil recovery processes that involve injection of non-aqueous recovery agents ("Injectant"). The procedure is based on the premise that once a given zone is swept by injectant, most subsequent hydrocarbon recovery from that zone will occur by vaporization or extraction into the injectant. Because only the most volatile hydrocarbon components can be extracted, hydrocarbons produced by displacement can be distinguished from those produced by extraction by examining the hydrocarbon composition. Heavy, non-volatile components are recovered only by displacement. The disclosed method determines quantities of displaced vs. extracted hydrocarbons by comparing the produced hydrocarbon composition to that of the original in-place oil.

Address:

4611 Farnington Dr, Houston, TX 77084

VIN:

1FTPW12V67KB49152

Make:

FORD

Model:

F-150

Year:

2007