Lei Z Zhang

US Patent:

6441251, Aug 27, 2002

Filed:

Sep 4, 2001

Appl. No.:

09/946711

Inventors:

Doron Levin - Annandale NJ
Jose G. Santiesteban - Bethlehem PA
Lei Zhang - Bridgewater NJ

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 3708

US Classification:

568798, 568385, 568485, 568741, 568754

Abstract:

A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising an inorganic, porous, crystalline material, designated as M41S, exhibiting, after calcination, an x-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 Angstrom Units with a relative intensity of 100 and a benzene adsorption capacity of greater than 15 grams of benzene per 100 grams of said material at 50 torr and 25Â C. , wherein said material comprises sulfonate functionality.

US Patent:

7453018, Nov 18, 2008

Filed:

Nov 12, 2004

Appl. No.:

10/987324

Inventors:

Jihad Mohammed Dakka - Whitehouse Station NJ, US
John Scott Buchanan - Lambertville NJ, US
Robert Andrew Crane - Hellertown PA, US
Christine Nicole Elia - Bridgewater NJ, US
Xiaobing Feng - Houston TX, US
Larry Lee Iaccino - Seabrook TX, US
Gary David Mohr - Houston TX, US
Brenda Anne Raich - Annandale NJ, US
Lei Zhang - Bridgewater NJ, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 2/66

US Classification:

585467

Abstract:

This invention relates to a process for the selective alkylation of toluene and/or benzene with an oxygen-containing alkylation agent. In particular, the process uses a selectivated molecular sieve which has been modified by the addition of a hydrogenation component, wherein at least one of the following conditions is met: (a) the selectivated molecular sieve has an alpha value of less than 100 prior to the addition of the hydrogenation component, or (b) the selectivated and hydrogenated catalyst has an alpha value of less than 100. The process of this invention provides high selectivity for the alkylated product while reducing catalyst degradation.

US Patent:

7641786, Jan 5, 2010

Filed:

Nov 14, 2005

Appl. No.:

11/667235

Inventors:

Frank Cheng-Yu Wang - Annandale NJ, US
Lei Zhang - Vienna VA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

G01N 30/46
G01N 30/06

US Classification:

208 33, 208 18, 208 20, 208 24, 436 33, 436 40, 436 60

Abstract:

The invention relates to a method for analyzing a lubricating oil for low temperature properties. The method utilizes 2-dimensional gas chromatography (2D GC) to determine the amounts of paraffins and isoparaffins in the oil. In particular, the method analyzes for a particular isoparaffin fraction which is correlated to low temperature performance. The compositional information thus obtained is correlated with formulated oil Mini Rotary Viscometer (MRV) properties.

US Patent:

7642095, Jan 5, 2010

Filed:

Nov 14, 2005

Appl. No.:

11/667234

Inventors:

Frank Cheng-Yu Wang - Annandale NJ, US
Lei Zhang - Vienna VA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

G01N 30/06
G01N 30/46

US Classification:

436 60, 436 33, 436 40, 208 18, 208 20, 208 24, 208 33

Abstract:

A process for producing lube basestocks involving solvent dewaxing a waxy feed to produce at least a partially dewaxed lube oil boiling range stream and then hydrodewaxing the partially dewaxed lube oil boiling range stream to produce a lube basestock.

US Patent:

7799962, Sep 21, 2010

Filed:

Sep 10, 2008

Appl. No.:

12/208011

Inventors:

Jihad Mohammed Dakka - Whitehouse Station NJ, US
John Scott Buchanan - Lambertville NJ, US
Robert Andrew Crane - Hellertown PA, US
Christine Nicole Elia - Bridgewater NJ, US
Xiaobing Feng - Houston TX, US
Larry Lee Iaccino - Seabrook TX, US
Gary David Mohr - Houston TX, US
Brenda Anne Raich - Annandale NJ, US
Lei Zhang - Bridgewater NJ, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C07C 2/68

US Classification:

585467, 585906

Abstract:

This invention relates to a process for the selective alkylation of toluene and/or benzene with an oxygen-containing alkylation agent. In particular, the process uses a selectivated molecular sieve which has been modified by the addition of a hydrogenation component, wherein at least one of the following conditions is met: (a) the selectivated molecular sieve has an alpha value of less than 100 prior to the addition of the hydrogenation component, or (b) the selectivated and hydrogenated catalyst has an alpha value of less than 100. The process of this invention provides high selectivity for the alkylated product while reducing catalyst degradation.

US Patent:

8030240, Oct 4, 2011

Filed:

Dec 18, 2008

Appl. No.:

12/316979

Inventors:

Christine N. Elia - Bridgewater NJ, US
Mohan Kalyanaraman - Media PA, US
Lei Zhang - Vienna VA, US
Michel A. Daage - Hellertown PA, US
Darden Sinclair - Beaumont TX, US
Valery Sokolovskii - Sunnyvale CA, US
David M. Lowe - Sunnyvale CA, US
Jun Han - Sunnyvale CA, US
Nicholas Ohler - San Leandro CA, US
Daniel M. Giaquinta - Saratoga CA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B01J 29/06

US Classification:

502 66, 502 60, 502 63, 502 64, 502 67, 502 71

Abstract:

Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include at least two zeolites, including a zeolite with a low silica to alumina ratio. The catalysts may be combined with a low surface binder, or alternatively the catalysts as formulated may have a high ratio of zeolite surface area to external surface area.

US Patent:

8263517, Sep 11, 2012

Filed:

Dec 18, 2008

Appl. No.:

12/316978

Inventors:

Christine N. Elia - Bridgewater NJ, US
Mohan Kalyanaraman - Media PA, US
Lei Zhang - Vienna VA, US
Madhav Acharya - Vienna VA, US
Michael A. Daage - Hellertown PA, US
Darden Sinclair - Beaumont TX, US
Jocelyn A. Kowalski - Mullica Hill NJ, US
Jose G. Santiesteban - Hellertown PA, US
Ajit B. Dandekar - Bridgewater NJ, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B01J 29/06

US Classification:

502 64

Abstract:

Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include a zeolite with a low silica to alumina ratio combined with a low surface binder, or alternatively the formulated catalyst has a high ratio of zeolite surface area to external surface area.

US Patent:

8263519, Sep 11, 2012

Filed:

Dec 18, 2008

Appl. No.:

12/316977

Inventors:

Christine N. Elia - Bridgewater NJ, US
Mohan Kalyanaraman - Media PA, US
Michel A. Daage - Hellertown PA, US
Stephen H. Brown - Bernardsville NJ, US
Lei Zhang - Vienna VA, US
Robert A. Crane - Hammonds Plains, CA
Valery Sokolovskii - Sunnyvale CA, US
David M. Lowe - Sunnyvale CA, US
Jun Han - Sunnyvale CA, US
Nicholas Ohler - San Leandro CA, US
Daniel M. Giaquinta - Saratoga CA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

B01J 29/06

US Classification:

502 66

Abstract:

Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include a zeolite with a low silica to alumina ratio combined with a low surface binder, or alternatively the formulated catalyst has a high ratio of zeolite surface area to external surface area.