Lei L Zhang

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:

7914665, Mar 29, 2011

Filed:

Nov 14, 2005

Appl. No.:

11/667236

Inventors:

Lei Zhang - Vienna VA, US
Elizabeth Stavens - Seabrook TX, US
Lisa I-Ching Yeh - Marlton NJ, US
Ian A. Cody - Annandale NJ, US
William J. Murphy - Baton Rouge LA, US
Thomas R. Palmer - Bethlehem PA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10G 29/20
C10G 47/02

US Classification:

208 28, 208 33, 208 36, 208108, 208 27

Abstract:

The invention relates to a process for preparing lube oil basestocks from lube oil boiling range feeds. More particularly, the present invention is directed toward a process wherein a wax containing feed is solvent dewaxed to produce at least a partially dewaxed lube oil boiling range stream, which is hydrodewaxed to produce a first lube basestock. The first lube basestock is added to an independently selected second lube basestock and additives to make a lubricating oil.

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.

US Patent:

8366908, Feb 5, 2013

Filed:

Dec 23, 2009

Appl. No.:

12/655120

Inventors:

Krista Marie Prentice - Bethlehem PA, US
Gary Paul Schleicher - Milford NJ, US
Lei Zhang - Vienna VA, US
Timothy Lee Hilbert - Fairfax VA, US
Michel A. Daage - Hellertown PA, US
Sylvain Hantzer - Purcellville VA, US
Wenyih F. Lai - Bridgewater NJ, US
David Mentzer - Marshall VA, US
William Francis Heaney - Bonita Springs FL, US
Christine Nicole Elia - Bridgewater NJ, US
Shifang Luo - Kingwood TX, US
Stephen J. McCarthy - Center Valley PA, US
Mohan Kalyanaraman - Media PA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10G 73/02
C10G 73/38
C10G 45/58
C10G 45/64

US Classification:

208 28, 208 27, 208 57, 208264

Abstract:

An integrated process for producing lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants, or a high pressure separation can be used to partially eliminate contaminants.

US Patent:

20080171675, Jul 17, 2008

Filed:

May 26, 2006

Appl. No.:

11/667237

Inventors:

Lisa Ching Yeh - Marlton NJ, US
Elizabeth Stavens - Seabrook TX, US
Robert R. Palmer - Bethlehem PA, US
Michael Lacey - Pearland TX, US
Lei Zhang - Vienna VA, US

International Classification:

C10M 101/02
C10M 105/02

US Classification:

508110, 208 18

Abstract:

This invention relates to basestocks and base oils with improved low temperature properties and formulated lubricant compositions or functional fluids created by blending at least one such lube basestock with at least one component selected from dispersants, detergents, wear inhibitors, antioxidants, rust inhibitors, demulsifiers, extreme pressure agents, friction modifiers, multifunction additives, viscosity index improvers, pour point depressants, and foam inhibitors. In particular the invention relates to dewaxed lube basestocks having a Free Carbon Index of less than 4.3 and an Epsilon Carbon mole % of less than 14%. Formulated engine oils using such dewaxed basestocks exhibit improved low temperature properties as may be measured by the Mini Rotary Viscometer test.