Michael E Muhle

US Patent:

6476171, Nov 5, 2002

Filed:

Oct 3, 2000

Appl. No.:

09/677756

Inventors:

Ching-Tai Lue - Houston TX
Natalie A. Merrill - Houston TX
Michael E. Muhle - Kingwood TX
George Alan Vaughan - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F 442

US Classification:

526348, 526943, 526901, 526 88, 5263402, 5263482, 5263481, 526 68, 526 69

Abstract:

A polymer of ethylene and at least one alpha olefin having at least 5, carbon atoms obtainable by a continuous gas phase polymerization using supported catalyst of an activated molecularly discrete catalyst such as a metallocene in the substantial absence of an aluminum alkyl based scavenger which polymer has a Melt Index (MI) as herein defined of from 0. 1 to 15; a Compositional Distribution Breadth Index (CDBI) as defined herein of at least 70%, a density of from 0. 910 to 0. 930 g/ml; a Haze value as herein defined of less than 20%; a Melt Index ratio (MIR) as herein defined of from 35 to 80; an averaged Modulus (M) as herein defined of from 20 000 to 60 000 psi (pounds per square inch) and a relation between M and the Dart Impact Strength in g/mil (DIS) complying with the formula:.

US Patent:

6753390, Jun 22, 2004

Filed:

Feb 18, 2003

Appl. No.:

10/368786

Inventors:

Fred David Ehrman - Houston TX
Michael Elroy Muhle - Kingwood TX
Pradeep Pandurang Shirodkar - Kingwood TX
Keith Wesley Trapp - Houston TX

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 234

US Classification:

526113, 526 92, 526114, 526118, 526119, 526901, 526905

Abstract:

A gas phase polymerization process for producing a polyolefin composition is described, which includes passing a gaseous stream containing hydrogen gas and one or more monomers, including ethylene monomers, through a reactor that includes a fluidized bed, under reactive conditions, in the presence of a catalyst that includes metallocene, to provide a polyolefin composition, wherein in one embodiment the fluidized bulk density is 60% or more of the settled bulk density (or, a voidage of 40% or less); and wherein the voidage is controlled by a number of factors including, in certain embodiments, (a) the reactor temperature being maintained at 100Â C. or below; (b) the molar ratio of hydrogen gas to ethylene introduced into the reactor being 0. 015 or below.

US Patent:

6831140, Dec 14, 2004

Filed:

Nov 20, 2003

Appl. No.:

10/717820

Inventors:

Michael Elroy Muhle - Kingwood TX
Robert Olds Hagerty - La Porte TX
John Francis Szul - Hurricane WV
Mark Gregory Goode - Hurricane WV
Laurence G. Britton - Charleston WV

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 234

US Classification:

526 74, 526901, 422139, 423302

Abstract:

The invention relates to a method for evaluating the condition of a fluidized bed reactor by examining the condition of the reactor wall. Specifically, the invention relates to a method for measuring static in the reactor using a static probe that is located at the distributor plate and comprises a distributor plate cap. The invention also relates to methods of determining a static level using a radio frequency (rf). The static measurements are provided to indicate or predict major continuity disturbances in the fluidized bed gas phase reactor.

US Patent:

6858684, Feb 22, 2005

Filed:

Nov 17, 2003

Appl. No.:

10/716041

Inventors:

Ian D. Burdett - Charleston WV, US
Ping P. Cai - Hurricane WV, US
Ronald Steven Eisinger - Charleston WV, US
Mark Gregory Goode - Hurricane WV, US
F. David Hussein - Cross Lanes WV, US
Michael Allen Kinnan - Charleston WV, US
Michael Elroy Muhle - Kingwood TX, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F002/34

US Classification:

526 86, 526 83, 526 88, 526901

Abstract:

This invention relates to processes for transitioning among polymerization catalyst systems, preferably catalyst systems, which are incompatible with each other. Particularly, the invention relates to processes for transitioning among olefin polymerization reactions utilizing Ziegler-Natta catalyst systems, metallocene catalyst systems and chromium-based catalyst systems.

US Patent:

6870023, Mar 22, 2005

Filed:

Aug 28, 2003

Appl. No.:

10/651135

Inventors:

Michael E. Muhle - Kingwood TX, US
Porter C. Shannon - Seabrook TX, US
Fred D. Ehrman - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F210/00

US Classification:

526348, 422139, 427230, 427236, 427237

Abstract:

Reactor wall coatings for polymerization reactors and processes for forming such coatings are disclosed. The reactor wall coatings can have a thickness of at least 100 μm and a molecular weight distribution including a major peak having one or more of an Mw/Mn ratio of less than 10; an Mz/Mw ratio of less than 7; and a maximum value of d(wt %)/d(log MW) at less than 25,000 daltons in a plot of d(wt %)/d(log MW), where MW is the molecular weight in daltons. The reactor wall coatings can be formed in-situ during polymerization, on reactor walls initially free of a reactor wall coating, or having a pre-existing reactor wall coating.

US Patent:

6914027, Jul 5, 2005

Filed:

Dec 1, 2000

Appl. No.:

09/728267

Inventors:

Brant Patrick - Seabrook TX, US
Michael Elroy Muhle - Kingwood TX, US
Matt Kuchta - Houston TX, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

B01J031/00
B01J037/00
C08F004/02
C08F004/60

US Classification:

502117, 502150, 568374, 568454

Abstract:

The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.

US Patent:

6949612, Sep 27, 2005

Filed:

Nov 18, 2003

Appl. No.:

10/715813

Inventors:

Agapios Kyriacos Agapiou - Humble TX, US
Robert Olds Hagerty - La Porte TX, US
F. David Hussein - Cross Lanes WV, US
Michael Elroy Muhle - Kingwood TX, US
Richard B. Pannell - Kingwood TX, US
Kathryn Ann Russell - Seabrook TX, US
Robert Lynn Santana - Baytown TX, US
X. Simon Zhang - London, GB

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F002/38

US Classification:

526 84, 526 83, 526 86, 526901

Abstract:

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.

US Patent:

6995217, Feb 7, 2006

Filed:

Jul 28, 2005

Appl. No.:

11/191585

Inventors:

Agapios Kyriacos Agapiou - Humble TX, US
Robert Olds Hagerty - La Porte TX, US
F. David Hussein - Cross Lanes WV, US
Michael Elroy Muhle - Kingwood TX, US
Richard B. Pannell - Kingwood TX, US
Kathryn Ann Russell - Seabrook TX, US
Robert Lynn Santana - Baytown TX, US
X. Simon Zhang - London, GB

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 2/34

US Classification:

526 86, 526 84, 526901

Abstract:

Processes for transitioning among polymerization catalyst systems, preferably catalyst systems that are incompatible with each other. In particular, the processes relate to transitioning from olefin polymerizations utilizing metallocene catalyst systems to olefin polymerizations utilizing traditional Ziegler-Natta catalyst systems.