William Patrick Matthews

US Patent:

7714082, May 11, 2010

Filed:

Oct 4, 2005

Appl. No.:

11/243406

Inventors:

Ping P. Cai - Hurricane WV, US
William A. Matthews - Victoria TX, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 2/00
C08F 210/00

US Classification:

526 68, 526348, 526 59, 526206, 526901

Abstract:

A process for increasing a granular particle density of a polymeric product using at least one particle density promoting agent is described. The process includes passing a gaseous stream comprising at least one monomer through a fluidized bed reactor in the presence of a catalyst to form a polymeric product having a first granular particle density of less than or equal to about 850 kg/m, contacting the polymeric product with at least one particle density promoting agent to increase the granular particle density of the polymeric product by at least 2%, withdrawing the polymeric product having an increased granular particle density and a recycle stream comprised of unreacted monomers, and cooling and reintroducing the recycle stream into the fluidized bed reactor with sufficient additional monomer to replace the monomer polymerized and withdrawn as the polymeric product.

US Patent:

20060130870, Jun 22, 2006

Filed:

Oct 11, 2005

Appl. No.:

11/247372

Inventors:

Ping Cai - Hurricane WV, US
William Matthews - Victoria TX, US

International Classification:

B08B 3/12
B08B 9/00

US Classification:

134001000, 134022100

Abstract:

In some embodiments, a method for sonically cleaning a reactor (for example, a fluidized bed reactor useful for the production of polyolefins) using a set of sonic sources, including by varying the operating mode of the set of sources to reduce or prevent cleaning problems that would otherwise result from weak spots if the operating mode were not so varied. Other embodiments are methods for determining positions and operating parameters (e.g., duty cycle and output acoustic wave frequency) of each source of a set of sonic sources to be used for sonically cleaning a reactor, and methods including the steps of determining a position (relative to a reactor) of each source of a set of sonic sources, positioning each said source in the determined position, and then sonically cleaning a surface of the reactor including by varying the operating mode of the set of sources to reduce or prevent cleaning problems that would otherwise result from weak spots if the operating mode were not so varied.

US Patent:

58440542, Dec 1, 1998

Filed:

Mar 21, 1997

Appl. No.:

8/821528

Inventors:

Paul Kevin Samples - Scott Depot WV
William Albert Matthews - Victoria TX
John Roberts Parrish - Cross Lanes WV
Ivan Jeremy Hartley - St. Albans WV
Kiu Hee Lee - South Charleston WV

International Classification:

C08F 234

US Classification:

526 60

Abstract:

A continuous process for the polymerization of one or more alpha-olefins in the gas phase in the presence of a chromium based catalyst, under polymerization conditions including the reaction temperature, the pressure, and the target oxygen to alpha-olefin molar ratio operating point required for desired resin properties.

US Patent:

20210102016, Apr 8, 2021

Filed:

Dec 16, 2020

Appl. No.:

17/123310

Inventors:

- Houston TX, US
Mark G. Goode - S. Charleston WV, US
Timothy R. Lynn - Middlesex NJ, US
Kevin J. Cann - Tierra Verde FL, US
John H. Moorhouse - Middlesex NJ, US
William Albert Matthews - Hilton Head Island SC, US
Kefu Sun - Freeport TX, US
Francois Alexandre - Saint-Leonard, CA

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 210/02
C08F 210/16
C08F 2/38
C08F 4/69
C08K 3/00
C08K 5/01

Abstract:

Embodiments of the present disclosure are directed towards method for modifying a polymer flow index. As an example, a method for modifying a polymer flow index can include providing monomers to a polymerization reactor, providing a chromium catalyst to the polymerization reactor, and providing an active amount of a flow index modifier to the polymerization reactor, wherein the flow index modifier is selected from carbon dioxide, carbon monoxide, 2,4-hexadiene, and combinations thereof

US Patent:

20210047445, Feb 18, 2021

Filed:

Oct 23, 2020

Appl. No.:

17/078342

Inventors:

- Houston TX, US
Mark G. Goode - S. Charleston WV, US
Francois Alexandre - Saint-Leonard, CA
William A. Matthews - Hilton Head Island SC, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 110/02
C08F 2/34
C08F 4/69

Abstract:

The present disclosure provides for a system and method for producing a polyethylene polymer (PE) that includes measuring a melt flow index (MFI) of the PE, comparing the measured value of the MFI to a predetermined desired range for the MFI, changing a catalyst feed rate to the polymerization reactor based on the compared values of the MFI, where changes in the catalyst feed rate preemptively compensate for subsequent changes in an oxygen flow rate to the polymerization reactor that maintain a predetermined residence time and bring the MFI of the PE into the predetermined desired range for the MFI; and changing the oxygen flow rate to the polymerization reactor thereby maintaining both the predetermined residence time and bringing the MFI of the PE into the predetermined desired range for the MFI. The measuring and comparing steps are repeated to ensure the measured value of the MFI is within the predetermined desired range of the MFI at the predetermined residence time.

US Patent:

20200079886, Mar 12, 2020

Filed:

Nov 27, 2017

Appl. No.:

16/462610

Inventors:

- Houston TX, US
Mark G. Goode - S. Charleston WV, US
Francois Alexandre - Saint-Leonard, CA
William A. Matthews - Hilton Head Island SC, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 110/02
C08F 2/34
C08F 4/69

Abstract:

The present disclosure provides for a system and method for producing a polyethylene polymer (PE) that includes measuring a melt flow index (MFI) of the PE, comparing the measured value of the MFI to a predetermined desired range for the MFI, changing a catalyst feed rate to the polymerization reactor based on the compared values of the MFI, where changes in the catalyst feed rate preemptively compensate for subsequent changes in an oxygen flow rate to the polymerization reactor that maintain a predetermined residence time and bring the MFI of the PE into the predetermined desired range for the MFI; and changing the oxygen flow rate to the polymerization reactor thereby maintaining both the predetermined residence time and bringing the MFI of the PE into the predetermined desired range for the MFI. The measuring and comparing steps are repeated to ensure the measured value of the MFI is within the predetermined desired range of the MFI at the predetermined residence time.