Richard B Pannell, Age 72100 Briar Dr, Liberty, TX 77575

6949612, Sep 27, 2005

Nov 18, 2003

10/715813

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

Univation Technologies, LLC - Houston TX

C08F002/38

526 84, 526 83, 526 86, 526901

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.

6995217, Feb 7, 2006

Jul 28, 2005

11/191585

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

Univation Technologies, LLC - Houston TX

C08F 2/34

526 86, 526 84, 526901

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.

7683140, Mar 23, 2010

Nov 14, 2006

11/599122

Richard B. Pannell - Kingwood TX, US
Robert O. Hagerty - LaPorte TX, US
Eric J. Markel - Kingwood TX, US

Univation Technologies, LLC - Houston TX

C08F 2/00
C08F 10/14

526 61, 526 59, 526 60, 5263485

In some embodiments, a method including the steps of monitoring a polymerization reaction which produces a polymer resin in a fluid bed reactor, where a dry melt reference temperature is characteristic of melting behavior of a dry version of the resin, and in response to data indicative of at least one monitored parameter of the reaction, determining a reduced melt reference temperature that is at least substantially equal to the difference between the dry melt reference temperature and a temperature by which the dry melt reference temperature is depressed by the presence of condensable diluent gas with the resin in the reactor. Optionally, the method also includes the step of controlling the reaction in response to the reduced melt reference temperature or a stickiness parameter determined from the reduced melt reference temperature.

7774178, Aug 10, 2010

Jul 13, 2007

11/827684

Richard B. Pannell - Kingwood TX, US
Robert O. Hagerty - La Porte TX, US
Eric J. Markel - Kingwood TX, US

Univation Technologies, LLC - Houston TX

G06F 17/10

703 2, 526 59

In some embodiments, a method including the steps of: during a polymerization reaction producing a polymer resin in a fluid bed reactor, measuring reaction parameters including at least reactor temperature, at least one property of the resin, and amount of at least one condensable diluent gas in the reactor; determining from at least one measured resin property using a predetermined correlation, a dry melt initiation temperature value for a dry version of the polymer resin; and during the reaction, using a melt initiation temperature depression model to determine in on-line fashion a reduced melt initiation temperature for the resin (e. g. , a temperature at which the resin is expected to begin to melt) in the presence of the at least one condensable diluent gas in the reactor.

7799876, Sep 21, 2010

Jul 13, 2007

11/827685

Eric J. Markel - Kingwood TX, US
Robert O. Hagerty - La Porte TX, US
F. David Hussein - Cross Lanes WV, US
Michael E. Muhle - Kingwood TX, US
Richard B. Pannell - Kingwood TX, US

Univation Technologies, LLC - Houston TX

C08F 2/34
B01J 8/24

526 60, 526 59, 526 74, 526901, 422105

A method for controlling sheeting in a gas phase reactor that includes producing a polyolefin with at least one metallocene catalyst and at least one static control agent in at least one gas phase reactor, measuring entrainment static using a static probe, and adjusting the concentration of the static control agent in response to changes in the measured entrainment static is disclosed.

7910668, Mar 22, 2011

May 5, 2010

12/774084

Michael E. Muhle - Kingwood TX, US
Richard B. Pannell - Kingwood TX, US
Eric J. Markel - Kingwood TX, US
Robert O. Hagerty - La Porte TX, US

Univation Technologies, LLC - Houston TX

C08F 2/36
G01K 11/22
C08F 210/16

526 61, 526 59, 700269, 702 30, 374117, 374E11009

Provided is a method for monitoring a polymerization reaction in a fluid bed reactor to determine in on-line fashion a current value, and preferably also a limiting value, of a stickiness control temperature, and optionally controlling the reaction in response thereto in an effort to prevent occurrence of a discontinuity event. The stickiness control temperature is a temperature indicative of a characteristic of melting behavior of polymer resin in the reactor, and may be indicative of occurrence of resin sheeting or another discontinuity event. Optionally , a predetermined relation between values of acoustic energy in the reactor and values of a stickiness control temperature in used to provide error checking for determination of the stickiness control temperature, or a current value of the stickiness control temperature is determined from acoustic data and a predetermined relation between values of an acoustic condition in the reactor and values of the stickiness control temperature.

7985811, Jul 26, 2011

Jul 10, 2008

12/217945

Robert O. Hagerty - La Porte TX, US
Michael E. Muhle - Kingwood TX, US
Agapios K. Agapiou - Humble TX, US
Chi-I Kuo - Humble TX, US
Mark G. Goode - Hurricane WV, US
F. David Hussein - Cross Lanes WV, US
Richard B. Pannell - Kingwood TX, US
John F. Szul - Hurricane WV, US

Univation Technologies, LLC - Houston TX

C08F 2/34
C08F 2/00
G01R 29/12
B01J 8/18

526 60, 324457, 526 74, 422139

Embodiments of the present invention relate to measuring and controlling static in a gas phase reactor polymerization. In particular, embodiments relate to monitoring carryover static in an entrainment zone during gas phase polymerization to determine the onset of reactor discontinuity events such as chunking and sheeting. Embodiments also relate to monitoring carryover static to determine the need for effective additions of continuity additives that minimize reactor static activity and thereby preventing discontinuity events.

8039562, Oct 18, 2011

Jan 29, 2009

12/322143

Richard B. Pannell - Kingwood TX, US
Eric J. Markel - Kingwood TX, US
Agapios K. Agapiou - Humble TX, US

Univation Technologies, LLC - Houston TX

C08F 2/00
C08F 210/00

526 64, 526 74, 526348, 526 89

In some embodiments, a method in which at least one continuity additive (“CA”) and a seed bed are pre-loaded into a reactor, and a polymerization reaction is optionally then performed in the reactor. In other embodiments, at least one flow improver, at least one CA, and a seed bed are pre-loaded into a reactor. Pre-loading of a reactor with a CA can significantly improve continuity of a subsequent polymerization reaction in the reactor during its initial stages, including by reducing sheeting and fouling. The CA can be pre-loaded in dry form (e. g. , as a powder), or in liquid or slurry form (e. g. , as an oil slurry). To aid delivery of a dry CA to the reactor and combination of the dry CA with a seed bed in the reactor, the dry CA can be combined with a flow improver and the combination of CA and flow improver then loaded into the reactor. Alternatively, the CA and flow improver can be sequentially loaded into the reactor, and then mixed together (and mixed with a seed bed) in the reactor after both the CA and flow improver have been separately loaded into the reactor.