Metal Oxide Is Of Chromium Patents (Class 526/106)
  • Patent number: 10646845
    Abstract: A system and method for a first reactor to produce a transfer slurry having a first polyolefin polymerized in the first reactor, a heat-removal zone to remove heat from the transfer slurry, and a second reactor to receive the transfer slurry cooled by the heat-removal zone, the second reactor to produce a product slurry having a product polyolefin which includes the first polyolefin and a second polyolefin polymerized in the second reactor.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: May 12, 2020
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Maruti Bhandarkar, Elizabeth A Benham, Rebecca A. Gonzales, Joel A Mutchler, Catherine M. Gill, Timothy O. Odi, Thanh T. Nguyen, Scott E. Kufeld
  • Patent number: 10259893
    Abstract: Methods for reinforcing chromium catalysts by the deposition of additional silica are disclosed herein. The resultant silica-reinforced chromium supported catalysts can be used to polymerize olefins to produce, for example, ethylene based homopolymers and copolymers with higher molecular weights and additional long chain branching.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: April 16, 2019
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Stephen L. Kelly
  • Patent number: 10233270
    Abstract: Catalyst systems and methods for making and using the same. A method for making a catalyst support includes forming a mixture of a support material and a fluoride donor. The mixture is added to a fluidized bed reactor. The mixture is fluidized to form a fluidized bed while maintaining a flow rate of a fluidizing gas of about 0.1 ft./sec at less than about 370° C. and greater than about 0.35 ft./sec at temperatures greater than about 370° C. The mixture is calcined to decompose the fluoride donor, forming a fluorinated support.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: March 19, 2019
    Assignee: Univation Technologies, LLC
    Inventors: John H. Moorhouse, Kevin J. Cann, Phuong A. Cao, Mark G. Goode, C. Jeff Harlan, Wesley R. Mariott
  • Patent number: 10208139
    Abstract: Catalyst systems and methods for making and using the same. A method for making a catalyst support includes forming a mixture of a support material and a fluoride donor. The mixture is added to a fluidized bed reactor. The mixture is fluidized to form a fluidized bed while maintaining a ratio of a pressure drop across a distributor plate to a pressure drop across the fluidized bed of greater than about 7%. The mixture is calcined to decompose the fluoride donor, forming a fluorinated support.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: February 19, 2019
    Assignee: Univation Technologies, LLC
    Inventors: John H. Moorhouse, Kevin J. Cann, Phuong A. Cao, Mark G. Goode, C. Jeff Harlan, Wesley R. Mariott
  • Patent number: 10189917
    Abstract: Catalyst systems and methods for making and using the same. A method for making a catalyst support includes forming a mixture of a support material and a fluoride donor. The mixture is added to a fluidized bed reactor. The mixture is fluidized to form a fluidized bed with a height to diameter ratio of at least about 2.3. The mixture is calcined to decompose the fluoride donor, forming a fluorinated support.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: January 29, 2019
    Assignee: Univation Technologies, LLC
    Inventors: John H. Moorhouse, Kevin J. Cann, Phuong A. Cao, Mark G. Goode, C. Jeff Harlan, Wesley R. Mariott
  • Patent number: 10118998
    Abstract: Processes for producing an (ultra) high molecular weight polyethylene (HMWPE) article include incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-linking the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: November 6, 2018
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin Van Duin
  • Patent number: 9694336
    Abstract: A method for controlling the temperature in a polymerization reactor equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger, which is cooled by a cooling medium, which is conveyed in a cooling system through the heat-exchanger, and feeding the reactor gas back to the reactor by adjusting the temperature of the cooling medium entering the heat exchanger, wherein the temperature of the cooling medium entering the heat exchanger is controlled by adjusting the flow rate of the cooling medium in a part of the cooling system by a flow control system comprising two continuously operating flow control devices of different size, which are connected in parallel, a process for polymerizing olefins and a process for controlling the flow rate of a fluid medium.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: July 4, 2017
    Assignee: Basell Polyolefine GmbH
    Inventors: Holger Strecker, Manfred Hecker, Rainer Karer, Axel Hamann, Paulus-Petrus Maria De Lange
  • Patent number: 9540727
    Abstract: A cleaning method includes: providing a process container in which a process of forming a film on a substrate is performed; and removing a deposit including the film adhered to the process container by supplying a cleaning gas into the process container after performing the process. The act of removing the deposit includes generating a mixture gas of a fluorine-containing gas and a nitrosyl fluoride gas as the cleaning gas by mixture and reaction of the fluorine-containing gas and a nitrogen monoxide gas in a mixture part and supplying the mixture gas from the mixture part into the process container after removing exothermic energy generated by the reaction.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: January 10, 2017
    Assignee: HITACHI KOKUSAI ELECTRIC, INC.
    Inventors: Kenji Kameda, Jun Sonobe, Yudai Tadaki
  • Patent number: 9433914
    Abstract: A system and method for polymerizing olefin in a gas phase reactor into a polyolefin in presence of catalyst, measuring static charge in the reactor system; determining an indication of polyolefin fines in the reactor system, and adjusting operation of the reactor system in response to the indication.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: September 6, 2016
    Assignee: Chevron Phillips Chemical Company, LP
    Inventors: Gregory G. Hendrickson, Leonard E. Powell, Michael A. Rhodes, Joel Mutchler, Bruce E. Kreischer, Maruti Bhandarker, Rebecca A. Gonzales, Bruce H. Marantis
  • Patent number: 9334336
    Abstract: A system and method for a gas phase reactor to polymerize olefin into a polyolefin, and for a solids recovery system to separate solids from overhead gas discharged from the gas phase reactor and to return the solids to the gas phase reactor. A control system may perform a fluid flow calculation of the solids recovery system. The solids recovery system may employ a vertical motive device and/or horizontal motive device.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: May 10, 2016
    Assignee: Chevron Phillips Chemical Company, LP
    Inventor: Gregory G. Hendrickson
  • Patent number: 9290629
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising: incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: March 22, 2016
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin Van Duin
  • Patent number: 9238719
    Abstract: The invention relates to a process for producing an (ultra) high molecular weight polyethylene (HMWPE) article comprising:—incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and—cross-link the (U)HMWPE during or after molding the (U)HMWPE resin.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: January 19, 2016
    Assignee: DSM IP ASSETS B.V.
    Inventors: Harold Jan Smelt, Pieter Gijsman, Martin van Duin
  • Patent number: 9012564
    Abstract: A film containing an interpolymer of ethylene and a 3-substituted C4-10 alkene is prepared using a catalyst system comprising a Ziegler Natta or chromium oxide catalyst.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: April 21, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Ted M Pettijohn, Michael Grass, Stefan Buchholz, Gerhard Ellermann, Anne Britt Bjaland, Arild Follestad, Jarmo Lindroos
  • Patent number: 9006363
    Abstract: Process for the activation of a supported chromium oxide based catalyst in a fluidized bed activation reactor which has a catalyst bed being fluidized by a fluidization gas. The activation includes treatment at temperatures above 500° C., in which in an initial stage, where there is an initial temperature increase, the fluidization velocity (Vf1) of the fluidization gas is maintained below 6.5 centimeters per second (cm/sec) until the temperature inside the activation reactor reaches at least 200° C., and the fluidization gas is then brought to a value (Vf2) which is at least 1 cm/sec higher than Vf1.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: April 14, 2015
    Assignee: Ineos Sales (UK) Limited
    Inventors: Christophe Moineau, Stephan Detournay
  • Patent number: 8981021
    Abstract: Various methods and systems for using oxygen in a polyolefin polymerization reactor system are provided. In certain embodiments, the methods are performed in conjunction with a polymerization reactor system such as a gas-phase reactor system.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: March 17, 2015
    Assignee: Univation Technologies, LLC
    Inventors: Ronald S. Eisinger, Mark G. Goode
  • Patent number: 8921251
    Abstract: The invention relates to the field of producing polymers and copolymers of olefin oligomers produced by a trimerization reaction of olefin monomers. There is disclosed a process which comprises producing olefin oligomers with the aid of a trimerization catalyst system prepared using UHF irradiation for activating individual components of the trimerization catalyst system. The use of the trimerization catalyst system thus improved and having increased activity provides for increased effectiveness in the production of olefin oligomers from ethylene or other olefin monomers, inter alia, at a low pressure of ethylene. The olefin oligomers thus produced are then polymerized or copolymerized using processes known in the art. The technical effect consists in increasing the effectiveness of the production of olefin oligomers which are then used in a polymerization or copolymerization reaction.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: December 30, 2014
    Assignee: Open Joint Stock Company “Sibur Holding”
    Inventors: Timur Mikhailovich Zilbershtein, Maxim Vladimirovich Lipskikh, Alexei Alexandrovich Nosikov, Georgy Viktorovich Nesyn
  • Patent number: 8846834
    Abstract: Mineral oil is added to a supported chromium catalyst in amounts which maintain a free flowing particulate material. Chromium catalysts so treated, provide polyethylene in a gas phase ethylene polymerization process with reduced reactor fouling or static.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: September 30, 2014
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Patrick Drew Evans
  • Patent number: 8697599
    Abstract: A method comprising (a) contacting a support and a chromium-containing compound to form chromium-containing support, (b) heat treating the chromium-containing support in an oxidizing atmosphere to form a treated support, (c) contacting the treated support with carbon monoxide to form a CO-contacted support, and (d) contacting the CO-contacted support with hydrogen to form a catalyst. A method comprising oxidizing a chromium-treated support to form a polymerization catalyst, contacting the polymerization catalyst with carbon monoxide to form a reduced polymerization catalyst, contacting the reduced polymerization catalyst with hydrogen to form an activated polymerization catalyst, and contacting the activated polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form a random copolymer.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: April 15, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Kathy S. Collins, Stephen M. Wharry
  • Patent number: 8653208
    Abstract: A process for preparing a catalyst, and catalysts prepared thereby. The process includes selecting a catalyst support and mixing it with one or more chromium containing compounds oxidizable to a Cr+6 state or already in a Cr+6 state, and with one or more transition metal catalyst component, and calcining the catalyst support while oxidizing any chromium containing compound to a Cr+6 state, and spray drying the catalyst support to form catalyst particles. The catalyst supports are characterized by a surface area greater than 50 m2/gram and a pore volume greater than 0.5 cc/gram at the time of mixing the catalyst support with the chromium containing compound.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: February 18, 2014
    Assignee: Union Carbide Chemicals & Plastics Technology LLC
    Inventor: Robert James Jorgensen
  • Patent number: 8604142
    Abstract: An alkene interpolymer is prepared by polymerizing at least one 3-substituted C4-10 alkene and at least one C2-8 alkene in a gas phase polymerization using a polymerization catalyst system.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: December 10, 2013
    Assignee: Evonik Oxeno GmbH
    Inventors: Michael Grass, Ted Pettijohn, Stefan Buchholz, Gerhard Ellermann, Pal Bentzrod, Tore Dreng, Jarmo Lindroos
  • Publication number: 20130310526
    Abstract: A process for preparing a catalyst, and catalysts prepared thereby. The process includes selecting a catalyst support and mixing it with one or more chromium containing compounds oxidizable to a Cr+6 state or already in a Cr+6 state, and with with one or more transition metal catalyst component, and calcining the catalyst support while oxidizing any chromium containing compound to a Cr+6 state, and spray drying the catalyst support to form catalyst particles. The catalyst supports are characterized by a surface area greater than 50 m2/gram and a pore volume greater than 0.5 cc/gram at the time of mixing the catalyst support gels with the chromium containing compound.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 21, 2013
    Applicant: UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY LLC
    Inventor: Robert James Jorgensen
  • Publication number: 20130245209
    Abstract: Method for activation of chromium containing catalyst precursor for polymerization and improved polymerization catalyst resulting The instant invention relates to an activation of a polymerization catalyst precursor by heat treatment comprising a support material and a catalyst precursor deposited thereon in a fluidized bed activator and to the use of the activated polymerization catalyst in the manufacture of polyolefins. The Method is performed in a cylindrical activator (1) arranged vertically comprising tubular activator walls, a fluidization gas inlet (2) near the bottom, a fluidization gas outlet (3) near the top and a heat exchange jacket (4) outside the tubular activator walls, wherein the heating jacket covers the complete outer surface of the walls of the activator. The catalyst prepared by that method is improved with respect to its minor content of impurities and causes less interruptions during gas-phase polymerization or slurry polymerization either in stirred vessel or loop.
    Type: Application
    Filed: November 29, 2011
    Publication date: September 19, 2013
    Applicant: Basell Polyolefine GmbH
    Inventors: Paulus De Lange, Manfred Hecker
  • Publication number: 20130216835
    Abstract: The present invention relates to a chromium catalysed ethylene copolymer powder exhibiting a superior fragmentation coefficient.
    Type: Application
    Filed: October 5, 2011
    Publication date: August 22, 2013
    Applicant: INEOS COMMERCIAL SERVICES UK LIMITED
    Inventors: Christophe Moineau, Stephan Detournay, Pierre Mangin, Julie Bigeault
  • Publication number: 20130203947
    Abstract: The present invention relates to a process for the activation of a supported chromium oxide based catalyst.
    Type: Application
    Filed: October 5, 2011
    Publication date: August 8, 2013
    Applicant: INEOS COMMERCIAL SERVICES UK LIMITED
    Inventors: Christophe Moineau, Stephan Detournay
  • Publication number: 20130175211
    Abstract: Systems and methods for the maintenance of active chromium-based catalysts and their use in polymerization processes are described. In one embodiment, a system for the introduction of multiple polymerization components to activate a chromium based catalyst within a mix tank is described. Other described features may include materials and methods to purify the liquid medium of a catalyst slurry so that the catalyst slurry maintains a high level of activity. The active chromium-based catalyst may provide polyolefins with a number of desirable properties in a reliable, consistent, and predictable manner.
    Type: Application
    Filed: March 1, 2013
    Publication date: July 11, 2013
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventor: Chevron Phillips Chemical Company LP
  • Publication number: 20130090437
    Abstract: A process for preparation of silica xerogel catalyst support particles having high surface areas involves ageing a silica hydrogel at a pH from 3 to 5 and at a temperature of 45° C. or more. The ageing at low pH leads to a silica gel which may be converted to a xerogel having a pore volume of 1.5 cm3/g or more and a surface area of 600 m2/g or more by removal of liquid from the pore structure by solvent exchange with a liquid solvent having a surface tension of 35 mN/m or less. The resulting particles are useful for carrying catalyst metal compounds, such as a chromium compounds, in the pore structure to act as catalyst precursors. These catalyst precursors may be activated into porous catalyst particles suitable for use for olefin polymerisation to provide high activity and for forming high molecular weight polymers (low MI polymers) with good crack resistance.
    Type: Application
    Filed: June 23, 2011
    Publication date: April 11, 2013
    Applicant: PQ CORPORATION
    Inventors: Parag Rasiklal Shah, Yatao Rachel Hu, Myoung Kie Lee
  • Patent number: 8399580
    Abstract: Systems and methods for the maintenance of active chromium-based catalysts and their use in polymerization processes are described. In one embodiment, a system for the introduction of multiple polymerization components to activate a chromium based catalyst within a mix tank is described. Other described features may include materials and methods to purify the liquid medium of a catalyst slurry so that the catalyst slurry maintains a high level of activity. The active chromium-based catalyst may provide polyolefins with a number of desirable properties in a reliable, consistent, and predictable manner.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: March 19, 2013
    Assignee: Chevron Philips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Kathy S. Collins
  • Patent number: 8372771
    Abstract: A system and method for activating chromium catalyst, including: increasing temperature of a chromium catalyst at a first rate for a first period of time to a first temperature; and increasing temperature of the chromium catalyst at a second rate for a second period of time from the first temperature to a second temperature, wherein the first rate is greater than the second rate, and wherein the first period precedes the second period.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: February 12, 2013
    Assignee: Chevrton Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel
  • Publication number: 20120238714
    Abstract: The present invention relates to a process for polymerisation of olefins, in particular gas phase polymerisation of olefins, with the aid of a supported chromium oxide based catalyst.
    Type: Application
    Filed: November 1, 2010
    Publication date: September 20, 2012
    Applicant: INEOS COMMERCIAL SERVICES UK LIMITED
    Inventors: Stephan Detournay, Christophe Moineau
  • Patent number: 8268943
    Abstract: A process for the preparation of a chromium-type supported olefin polymerization catalyst. A fluidized bed of support particles in an inert carrier gas is established. A chromium (III) compound is added to the fluidized support particles to provide a supported catalyst component. The supported catalyst component is activated to convert at least a portion of the chromium (III) to Chromium (VI). The chromium (III) containing particles may be recovered from the fluidized bed and then activated or they may be activated in the fluidized bed. Also the support particles can be treated in the fluidized bed with other treatment agents. The support particles may be pretreated with a solution of a boron treating agent prior to incorporation of the support in the fluidized bed.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: September 18, 2012
    Assignee: Fina Technology, Inc.
    Inventors: Ricky McCormick, David Knoeppel
  • Patent number: 8258246
    Abstract: A process for the preparation of a chromium-type supported olefin polymerization catalyst. A fluidized bed of support particles in an inert carrier gas is established. A chromium (III) compound is added to the fluidized support particles to provide a supported catalyst component. The supported catalyst component is activated to convert at least a portion of the chromium (III) to Chromium (VI). The chromium (III) containing particles may be recovered from the fluidized bed and then activated or they may be activated in the fluidized bed. Also the support particles can be treated in the fluidized bed with other treatment agents. The support particles may be pretreated with a solution of a boron treating agent prior to incorporation of the support in the fluidized bed.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: September 4, 2012
    Assignee: Fina Technology, Inc.
    Inventors: Ricky McCormick, David Knoeppel
  • Patent number: 8211988
    Abstract: A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, and activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst. A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst, and contacting the polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form polyethylene wherein the molecular weight distribution of the polyethylene is broadened.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: July 3, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Kathy S. Collins
  • Patent number: 8202952
    Abstract: A process for making an ethylene homopolymer in the presence of an oxide-supported chromium catalyst is disclosed. A small amount of an ?-olefin contacted with the catalyst before polymerizing ethylene or introduced into an ethylene homopolymerization unexpectedly boosts process productivity. When used at part per million levels, the ?-olefin improves productivity while maintaining desirable polymer properties. The invention is particularly valuable for making HDPE resins useful for blow molding applications.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: June 19, 2012
    Assignee: Equistar Chemicals, LP
    Inventors: Michael W. Lynch, Mark K. Reinking
  • Patent number: 8192690
    Abstract: A method of treating a gas phase fluidized bed reactor and a method of polymerizing olefins in a gas phase fluidized bed reactor in the presence of a catalyst prone to cause sheeting by introducing a chromium-containing compound into the reactor and forming a high molecular weight polymer coating on the walls of the reactor. Furthermore, a device for and method of introducing the chromium-containing compound into the fluidized bed reactor at a plurality of locations in proximity to a lower section of a bed section wall of the fluidized bed reactor, and forming a high molecular weight polymer coating on the bed section wall.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: June 5, 2012
    Assignee: Univation Technologies, LLC
    Inventors: Agapios K. Agapiou, David M. Glowczwski, Zerong Lin, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Kevin B. Stavens, Keith W. Trapp, Michael E. Muhle, F. David Hussein
  • Patent number: 8183173
    Abstract: A method of preparing a catalyst comprising aging a silica support in an alkaline solution to produce an alkaline aged silica support, removing at least a portion of the alkaline solution from the alkaline aged silica support to produce a dried silica support, and activating the silica support to produce a catalyst composition, wherein alkaline aging lowers the surface area of the silica support to less than about 50% of the original value and wherein activation of the silica support is carried out in batches of equal to or greater than about 500 lbs for a time period of less than about 8 hours.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: May 22, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Elizabeth A. Benham, Ted Cymbaluk, George Neil
  • Publication number: 20120041160
    Abstract: Systems and methods for the maintenance of active chromium-based catalysts and their use in polymerization processes are described. In one embodiment, a system for the introduction of multiple polymerization components to activate a chromium based catalyst within a mix tank is described. Other described features may include materials and methods to purify the liquid medium of a catalyst slurry so that the catalyst slurry maintains a high level of activity. The active chromium-based catalyst may provide polyolefins with a number of desirable properties in a reliable, consistent, and predictable manner.
    Type: Application
    Filed: August 11, 2010
    Publication date: February 16, 2012
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Kathy S. Collins
  • Publication number: 20120022208
    Abstract: A film containing an interpolymer of ethylene and a 3-substituted C4-10 alkene is prepared using a catalyst system comprising a Ziegler Natta or chromium oxide catalyst.
    Type: Application
    Filed: January 12, 2010
    Publication date: January 26, 2012
    Applicant: EVONIK OXENO GMBH
    Inventors: Ted M. Pettijohn, Michael Grass, Stefan Buchholz, Gerhard Ellermann, Anne Brit Bjaland, Arild Follestad, Jarmo Lindroos
  • Publication number: 20120022223
    Abstract: An alkene interpolymer is prepared by polymerizing at least one 3-substituted C4-10 alkene and at least one C2-8 alkene in a gas phase polymerization using a polymerization catalyst system.
    Type: Application
    Filed: January 12, 2010
    Publication date: January 26, 2012
    Applicant: Evonik Oxeno GmbH
    Inventors: Michael Grass, Ted Pettijohn, Stefan Buchholz, Gerhard Ellermann, Pal Bentzrod, Tore Dreng, Jarmo Lindroos
  • Patent number: 8084554
    Abstract: A method of treating a gas phase fluidized bed reactor and a method of polymerizing olefins in a gas phase fluidized bed reactor in the presence of a catalyst prone to cause sheeting by introducing a chromium-containing compound into the reactor and forming a high molecular weight polymer coating on the walls of the reactor. Furthermore, a device for and method of introducing the chromium-containing compound into the fluidized bed reactor at a plurality of locations in proximity to a lower section of a bed section wall of the fluidized bed reactor, and forming a high molecular weight polymer coating on the bed section wall.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: December 27, 2011
    Assignee: Univation Technologies, LLC
    Inventors: Agapios K. Agapiou, David M. Glowczwski, Zerong Lin, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Kevin B. Stavens, Keith W. Trapp, Michael E. Muhle, F. David Hussein
  • Publication number: 20110313116
    Abstract: Ethylene polymerization processes and polymers formed from the same are discussed herein. The ethylene polymerization processes generally include introducing ethylene monomer into a polymerization reaction zone; introducing a chromium oxide based catalyst into the polymerization reaction zone; introducing a quantity of hydrogen into the polymerization reaction zone; and contacting the ethylene monomer with the chromium oxide based catalyst in the polymerization reaction zone in the presence of hydrogen to form polyethylene, wherein the polyethylene formed in the presence of hydrogen exhibits an MI2 that increases with an increasing quantity of hydrogen and a molecular weight and molecular weight distribution that remains essentially constant with an increasing quantity of hydrogen.
    Type: Application
    Filed: June 17, 2010
    Publication date: December 22, 2011
    Applicant: Fina Technology, Inc.
    Inventor: David Knoeppel
  • Patent number: 8076262
    Abstract: Broad molecular weight polyethylene and polyethylene having a bimodal molecular weight profile can be produced with chromium oxide based catalyst systems employing alkyl silanols. The systems may also contain various organoaluminum compounds. Catalyst activity and molecular weight of the resulting polyethylene may also be tuned using the present invention.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: December 13, 2011
    Assignee: Univation Technologies, LLC
    Inventors: Kevin J. Cann, Minghui Zhang, John H. Moorhouse, Maria A. Apecetche
  • Patent number: 8017713
    Abstract: An apparatus of a polycarbonate resin having polymerization tanks is provided. In supplying a molten reactant to a liquid phase in a polymerization tank, or supplying the molten reactant to a gas phase in the polymerization tank by an insertion pipe, in at least one polymerization tank, and/or producing a polycarbonate resin by an ester exchange reaction between an aromatic dihydroxy compound and a carbonic diester by using three vertical polymerization tanks and one horizontal polymerization tank, a wall surface temperature T of a distillation pipe is set higher than a boiling point t1 of by-produced phenol such that the relationship of the boiling point t1 of the by-produced phenol under a pressure in at least a third vertical polymerization tank, the wall surface temperature T of the distillation pipe and an inner temperature t2 of the third vertical polymerization tank satisfies t1<T?t2.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: September 13, 2011
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kazuyuki Takahashi, Ryuuji Uchimura, Toshiyuki Hamano, Masaaki Miyamoto, Kodama Miyamoto, legal representative, Taro Miyamoto, legal representative, Hideo Miyamoto, legal representative, Hanae Miyamoto, legal representative
  • Publication number: 20110201769
    Abstract: Ethylene copolymers composed of ethylene units and units composed of at least one other 1-olefin whose density is from 0.940 to 0.955 g/cm3, whose vinyl end group content is at least 0.5 end groups, based on 1000 carbon atoms, whose tensile impact strength atn, measured to ISO 8256 (1997)/1A at ?30° C., is greater than or equal to 145 kJ/m2, and whose content of comonomer side chains per 1000 carbon atoms Cx is above a value defined via equation I, Cx=128.7?134.62 d? (I), where d? is the density d of the copolymer in g/cm3, and a process for their preparation, and their use as blow-molded products.
    Type: Application
    Filed: January 24, 2007
    Publication date: August 18, 2011
    Inventors: Chistoph Kiener, Rainer Karer, Jens Wiesecke, Gerhardus Meier
  • Patent number: 7910669
    Abstract: A method comprising (a) contacting a support and a chromium-containing compound to form chromium-containing support, (b) heat treating the chromium-containing support in an oxidizing atmosphere to form a treated support, (c) contacting the treated support with carbon monoxide to form a CO-contacted support, and (d) contacting the CO-contacted support with hydrogen to form a catalyst. A method comprising oxidizing a chromium-treated support to form a polymerization catalyst, contacting the polymerization catalyst with carbon monoxide to form a reduced polymerization catalyst, contacting the reduced polymerization catalyst with hydrogen to form an activated polymerization catalyst, and contacting the activated polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form a random copolymer.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: March 22, 2011
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Kathy S. Collins, Stephen M. Wharry
  • Patent number: 7906603
    Abstract: Methods of polymerizing at least one olefin include contacting the olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound. The polymerization may be performed in the presence of hydrogen. Using the cocatalyst in conjunction with the catalyst increases several properties, such as the high load melt index (HLMI), the MW, and the MN, of the polymers produced by this polymerization method. Polymer compositions produced by such methods have various unique properties, including a PDI greater than about 30. Additional embodiments include articles of manufacture or end use articles formed from such polymer compositions.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: March 15, 2011
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Elizabeth A. Benham, Steven J. Secora, Michael D. Jensen, Kathy S. Collins
  • Publication number: 20100291334
    Abstract: Disclosed herein is a polyolefin polymer having improved properties wherein the polymer is produced using a chromium based catalyst in combination with aluminum alkyl activators and co-catalysts. Also disclosed is a pipe comprising the inventive polymer and a film comprising the inventive polymer, each having improved properties over those known in the art.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 18, 2010
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Kevin J. Cann, Mark G. Goode, John H. Moorhouse, Barbara J. Kopp
  • Publication number: 20100222527
    Abstract: A method comprising (a) providing a catalyst comprising chromium and a support having a pore volume of from about 1.7 ml/g to about 3.5 ml/g and a surface area of from about 450 m2/g to about 700 m2/g, (b) oxidizing the catalyst to form an oxidized catalyst, (c) reducing the oxidized catalyst to form an oxidized reduced catalyst, (d) oxidizing the oxidized reduced catalyst to form an activated catalyst, (e) contacting the activated catalyst with an olefin under conditions suitable to form a polyolefin, and (f) recovering the polyolefin, wherein the polyolefin has a density of greater than about 0.960 g/cc and a melt index of from about 1.3 g/10 min. to about 2.8 g/10 min.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Ashish M. Sukhadia, Max P. McDaniel, Ted Cymbaluk, Rajendra K. Krishnaswamy, Lawrence Szmutko
  • Patent number: 7754845
    Abstract: The object of the present invention is to provide a production method of a high molecular weight aromatic polycarbonate containing a reduced amount of a high melting point product, and having less thermal history received and excellent hue by a melt process. The present invention relates to a production method of an aromatic polycarbonate, characterized in that in producing an aromatic polycarbonate using an aromatic dihydroxy compound and a carbonic diester as raw materials and using plural reactors, a molten reactant temperature T1 (° C.) in at least one reactor A and a molten reactant temperature T2 (° C.) in a reactor B subsequent to the reactor A are satisfied with the relationship of T2<T1, and an evaporation surface area per unit treatment amount of a molten reactant in the reactor to which a molten reactant having a limiting viscosity of 0.1 dl/g or more is supplied is 1.0 m2·hr/m3 or more.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: July 13, 2010
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Toshiyuki Hamano, Ryuuji Uchimura, Kazuyuki Takahashi, Masaaki Miyamoto
  • Patent number: 7745551
    Abstract: The present invention discloses the use of a chromium-based catalyst system in two serially connected loop reactors for copolymerising ethylene and a comonomer, at reduced productivity, the final polyethylene having a reduced amount of gel.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: June 29, 2010
    Assignee: Total Petrochemicals Research Feluy
    Inventors: Philippe Bodart, Philippe Marechal, Eric Damme
  • Publication number: 20100129581
    Abstract: A process for making an ethylene homopolymer in the presence of an oxide-supported chromium catalyst is disclosed. A small amount of an ?-olefin contacted with the catalyst before polymerizing ethylene or introduced into an ethylene homopolymerization unexpectedly boosts process productivity. When used at part per million levels, the ?-olefin improves productivity while maintaining desirable polymer properties. The invention is particularly valuable for making HDPE resins useful for blow molding applications.
    Type: Application
    Filed: November 21, 2008
    Publication date: May 27, 2010
    Inventors: Michael W. Lynch, Mark K. Reinking