Patents by Inventor Fathi D. Hussein

Fathi D. Hussein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11230614
    Abstract: Methods for reducing gels and/or dome sheeting in gas phase polymerization processes and their resulting products are provided. The polymerization processes include polymerizing ethylene and one or more optional comonomers in a fluidized bed reactor in the presence of a metallocene catalyst, hydrogen, and at least one condensing agent.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: January 25, 2022
    Assignee: ExxonMobil Chemical Patent Inc.
    Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
  • Publication number: 20200010585
    Abstract: Methods for reducing gels and/or dome sheeting in gas phase polymerization processes and their resulting products are provided. The polymerization processes include polymerizing ethylene and one or more optional comonomers in a fluidized bed reactor in the presence of a metallocene catalyst, hydrogen, and at least one condensing agent.
    Type: Application
    Filed: December 13, 2017
    Publication date: January 9, 2020
    Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
  • Patent number: 10253121
    Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: April 9, 2019
    Assignee: Univation Technologies, LLC
    Inventors: Timothy M. Boller, Ching-Tai Lue, Francis C. Rix, Daniel P. Zilker, Jr., C. Jeff Harlan, James M. Farley, Fathi D. Hussein, Dongming Li, Steven A. Best
  • Publication number: 20160347874
    Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.
    Type: Application
    Filed: February 10, 2015
    Publication date: December 1, 2016
    Applicant: Univation Technologies, LLC
    Inventors: Timothy M. Boller, Ching-Tai Lue, Francis C. Rix, Daniel P. Zilker, Jr., C. Jeff Harlan, James M. Farley, Fathi D. Hussein, Dongming Li, Steven A. Best
  • Publication number: 20120070575
    Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.
    Type: Application
    Filed: November 22, 2011
    Publication date: March 22, 2012
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Randall B. Laird, Zerong Lin, Michael E. Muhle, Agapios K. Agapiou, David M. Glowczwski, Fathi D. Hussein, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Keith W. Trapp
  • Patent number: 8129481
    Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: March 6, 2012
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Randall B. Laird, Zerong Lin, Michael E. Muhle, Agapios K. Agapiou, David M. Glowczwski, Fathi D. Hussein, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Keith W. Trapp
  • Patent number: 8088870
    Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: January 3, 2012
    Assignee: Univation Technologies, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Randall B. Laird, Zerong Lin, Michael E. Muhle, Agapios K. Agapiou, David M. Glowczwski, Fathi D. Hussein, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Keith W. Trapp
  • Patent number: 8067509
    Abstract: A process for the polymerization of olefin's, including: introducing an olefin and a polymerization catalyst into a polymerization reactor to form a polyolefin, the polymerization reactor including: a fluidized bed region having a top and a bottom; and a motive bed region; wherein a first end of the motive bed region is fluidly connected to the top of the fluidized bed region; and wherein a second end of the motive bed region is fluidly connected to the bottom of the fluidized bed region; and wherein a diameter of the fluidized bed region is greater than a diameter of the motive bed region; circulating at least a portion of the olefin, the catalyst, and the polyolefin through the fluidized bed region and the motive bed region; maintaining a dense-phase fluidized bed within the fluidized bed region; recovering polyolefin from the fluidized bed region, is provided. A reactor system directed to the process is also provided.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: November 29, 2011
    Assignee: Univation Technologies, LLC
    Inventors: Fathi D. Hussein, Ping Cai, Jose F. Cevallos-Candau, Ian D. Burdett, W. Scott Hamilton, Daniel N. Thomas, Jr.
  • Publication number: 20110034657
    Abstract: A process for the polymerization of olefin's, including: introducing an olefin and a polymerization catalyst into a polymerization reactor to form a polyolefin, the polymerization reactor including: a fluidized bed region having a top and a bottom; and a motive bed region; wherein a first end of the motive bed region is fluidly connected to the top of the fluidized bed region; and wherein a second end of the motive bed region is fluidly connected to the bottom of the fluidized bed region; and wherein a diameter of the fluidized bed region is greater than a diameter of the motive bed region; circulating at least a portion of the olefin, the catalyst, and the polyolefin through the fluidized bed region and the motive bed region; maintaining a dense-phase fluidized bed within the fluidized bed region; recovering polyolefin from the fluidized bed region, is provided. A reactor system directed to the process is also provided.
    Type: Application
    Filed: April 21, 2009
    Publication date: February 10, 2011
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Fathi D. Hussein, Ping Cai, Jose F. Cevallos-Candau, Ian D. Burdett, W. Scott Hamilton, Daniel N. Thomas, JR.
  • Publication number: 20100184927
    Abstract: A method for treating at least one interior surface (for example, a bed wall) of a fluidized bed polymerization reactor system, including by applying a solution catalyst (preferably at least substantially uniformly and in liquid form) to each surface, and optionally (where a catalyst component of the solution catalyst comprises at least one chromium containing compound) oxidizing at least some of the applied chromium containing compound in a controlled manner.
    Type: Application
    Filed: February 21, 2008
    Publication date: July 22, 2010
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Robert O. Hagerty, Kevin B. Stavens, Randall B. Laird, Zerong Lin, Michael E. Muhle, Agapios K. Agapiou, David M. Glowczwski, Fathi D. Hussein, Gary D. Mohr, Ted A. Powell, Michael E. Sieloff, Edward F. Smith, Keith W. Trapp
  • Patent number: 5625012
    Abstract: A method for inhibiting polymer build-up in a recycle line and a heat exchanger during a polymerization process of one or more alpha olefins, particularly sticky polymers, which method comprises introducing as an antifouling an alcohol having 1 to 10 carbon atoms, an alkyl or cycloalkyl ether having 2 to 20 carbon atoms, or a mixture thereof at one or more locations in the recycle gas line in an amount sufficient to inhibit polymer buildup.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: April 29, 1997
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Fathi D. Hussein, Kiu H. Lee, Xinlai Bai
  • Patent number: 5616661
    Abstract: A process for controlling the particle growth of a polymer in a gas phase polymerization reaction by using an inert particulate material and an unsupported liquid polymerization catalyst.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: April 1, 1997
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ronald S. Eisinger, Christopher S. Hunnisett, Fathi D. Hussein, Kiu H. Lee, Kevin J. Cann
  • Patent number: 5548040
    Abstract: A method for passivating internal surfaces of a reactor system during start-up and shutdown of an alpha olefin polymerization or copolymerization reaction by adding a passivation agent such as a dialkyl zinc compound, an alcohol, or an epoxide, to the reactor prior to exposing the internal reactor surfaces to air or moisture before reaction initiation and/or after reaction ceases.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: August 20, 1996
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Kevin J. Cann, Fathi D. Hussein, Daniel P. Zilker, Jr., Kiu H. Lee
  • Patent number: 5510433
    Abstract: A process for the production of EPM or EPDM comprising contacting ethylene, propylene, and, optionally, one or more dienes, in a fluidized bed, at a temperature at or above the sticking temperature of the product resin, under polymerization conditions, with(i) a prepolymer containing a transition metal catalyst precursor with the proviso that the prepolymer is not sticky at the process temperature;(ii) a hydrocarbyl aluminum and/or a hydrocarbyl aluminum halide cocatalyst,; and, optionally,(iii) a halocarbon promoter; and, optionally,(iv) an inert particulate material having a mean particle size in the range of about 0.01 to about 150 microns wherein the particulate material is either contained in the prepolymer or is independent of the prepolymer,wherein the amount of prepolymer or the combined amount of prepolymer and inert particulate material is sufficient to essentially prevent agglomeration of the fluidized bed and the product resin.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: April 23, 1996
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Edgar C. Baker, Jose F. Cevallos-Candau, Fathi D. Hussein, Kiu H. Lee, Allen Noshay
  • Patent number: 5416175
    Abstract: A method for reducing sheeting during polymerization of alpha-olefins in a fluidized bed employing catalysts prone to cause sheeting which comprises feeding a material carrying a static electric charge opposite to the static charge in said bed, said opposite charge of said material being generated by passing said material in contact with a surface adapted to impart said static electric charge to said material opposite the charge existing in said bed.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: May 16, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Gyung-Ho Song, Fathi D. Hussein, Kiu H. Lee, Henry B. Hinckley
  • Patent number: 5376743
    Abstract: A process for the production of EPM or EPDM comprising contacting ethylene, propylene, and, optionally, one or more dienes, in a fluidized bed, at a temperature at or above the sticking temperature of the product resin, under polymerization conditions, with(i) a prepolymer containing a transition metal catalyst precursor with the proviso that the prepolymer is not sticky at the process temperature;(ii) a hydrocarbyl aluminum and/or a hydrocarbyl aluminum halide cocatalyst,; and, optionally,(iii) a halocarbon promoter; and, optionally,(iv) an inert particulate material having a mean particle size in the range of about 0.01 to about 150 microns wherein the particulate material is either contained in the prepolymer or is independent of the prepolymer,wherein the amount of prepolymer or the combined amount of prepolymer and inert particulate material is sufficient to essentially prevent agglomeration of the fluidized bed and the product resin.
    Type: Grant
    Filed: March 11, 1993
    Date of Patent: December 27, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Edgar C. Baker, Jose F. Cevallos-Candau, Fathi D. Hussein, Kiu H. Lee, Allen Noshay
  • Patent number: 5342907
    Abstract: A process comprising contacting a mixture comprising ethylene, propylene, and, optionally, a diene, in the gas phase, under polymerization conditions, with a catalyst system comprising:(a) a catalyst precursor, in independent or prepolymer form, consisting of vanadium (acetylacetonate).sub.3 ;(b) optionally, a support for said precursor;(c) a cocatalyst consisting essentially of (i) an alkylaluminum halide having the formula AlR.sub.(3-a) X.sub.a wherein each R is independently alkyl having 1 to 14 carbon atoms; each X is independently chlorine, bromine, or iodine; and a is 1 or 2, and (ii) optionally, a trialkylaluminum provided that the molar ratio of alkylaluminum halide to trialkylaluminum is at least about 1.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: August 30, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Kevin J. Cann, Fathi D. Hussein, Kiu H. Lee, Daniel P. Zilker, Jr., James W. Nicoletti, Xinlai Bai
  • Patent number: 5264506
    Abstract: A process for producing sticky polymers at polymerization reaction temperatures in excess of the softening temperatures of the sticky polymers in a fluidized bed reactor in the presence of an inert particulate material which comprises utilizing as a support material for the catalyst, a support which includes silica having an average particle size of from about 60 to about 200 microns.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: November 23, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ronald S. Eisinger, Fathi D. Hussein, David N. Edwards, Kiu H. Lee
  • Patent number: 5194526
    Abstract: An improvement in the process for producing sticky polymers in a fluidized bed reactor catalyzed by a transition metal catalyst in the presence of an inert particulate material prone to generate excessive negative charges in said reactor, by conducting the process in the presence of a composition comprising a mixture of an alcohol phosphate salt and a quarternary ammonium salt, which is dissolved in a suitable solvent.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: March 16, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Fathi D. Hussein, Kiu H. Lee
  • Patent number: 5037905
    Abstract: A method for inhibiting polymer build-up in a heat exchanger during the gas phase polymerization of alpha-olefins which comprises introducing upstream of the heat exchanger para ethyl ethoxybenzoate in an amount sufficient to inhibit polymer build-up.
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: August 6, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Weldon C. Cummings, Reginald W. Geck, Fathi D. Hussein