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).
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Patent number: 11230614Abstract: 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: GrantFiled: December 13, 2017Date of Patent: January 25, 2022Assignee: 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
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Publication number: 20200010585Abstract: 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: ApplicationFiled: December 13, 2017Publication date: January 9, 2020Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
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Patent number: 10253121Abstract: 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: GrantFiled: February 10, 2015Date of Patent: April 9, 2019Assignee: Univation Technologies, LLCInventors: 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
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Publication number: 20160347874Abstract: 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: ApplicationFiled: February 10, 2015Publication date: December 1, 2016Applicant: Univation Technologies, LLCInventors: 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
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Publication number: 20120070575Abstract: 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: ApplicationFiled: November 22, 2011Publication date: March 22, 2012Applicant: UNIVATION TECHNOLOGIES, LLCInventors: 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
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Patent number: 8129481Abstract: 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: GrantFiled: November 22, 2011Date of Patent: March 6, 2012Assignee: Univation Technologies, LLCInventors: 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
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Patent number: 8088870Abstract: 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: GrantFiled: February 21, 2008Date of Patent: January 3, 2012Assignee: Univation Technologies, LLCInventors: 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
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Patent number: 8067509Abstract: 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: GrantFiled: April 21, 2009Date of Patent: November 29, 2011Assignee: Univation Technologies, LLCInventors: Fathi D. Hussein, Ping Cai, Jose F. Cevallos-Candau, Ian D. Burdett, W. Scott Hamilton, Daniel N. Thomas, Jr.
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Publication number: 20110034657Abstract: 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: ApplicationFiled: April 21, 2009Publication date: February 10, 2011Applicant: UNIVATION TECHNOLOGIES, LLCInventors: Fathi D. Hussein, Ping Cai, Jose F. Cevallos-Candau, Ian D. Burdett, W. Scott Hamilton, Daniel N. Thomas, JR.
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Publication number: 20100184927Abstract: 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: ApplicationFiled: February 21, 2008Publication date: July 22, 2010Applicant: UNIVATION TECHNOLOGIES, LLCInventors: 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
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Patent number: 5625012Abstract: 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: GrantFiled: October 11, 1995Date of Patent: April 29, 1997Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Fathi D. Hussein, Kiu H. Lee, Xinlai Bai
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Patent number: 5616661Abstract: 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: GrantFiled: March 31, 1995Date of Patent: April 1, 1997Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Ronald S. Eisinger, Christopher S. Hunnisett, Fathi D. Hussein, Kiu H. Lee, Kevin J. Cann
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Patent number: 5548040Abstract: 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: GrantFiled: December 20, 1994Date of Patent: August 20, 1996Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Kevin J. Cann, Fathi D. Hussein, Daniel P. Zilker, Jr., Kiu H. Lee
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Patent number: 5510433Abstract: 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: GrantFiled: September 23, 1994Date of Patent: April 23, 1996Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Edgar C. Baker, Jose F. Cevallos-Candau, Fathi D. Hussein, Kiu H. Lee, Allen Noshay
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Patent number: 5416175Abstract: 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: GrantFiled: December 17, 1993Date of Patent: May 16, 1995Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Gyung-Ho Song, Fathi D. Hussein, Kiu H. Lee, Henry B. Hinckley
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Patent number: 5376743Abstract: 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: GrantFiled: March 11, 1993Date of Patent: December 27, 1994Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Edgar C. Baker, Jose F. Cevallos-Candau, Fathi D. Hussein, Kiu H. Lee, Allen Noshay
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Patent number: 5342907Abstract: 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: GrantFiled: June 28, 1993Date of Patent: August 30, 1994Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Kevin J. Cann, Fathi D. Hussein, Kiu H. Lee, Daniel P. Zilker, Jr., James W. Nicoletti, Xinlai Bai
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Patent number: 5264506Abstract: 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: GrantFiled: December 30, 1992Date of Patent: November 23, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Ronald S. Eisinger, Fathi D. Hussein, David N. Edwards, Kiu H. Lee
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Patent number: 5194526Abstract: 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: GrantFiled: July 30, 1992Date of Patent: March 16, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Fathi D. Hussein, Kiu H. Lee
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Patent number: 5037905Abstract: 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: GrantFiled: December 7, 1989Date of Patent: August 6, 1991Assignee: Union Carbide Chemicals and Plastics Technology CorporationInventors: Weldon C. Cummings, Reginald W. Geck, Fathi D. Hussein