Patents by Inventor Douglas D. Klendworth
Douglas D. Klendworth 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: 10358513Abstract: Improved Ziegler-Natta catalysts and methods of making the improved catalyst are described. The Ziegler-Natta catalyst is formed using a spherical MgCl2-xROH support, where R is a linear, cyclic or branched hydrocarbon unit with 1-10 carbon atoms and where ROH is an alcohol or a mixture of at least two different alcohols and where x has a range of about 1.5 to 6.0, preferably about 2.5 to 4, more preferably about 2.9 to 3.4, and even more preferably 2.95 to 3.35. The Ziegler-Natta catalyst includes a Group 4-8 transition metal and an internal donor. The catalyst has improved activity in olefin polymerization reactions as well as good stereoregularity and hydrogen sensitivity.Type: GrantFiled: June 10, 2009Date of Patent: July 23, 2019Assignee: Lummus Novolen Technology GmbHInventors: Douglas D. Klendworth, Kenneth W. Johnson, Andreas Winter, Franz Langhauser
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Publication number: 20100069586Abstract: Improved Ziegler-Natta catalysts and methods of making the improved catalyst are described. The Ziegler-Natta catalyst is formed using a spherical MgCl2-xROH support, where R is a linear, cyclic or branched hydrocarbon unit with 1-10 carbon atoms and where ROH is an alcohol or a mixture of at least two different alcohols and where x has a range of about 1.5 to 6.0, preferably about 2.5 to 4, more preferably about 2.9 to 3.4, and even more preferably 2.95 to 3.35. The Ziegler-Natta catalyst includes a Group 4-8 transition metal and an internal donor. The catalyst has improved activity in olefin polymerization reactions as well as good stereoregularity and hydrogen sensitivity.Type: ApplicationFiled: June 10, 2009Publication date: March 18, 2010Inventors: Douglas D. Klendworth, Kenneth W. Johnson, Andreas Winter, Franz Langhauser
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Patent number: 7402546Abstract: The invention relates to supports comprising inorganic oxide particles coated with magnesium chloride and a method for making them. The inorganic oxide has a mean particle diameter of less than 5 microns and is used as a seed to crystallize magnesium chloride from solution. The magnesium chloride-coated inorganic oxide is useful for supporting transition metal compounds; the supported transition metal compounds are used as catalysts for polymerizing olefins.Type: GrantFiled: September 23, 2004Date of Patent: July 22, 2008Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking, Edward D. Kist
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Patent number: 7071137Abstract: A method for making a Ziegler-Natta catalyst support includes the steps of contacting a fumed silica with a surface modifying agent such as a compound having the formula RMgX MgR?R? wherein R, R? and R? are each individually a moiety selected from an alkyl group, cycloalkyl, aryl or alkaryl group, and X is a halogen selected from the group consisting of chlorine, bromine and iodine, to provide a pretreated silica seeding agent. The pretreated silica seeding agent is then dispersed in a non-aqueous liquid magnesium halide/alkanol complex, and the magnesium halide is crystallized onto the silica particles to form catalyst support particles especially suitable for Ziegler-Natta catalysts.Type: GrantFiled: August 25, 2004Date of Patent: July 4, 2006Assignee: Novolen Technology Holdings, C.V.Inventors: Douglas D. Klendworth, Frank Wolf Spaether
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Patent number: 6979718Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: GrantFiled: July 28, 2003Date of Patent: December 27, 2005Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6967231Abstract: A process for polymerizing ethylene is disclosed. A magnesium chloride-alcohol is used to support an organometallic complex comprising a Group 3 to 10 transition metal and an indenoindolyl ligand. The supported organometallic complex is mixed with an activator and ethylene and the ethylene is polymerized. Use of magnesium chloride containing an alcohol as the support provides an unexpected boost in catalyst activity and improves polymer rheological properties.Type: GrantFiled: September 23, 2004Date of Patent: November 22, 2005Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Douglas D. Klendworth, Mark K. Reinking
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Publication number: 20040266934Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: ApplicationFiled: July 28, 2003Publication date: December 30, 2004Applicant: EQUISTAR CHEMICALS, LPInventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6800703Abstract: A method for producing propylene polymers having a broad molecular weight distribution (MWD) is disclosed. The method uses a Ziegler catalyst and one silane donor. The silane donor is selected from vinyltrimethoxysilane or dicyclohexyldimethoxysilane. The polymers made by the method have an MWD greater than or equal to 7.0.Type: GrantFiled: October 15, 2003Date of Patent: October 5, 2004Assignee: Equistar Chemicals, LPInventors: Mark K. Reinking, Douglas D. Klendworth
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Patent number: 6656995Abstract: A process for producing olefin polymer composites having improved melt strength and other improved physical characteristics is provided. The process is a solution process wherein an organically modified clay is intimately incorporated, at low levels and without the use of compatibilizing agents, into an olefin polymer base resin.Type: GrantFiled: March 12, 2002Date of Patent: December 2, 2003Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking, Sameer D. Mehta
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Patent number: 6646072Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: GrantFiled: January 23, 2002Date of Patent: November 11, 2003Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6630544Abstract: A process for polymerizing propylene is disclosed. The process involves charging propylene and about 90 to 99% of an organoaluminum cocatalyst to a reactor and heating this mixture to at least about 50° C. This is followed by addition of a premix of 1 to 10% of the organoaluminum cocatalyst with a magnesium halide-supported Ziegler-Natta catalyst. The temperature of the reaction mixture is maintained to produce a propylene polymer. The process gives improved catalyst activity.Type: GrantFiled: April 18, 2002Date of Patent: October 7, 2003Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking, Edward D. Kist, Karen E. Meyer
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Publication number: 20030176553Abstract: A process for producing olefin polymer composites having improved melt strength and other improved physical characteristics is provided. The process is a solution process wherein an organically modified clay is intimately incorporated, at low levels and without the use of compatibilizing agents, into an olefin polymer base resin.Type: ApplicationFiled: March 12, 2002Publication date: September 18, 2003Inventors: Douglas D. Klendworth, Mark K. Reinking, Sameer D. Mehta
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Publication number: 20030139545Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: ApplicationFiled: January 23, 2002Publication date: July 24, 2003Inventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6395669Abstract: A catalyst component formed by the steps of contacting a transition metal-containing metallocene of a transition metal of Group 4, 5 or 6 of the Periodic Table of the Elements with silica or an organic support. This product is contacted with an organomagnesium compound or complex followed by contact with an alcohol and a silane. Finally, the so-contacted product is contacted with a Group 4, 5 or. 6 transition metal-containing non-metallocene compound. The component is preferably combined with an aluminum-containing cocatalyst to form a catalyst system.Type: GrantFiled: July 27, 2000Date of Patent: May 28, 2002Assignee: Equistar Chemicals, LPInventors: William J. Sartain, Patricia A. Hooks, Keta M. Lindstrom, Stella L. Ellis, Douglas D. Klendworth, Albert P. Masino, Richard W. Fries, Therese A. Pastrick
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Patent number: 6093673Abstract: The invention relates to olefin polymerization using an organosilicon compound from the pyrazolyl family as an external adjuvant.Type: GrantFiled: September 27, 1999Date of Patent: July 25, 2000Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Gregory G. Hlatky
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Patent number: 5534472Abstract: A vanadium-containing catalyst system particularly suited to the polymerization of blow moldable olefin polymers. The catalyst system includes a supported, first catalyst component prepared by contacting preheated silica, with (1) a compound or complex which includes at least one carbon to magnesium covalent bond and (2) a compound which includes at least one carbon to Group III metal covalent bond. The sequence of contact of the silica with compound or complex (1) and compound (2) is optional. However, unless the compound or complex (1) and the compound (2) contact the silica simultaneously, the product of this contact is next contacted with whichever of compound (1) or (2) does not initially contact the silica. The product of the step of contacting with compounds (1) and (2) is contacted with a vanadium compound which includes at least one halogen atom. Finally, the product of the vanadium compound contacting step is contacted with an alcohol.Type: GrantFiled: March 29, 1995Date of Patent: July 9, 1996Assignee: Quantum Chemical CorporationInventors: Linda N. Winslow, Douglas D. Klendworth, Raghu Menon, Michael W. Lynch, Garry L. Fields, Kenneth W. Johnson
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Patent number: 5221720Abstract: High surface are aluminas are pre-calcined to form gamma-alumina. In one embodiment, the gamma-alumina is treated with an anhydrous solution of a fluorine-containing compound. In a second embodiment, alumina is precipitated in the pores of the gamma-alumina and then treated with a fluorine-containing compound. In a third embodiment a cogel of aluminum trifluoride and aluminum hydroxide is prepared. The three inventive fluorided alumina supports can be impregnated with a transition metal, preferably chromium, to form a catalyst system which can be used to polymerize mono-1-olefins.Type: GrantFiled: August 14, 1992Date of Patent: June 22, 1993Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas D. Klendworth, Marvin M. Johnson
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Patent number: 5221655Abstract: High surface are aluminas are pre-calcined to form gamma-alumina. In one embodiment, the gamma-alumina is treated with an anhydrous solution of a fluorine-containing compound. In a second embodiment, alumina is precipitated in the pores of the gamma-alumina and then treated with a fluorine-containing compound. In a third embodiment a cogel of aluminum trifluoride and aluminum hydroxide is prepared. The three inventive fluorided alumina supports can be impregnated with a transition metal, preferably chromium, to form a catalyst system which can be used to polymerize mono-1-olefins.Type: GrantFiled: August 14, 1992Date of Patent: June 22, 1993Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas D. Klendworth, Marvin M. Johnson
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Patent number: 5221654Abstract: High surface are aluminas are pre-calcined to form gamma-alumina. In one embodiment, the gamma-alumina is treated with an anhydrous solution of a fluorine-containing compound. In a second embodiment, alumina is precipitated in the pores of the gamma-alumina and then treated with a fluorine-containing compound. In a third embodiment a cogel of aluminum trifluoride and aluminum hydroxide is prepared. The three inventive fluorided alumina supports can be impregnated with a transition metal, preferably chromium, to form a catalyst system which can be used to polymerize mono-1-olefins.Type: GrantFiled: August 14, 1992Date of Patent: June 22, 1993Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas D. Klendworth, Marvin M. Johnson
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Patent number: 5219962Abstract: High surface are aluminas are pre-calcined to form gamma-alumina. In one embodiment, the gamma-alumina is treated with an anhydrous solution of a fluorine-containing compound. In a second embodiment, alumina is precipitated in the pores of the gamma-alumina and then treated with a fluorine-containing compound. In a third embodiment a cogel of aluminum trifluoride and aluminum hydroxide is prepared. The three inventive fluorided alumina supports can be impregnated with a transition metal, preferably chromium, to form a catalyst system which can be used to polymerize mono-1-olefins.Type: GrantFiled: August 14, 1992Date of Patent: June 15, 1993Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Douglas D. Klendworth, Marvin M. Johnson