Patents by Inventor Jeffrey W. Freeman
Jeffrey W. Freeman 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: 7718838Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: GrantFiled: December 12, 2006Date of Patent: May 18, 2010Assignee: Chevron Phillips Chemical Company LPInventors: William M. Woodard, Warren M. Ewert, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
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Patent number: 7157612Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: GrantFiled: June 18, 2004Date of Patent: January 2, 2007Assignee: Phillips Petroleum CompanyInventors: Warren M. Ewert, William M. Woodard, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
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Publication number: 20040228775Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: ApplicationFiled: June 18, 2004Publication date: November 18, 2004Inventors: Warren M. Ewert, William M. Woodard, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
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Publication number: 20020182124Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: ApplicationFiled: October 14, 1997Publication date: December 5, 2002Inventors: WILLIAM M. WOODARD, WARREN M. EWERT, HARVEY D. HENSLEY, MARK E. LASHIER, BRUCE E. KREISCHER, GLYNDAL D. COWAN, JEFFREY W. FREEMAN, RALPH V. FRANKLIN, RONALD D. KNUDSEN, RICHARD L. ANDERSON, LYLE R. KALLENBACH
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Patent number: 6455648Abstract: A process is provided which comprises preparing an olefin oligomerization or trimerization catalyst system and producing olefins in the presence of the olefin oligomerization or trimerization catalyst system and a solvent, wherein said catalyst system preparation comprises the steps of first contacting a chromium source and a pyrrole-containing compound to form a chromium/pyrrole mixture; second, contacting said chromium/pyrrole mixture with a metal alkyl to form a catalyst system; and then contacting said catalyst system with an alpha-olefin, preferably ethylene.Type: GrantFiled: December 29, 1999Date of Patent: September 24, 2002Assignee: Chevron Phillips Chemical Company LPInventors: Jeffrey W. Freeman, Warren M. Ewert, Bruce E. Kreischer, Ronald D. Knudsen, Glyndal D. Cowan
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Publication number: 20010053742Abstract: A process is provided to modify an olefin production catalyst system which comprises contacting an olefin production catalyst system with ethylene prior to use. A second embodiment of the invention comprises contacting an aluminum alkyl and a pyrrole-containing compound prior to contacting a chromium containing compound and prior to contacting an olefin. A process also is provided to trimerize and/or oligomerize olefins with the novel, modified olefin catalyst production systems. These modified olefin production catalyst systems can produce less solids, such as, for example, polymer, during a trimerization reaction.Type: ApplicationFiled: December 18, 1998Publication date: December 20, 2001Inventors: RONALD D. KNUDSEN, JEFFREY W. FREEMAN
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Patent number: 5986153Abstract: A process for substantially stabilizing the color of a fluid which comprises an olefin is disclosed. The process comprises contacting the fluid with a composition, which comprises aluminum, zirconium and a borate, under a condition effective to stabilize the color of the fluid.Type: GrantFiled: September 30, 1997Date of Patent: November 16, 1999Assignee: Phillips Petroleum CompanyInventors: Lyle R. Kallenbach, Jeffrey W. Freeman
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Patent number: 5919996Abstract: A process is provided to modify an olefin production catalyst system which comprises contacting an olefin production catalyst system with ethylene prior to use. A process also is provided to trimerize and/or oligomerize olefins with the novel, modified olefin catalyst production system. The modified olefin production catalyst system produces less solids, such as, for example, polymer.Type: GrantFiled: October 13, 1998Date of Patent: July 6, 1999Assignee: Phillips Petroleum CompanyInventors: Jeffrey W. Freeman, John L. Buster, Ronald D. Knudsen
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Patent number: 5856257Abstract: A process is provided to modify an olefin production catalyst system which comprises contacting an olefin production catalyst system with ethylene prior to use. A process also is provided to trimerize and/or oligomerize olefins with the novel, modified olefin catalyst production system. The modified olefin production catalyst system produces less solids, such as, for example, polymer.Type: GrantFiled: May 16, 1997Date of Patent: January 5, 1999Assignee: Phillips Petroleum CompanyInventors: Jeffrey W. Freeman, John L. Buster, Ronald D. Knudsen
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Patent number: 5814575Abstract: Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.Type: GrantFiled: June 7, 1995Date of Patent: September 29, 1998Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman
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Patent number: 5786431Abstract: Novel chromium-containing compounds are prepared by forming a mixture of a chromium salt, a metal amide, and an ether. These novel chromium-containing, or chromium pyrrolide, compounds, with a metal alkyl and an unsaturated hydrocarbon, can be used as a cocatalyst system in the presence of an olefin polymerization catalyst system to produce a comonomer in-situ. The resultant polymer, although produced from predominately one monomer, has characteristics of a copolymer.Type: GrantFiled: June 7, 1995Date of Patent: July 28, 1998Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman, Elizabeth A. Benham
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Patent number: 5763723Abstract: Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.Type: GrantFiled: June 7, 1995Date of Patent: June 9, 1998Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman
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Patent number: 5689028Abstract: A process is provided to inhibit trimerization catalyst system activity which comprises the sequential steps of contacting a reactor effluent stream with alcohol; removing any desired olefin products; adding an aqueous base to the non-olefin portion; removing a precipitate; separating the aqueous and organic phases; and adding an acid to the aqueous phase.Type: GrantFiled: December 18, 1995Date of Patent: November 18, 1997Assignee: Phillips Petroleum CompanyInventors: Mark E. Lashier, Jeffrey W. Freeman, Ronald D. Knudsen
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Patent number: 5563312Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: GrantFiled: May 19, 1995Date of Patent: October 8, 1996Assignee: Phillips Petroleum CompanyInventors: Ronald D. Knudsen, Jeffrey W. Freeman, Mark E. Lashier
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Patent number: 5543375Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.Type: GrantFiled: February 18, 1994Date of Patent: August 6, 1996Assignee: Phillips Petroleum CompanyInventors: Mark E. Lashier, Jeffrey W. Freeman, Ronald D. Knudsen
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Patent number: 5523507Abstract: Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.Type: GrantFiled: July 29, 1994Date of Patent: June 4, 1996Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman
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Patent number: 5451645Abstract: Novel chromium-containing compounds are prepared by forming a mixture of a chromium salt, a metal amide, and an ether. These novel chromium-containing, or chromium pyrrolide, compounds, with a metal alkyl and an unsaturated hydrocarbon, can be used as a cocatalyst system in the presence of an olefin polymerization catalyst system to produce a comonomer in-situ. The resultant polymer, although produced from predominately one monomer, has characteristics of a copolymer.Type: GrantFiled: August 20, 1993Date of Patent: September 19, 1995Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman, Elizabeth A. Benham
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Patent number: 5376612Abstract: Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.Type: GrantFiled: August 20, 1993Date of Patent: December 27, 1994Assignee: Phillips Petroleum CompanyInventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman