Patents by Inventor Randall B. Laird
Randall B. Laird 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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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: 7858714Abstract: This invention is directed to processes of making polymer in the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene based polymers using Ziegler Natta catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: December 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Chia S. Chee, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Peijun Jiang
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Patent number: 7858719Abstract: The present invention relates to a gas phase process for polymerizing one or more hydrocarbon monomer(s) in the presence of a catalyst system and a fluorinated hydrocarbon, where the fluorinated hydrocarbon is present at a partial pressure of 6.9 to 348 kPa in the reactor and the reactor temperature is from 30 to 120° C.Type: GrantFiled: May 19, 2005Date of Patent: December 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert Olds Hagerty, Kevin B. Stavens, Randall B. Laird, Michael F. McDonald, Pradeep P. Shirodkar
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Patent number: 7858736Abstract: This invention relates to a process comprising contacting an polymerization reactor effluent with a fluorinated hydrocarbon and thereafter recovering olefin polymer, where the fluorinated hydrocarbon is present at 5 volume % to 99 volume % based upon the volume of the effluent and the fluorinated hydrocarbon, and where the polymerization is a continuous polymerization of at least 75 mole % of hydrocarbon monomers, based upon the total moles of monomer present in the reactor.Type: GrantFiled: June 20, 2005Date of Patent: December 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Peijun Jiang, Robert Olds Hagerty, John Richard Shutt, Charles Stanley Speed, Randall B. Laird, Kevin B. Stavens, Larry L. Iaccino
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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: 7728084Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to the recovery of the hydrofluorocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of ethylene based polymers using Ziegler Natta catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: June 1, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Chia S. Chee, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Zerong Lin, Larry L. Iaccino
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Patent number: 7700699Abstract: This invention is directed to processes of making polymer in the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for re-use in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene polymers and copolymes using bulky ligand metallocene-type catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: April 20, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Peijun Jiang
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Patent number: 7691956Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to the recovery of the hydrofluorocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of ethylene based polymers using bulky ligand metallocene-type catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: April 6, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Chia S. Chee, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Zerong Lin, Larry L. Iaccino
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Patent number: 7491776Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and provide polymer products that can be manufactured to relatively low densities. The invention is particularly beneficial in the production of ethylene based polymers using chromium catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: February 17, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Chia S. Chee, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Zerong Lin, Larry L. Iaccino
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Publication number: 20080312375Abstract: This invention is directed to processes of making polymer in the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for re-use in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene polymers and copolymes using bulky ligand metallocene-type catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: December 18, 2008Inventors: Robert O. Hagerty, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Peijun Jiang
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Publication number: 20080287615Abstract: The present invention relates to a gas phase process for polymerizing one or more hydrocarbon monomer(s) in the presence of a catalyst system and a fluorinated hydrocarbon, where the fluorinated hydrocarbon is present at a partial pressure of 6.9 to 348 kPa in the reactor and the reactor temperature is from 30 to 120° C.Type: ApplicationFiled: May 19, 2005Publication date: November 20, 2008Inventors: Robert Olds Hagerty, Kevin B. Stavens, Randall B. Laird, Michael F. McDonald, Pradeep P. Shirodkar
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Patent number: 7449530Abstract: This invention is directed to processes of making polymer in the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for re-use in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene-ethylene based copolymers using Ziegler-Natta catalyst systems.Type: GrantFiled: June 20, 2005Date of Patent: November 11, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert O. Hagerty, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Peijun Jiang
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Patent number: 7423103Abstract: This invention is directed to a polymerization process that is carried out at relatively high productivity levels and with relatively low fouling. The process includes mixing together a catalyst system, at least one monomer and a hydrofluorocarbon to produce the polymer. The reaction is carried out such that little to no chlorine containing hydrocarbons are present.Type: GrantFiled: June 20, 2005Date of Patent: September 9, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Kevin B. Stavens, Robert O. Hagerty, Randall B. Laird, Zerong Lin, Michael A. Risch, Larry L. Iaccino
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Patent number: 7414100Abstract: This invention relates to a process to increase the amount of polymer solute in a polymerization medium or effluent comprising introducing a fluorocarbon into the polymerization medium or effluent in an amount effective to increase the amount of polymer solute in the polymerization medium or effluent by at least 3% without causing precipitation of polymer solute from the polymerization medium or effluent, as compared to the same polymerization medium or effluent without the fluorocarbon present. This invention also relates to a process to reduce the viscosity of a polymerization medium or effluent comprising introducing a fluorocarbon into the polymerization medium or effluent in an amount effective to reduce the viscosity of the polymerization medium or effluent by at least 3% without causing precipitation of polymer solute from the polymerization medium or effluent, as compared to the same polymerization medium or effluent without the fluorocarbon present.Type: GrantFiled: June 20, 2005Date of Patent: August 19, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Peijun Jiang, John Richard Shutt, Charles Stanley Speed, Randall B. Laird, Kevin Bruce Stavens, Robert Olds Hagerty
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Publication number: 20080081885Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to the recovery of the hydrofluorocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of ethylene based polymers using bulky ligand metallocene-type catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: April 3, 2008Inventors: Robert O. Hagerty, Chia S. Chee, Randall B. Laird, Michael A. Risch, Pradeep P. Shirodkar, Zerong Lin, Larry L. Iaccino
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Patent number: 7342079Abstract: This invention is directed to processes for making polymer in the presence of a hydrofluorocarbon, and for the recovery of polymer substantially free of dissolved hydrocarbons and hydrofluorocarbons. The processes provided enables polymerization processes to be practiced with minimal fouling in the reaction system, and with the recovery of the hydrofluorocarbon and monomers for reuse in the reactor. The process of the invention utilizes a reactor system, a recovery system and a flare system that minimize environmental emissions of hydrocarbons, hydrofluorocarbons and associated decomposition products.Type: GrantFiled: June 20, 2005Date of Patent: March 11, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jaimes Sher, Robert O. Hagerty, Kevin B. Stavens, Randall B. Laird