Patents by Inventor Dung P. Le
Dung P. Le 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: 9039333Abstract: A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The system includes a fluidized bed pressure vessel, settling vessels, discharge lines, primary discharge valves, vent lines, primary vent valves, crosstie lines, crosstie valves, and primary exit valves wherein the system is absent a transfer tank, and absent a filter element. The method provides for transferring a solid/gas mixture via a discharge line from the pressure vessel to a settling vessel, wherein gas is separated from the mixture, and the gas is transferred to at least one other settling vessel via a crosstie line. After the solids are transferred out of the settling vessel, the empty vessel then receives gas from other settling vessels in the system.Type: GrantFiled: September 10, 2007Date of Patent: May 26, 2015Assignee: Univation Technologies, LLCInventors: Randall L. Force, Robert G. Aronson, Mark W. Blood, Gerardo Corona, Dung P. Le, W. Scott Hamilton, Thomas A. Maliszewski, William K. Lutz
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Patent number: 8496882Abstract: Catalyst feed systems and processes utilizing such systems are described herein. Some embodiments disclosed herein relate to a process for improving the flowability of catalyst in a catalyst feed system, including providing a catalyst feed vessel with at least one heat exchange system for maintaining the catalyst system temperature below a critical flow temperature. Also disclosed is a catalyst feed system for the polymerization of olefins including a catalyst feed vessel; and a heat exchange system for maintaining a temperature of a catalyst within the catalyst feed vessel. Additionally disclosed is a process for polymerization of olefins including maintaining a supported catalyst in a catalyst feed vessel below a critical flow temperature of the catalyst; feeding the catalyst to a polymerization reactor; and contacting the catalyst with an olefin to form a polyolefin.Type: GrantFiled: May 8, 2012Date of Patent: July 30, 2013Assignee: Univation Technologies, LLCInventors: William A. Matthews, Michael I. Hurdle, Gerardo Corona, Dung P. Le, Semra Gercek, George W. Schwarz, Jr.
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Publication number: 20120219463Abstract: Catalyst feed systems and processes utilizing such systems are described herein. Some embodiments disclosed herein relate to a process for improving the flowability of catalyst in a catalyst feed system, including providing a catalyst feed vessel with at least one heat exchange system for maintaining the catalyst system temperature below a critical flow temperature. Also disclosed is a catalyst feed system for the polymerization of olefins including a catalyst feed vessel; and a heat exchange system for maintaining a temperature of a catalyst within the catalyst feed vessel. Additionally disclosed is a process for polymerization of olefins including maintaining a supported catalyst in a catalyst feed vessel below a critical flow temperature of the catalyst; feeding the catalyst to a polymerization reactor; and contacting the catalyst with an olefin to form a polyolefin.Type: ApplicationFiled: May 8, 2012Publication date: August 30, 2012Applicant: UNIVATION TECHNOLOGIES, LLCInventors: William A. Matthews, Michael I. Hurdle, Gerardo Corona, Dung P. Le, Semra Gercek, George W. Schwarz, JR.
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Patent number: 8206654Abstract: Catalyst feed systems and processes utilizing such systems are described herein. Some embodiments disclosed herein relate to a process for improving the flowability of catalyst in a catalyst feed system, including providing a catalyst feed vessel with at least one heat exchange system for maintaining the catalyst system temperature below a critical flow temperature. Also disclosed is a catalyst feed system for the polymerization of olefins including a catalyst feed vessel; and a heat exchange system for maintaining a temperature of a catalyst within the catalyst feed vessel. Additionally disclosed is a process for polymerization of olefins including maintaining a supported catalyst in a catalyst feed vessel below a critical flow temperature of the catalyst; feeding the catalyst to a polymerization reactor; and contacting the catalyst with an olefin to form a polyolefin.Type: GrantFiled: December 15, 2008Date of Patent: June 26, 2012Assignee: Univation Technologies, LLCInventors: William A. Matthews, Michael I. Hurdle, Gerardo Corona, Dung P. Le, Semra Gercek, George W. Schwarz, Jr.
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Patent number: 8129486Abstract: A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The discharge system includes a fluidized bed pressure vessel, a settling vessel, a transfer vessel, discharge line, primary discharge valve, and primary exit valve. Also in included is a method to operate the discharge system. The method includes transferring a solid/gas mixture from a fluidized bed pressure vessel to a settling vessel, transferring the solids to a transfer vessel, and then emptying the transfer vessel.Type: GrantFiled: September 10, 2007Date of Patent: March 6, 2012Assignee: Univation Technologies, LLCInventors: Randall L. Force, Robert G. Aronson, Mark W. Blood, Gerardo Corona, Dung P. Le, W. Scott Hamilton, Thomas A. Maliszewski, William K. Lutz
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Publication number: 20100324233Abstract: Catalyst feed systems and processes utilizing such systems are described herein. Some embodiments disclosed herein relate to a process for improving the flowability of catalyst in a catalyst feed system, including providing a catalyst feed vessel with at least one heat exchange system for maintaining the catalyst system temperature below a critical flow temperature. Also disclosed is a catalyst feed system for the polymerization of olefins including a catalyst feed vessel; and a heat exchange system for maintaining a temperature of a catalyst within the catalyst feed vessel. Additionally disclosed is a process for polymerization of olefins including maintaining a supported catalyst in a catalyst feed vessel below a critical flow temperature of the catalyst; feeding the catalyst to a polymerization reactor; and contacting the catalyst with an olefin to form a polyolefin.Type: ApplicationFiled: December 15, 2008Publication date: December 23, 2010Applicant: UNIVATION TECHNOLOGIES, LLCInventors: William A. Matthews, Michael I. Hurdle, Gerardo Corona, Dung P. Le, Semra Gercek, George W. Schwarz, JR.
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Publication number: 20100143050Abstract: A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The system includes a fluidized bed pressure vessel, settling vessels, discharge lines, primary discharge valves, vent lines, primary vent valves, crosstie lines, crosstie valves, and primary exit valves wherein the system is absent a transfer tank, and absent a filter element. The method provides for transferring a solid/gas mixture via a discharge line from the pressure vessel to a settling vessel, wherein gas is separated from the mixture, and the gas is transferred to at least one other settling vessel via a crosstie line. After the solids are transferred out of the settling vessel, the empty vessel then receives gas from other settling vessels in the system.Type: ApplicationFiled: September 10, 2007Publication date: June 10, 2010Applicant: Univation Technologie, LLC.Inventors: Randall L. Force, Robert G. Aronson, Mark W. Blood, Gerardo Corona, Dung P. Le, W. Scott Hamilton, Thomas A. Maliszewski, William K. Lutz
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Publication number: 20100092252Abstract: A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The discharge system includes a fluidized bed pressure vessel, a settling vessel, a transfer vessel, discharge line, primary discharge valve, and primary exit valve. Also in included is a method to operate the discharge system. The method includes transferring a solid/gas mixture from a fluidized bed pressure vessel to a settling vessel, transferring the solids to a transfer vessel, and then emptying the transfer vessel.Type: ApplicationFiled: September 10, 2007Publication date: April 15, 2010Inventors: Randall L. Force, Robert G. Aronson, Mark W. Blood, Gerardo Corona, Dung P. Le, W. Scott Hamilton, Thomas A. Maliszewski, William K. Lutz