Patents by Inventor Ivan Jeremy Hartley

Ivan Jeremy Hartley 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).

  • Reactor product discharge system
    Patent number: 6498220
    Abstract: A process is disclosed for removing particulate product from a fluidized bed reactor to optimize, within the constraints of the product removal cycle, conservation of gas in which the product is entrained. Data are compiled on the time required for equalizing pressure between product discharge tanks, and these data are used to determine the optimum times for various valves to be open. Product movement steps and equalization steps can be performed simultaneously.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: December 24, 2002
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ivan Jeremy Hartley, Guadalupe Garcia Leal, John Roberts Parrish
  • Method of detecting and correcting local defluidization and channeling in fluidized-bed reactors for polymerization
    Patent number: 6384157
    Abstract: A method is provided to monitor, detect and correct local defluidization and channeling in fluidized-bed reactors for polymerization of olefin and/or diolefin polymers. The detection is preferably conducted by (i) continuously and/or intermittently comparing a signal which is a function of the currently measured fluidization bulk density with a signal which is a function of the time-averaged baselines of fluidized bulk density.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: May 7, 2002
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ping Cai, Ivan Jeremy Hartley, Kiu Hee Lee, Lance Lyle Jacobsen
  • Preventing upsets in polymerization reactors
    Patent number: 6365681
    Abstract: In a polymerization reaction, an upset is anticipated and inhibited by monitoring at least one reaction condition and comparing it to the desired value or normal range for the condition as projected by a computer model for the variable or variables of the process. In a preferred variation, the process not only continuously adjusts the set point or range for an upset-significant variable such as temperature, but also utilizes the rate of change of such a variable as a harbinger of an upset.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: April 2, 2002
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ivan Jeremy Hartley, John Roberts Parrish, Paul Kevin Samples, Darrell James Long
  • Reactor product discharge system
    Publication number: 20010034422
    Abstract: A process is disclosed for removing particulate product from a fluidized bed reactor to optimize, within the constraints of the product removal cycle, conservation of gas in which the product is entrained. Data are compiled on the time required for equalizing pressure between product discharge tanks, and these data are used to determine the optimum times for various valves to be open. Product movement steps and equalization steps can be performed simultaneously.
    Type: Application
    Filed: June 22, 2001
    Publication date: October 25, 2001
    Inventors: Ivan Jeremy Hartley, Guadalupe Garcia Leal, John Roberts Parrish
  • Reactor product discharge system
    Patent number: 6255411
    Abstract: A process is disclosed for removing particulate product from a fluidized bed reactor to optimize, within the constraints of the product removal cycle, conservation of gas in which the product is entrained. Data are compiled on the time required for equalizing pressure between product discharge tanks, and these data are used to determine the optimum times for various valves to be open. Product movement steps and equalization steps can be performed simultaneously.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: July 3, 2001
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ivan Jeremy Hartley, Guadalupe Garcia Leal, John Roberts Parrish
  • Method of fluidized bed temperature control
    Patent number: 5990250
    Abstract: An improved method of bed temperature control is provided by the coordinated manipulation of the water flow rate in one or more heat exchangers and cycle gas flow rate to the reactor.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: November 23, 1999
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: John Roberts Parrish, August Joseph Boldt, Thomas James McNeil, Ivan Jeremy Hartley
  • Process control in the presence of chromium based catalysts
    Patent number: 5844054
    Abstract: A continuous process for the polymerization of one or more alpha-olefins in the gas phase in the presence of a chromium based catalyst, under polymerization conditions including the reaction temperature, the pressure, and the target oxygen to alpha-olefin molar ratio operating point required for desired resin properties.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: December 1, 1998
    Inventors: Paul Kevin Samples, William Albert Matthews, John Roberts Parrish, Ivan Jeremy Hartley, Kiu Hee Lee