Patents by Inventor Louise A. Mahoney

Louise A. Mahoney 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).

  • System and method for providing on-line measurement of impurities in liquid ethylene oxide streams
    Patent number: 11698362
    Abstract: Automated systems and methods for obtaining of the concentration of impurities in a liquid ethylene oxide product stream are shown and described. The systems and methods employ remote injection and flash vaporization of small volumes of liquid ethylene oxide into a carrier gas to minimize polymerization of the ethylene oxide and accumulation of polymerized ethylene oxide. Ethylene oxide peaks are diverted from the gas chromatograph effluent detector to stabilize baseline signal errors and avoid errors in the calculation of an impurity with an adjacent retention time peak. The systems and methods may be used for feedback, feedforward, dynamic matrix, and/or model-based predictive control of ethylene oxide purity. The systems and methods reduce lag times and errors associated with relying on laboratory analyses to make process adjustments.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: July 11, 2023
    Assignee: Dow Technology Investments LLC
    Inventors: Ademola Idowu, Louise A. Mahoney, Robert M. Callender, Clair J. Emery
  • SYSTEM AND METHOD FOR PROVIDING ON-LINE MEASUREMENT OF IMPURITIES IN LIQUID ETHYLENE OXIDE STREAMS
    Publication number: 20210033571
    Abstract: Automated systems and methods for obtaining of the concentration of impurities in a liquid ethylene oxide product stream are shown and described. The systems and methods employ remote injection and flash vaporization of small volumes of liquid ethylene oxide into a carrier gas to minimize polymerization of the ethylene oxide and accumulation of polymerized ethylene oxide. Ethylene oxide peaks are diverted from the gas chromatograph effluent detector to stabilize baseline signal errors and avoid errors in the calculation of an impurity with an adjacent retention time peak. The systems and methods may be used for feedback, feedforward, dynamic matrix, and/or model-based predictive control of ethylene oxide purity. The systems and methods reduce lag times and errors associated with relying on laboratory analyses to make process adjustments.
    Type: Application
    Filed: December 21, 2018
    Publication date: February 4, 2021
    Inventors: Ademola D. Idowu, Louise A. Mahoney, Robert M. Callender, Clair J. Emery
  • Control and optimization of process for making ethylene oxide
    Patent number: 7851760
    Abstract: The invention pertains to a method for controlling the Limiting Oxygen Value (LOV) of a reactor for producing ethylene oxide using a tunable diode laser. The sample to be tested is extracted. A method for controlling oxygen analyzer safety shutdown for a reactor for producing ethylene oxide using a tunable diode laser is also described.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: December 14, 2010
    Inventors: James D. Tate, Louise A. Mahoney, Vernon D. Darling
  • CONTROL AND OPTIMIZATION OF PROCESS FOR MAKING ETHYLENE OXIDE
    Publication number: 20100032570
    Abstract: The invention pertains to a method for controlling the Limiting Oxygen Value (LOV) of a reactor for producing ethylene oxide using a tunable diode laser. The sample to be tested is extracted. A method for controlling oxygen analyzer safety shutdown for a reactor for producing ethylene oxide using a tunable diode laser is also described.
    Type: Application
    Filed: August 30, 2007
    Publication date: February 11, 2010
    Inventors: James D. Tate, Louise A. Mahoney, Vernon D. Darling