Patents by Inventor Patrick Ho Sing Au-Yeung

Patrick Ho Sing Au-Yeung 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).

  • Process for the production of high purity glycol esters
    Patent number: 9481629
    Abstract: A process for the production of 2-butoxyethyl benzoate from benzoic acid and 2-butoxy ethanol wherein at least a portion of the crude reaction product is fed to a distillation column comprising a dividing wall or a pasteurizing section.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: November 1, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Andrei S. Merenov, Edward D. Daugs, Patrick Ho Sing Au-Yeung, Jason L. Trumble
  • Process for separating one or more aliphatic diamines from reductive amination reaction solvents and impurities
    Patent number: 9187403
    Abstract: The instant invention provides a process for separating one or more aliphatic diamines from reductive amination reaction solvents and impurities, and aliphatic diamines obtained via such a process. The process for separating one or more aliphatic diamines from reductive amination reaction solvents and impurities according to the instant invention comprises the steps of: (1) feeding one or more cycloaliphatic cyanoaldehydes, hydrogen, ammonia, and optionally one or more solvents into a continuous reductive amination reactor system; (2) contacting said one or more cycloaliphatic cyanoaldehydes, hydrogen, and ammonia with each other in the presence of one or more heterogeneous metal based catalyst systems at a temperature in the range of from 80° C. to about 160° C.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: November 17, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Stacie Santhany, Patrick Ho Sing Au-Yeung, Gerald W. Dare, Shawn D. Feist, Barry B. Fish, Daniel A. Hickman, David Jean, Erich J. Molitor, Abraham D. Schuitman, Todd William Toyzan
  • PROCESS FOR THE PRODUCTION OF HIGH PURITY GLYCOL ESTERS
    Publication number: 20150274635
    Abstract: A process for the production of 2-butoxyethyl benzoate from benzoic acid and 2-butoxy ethanol wherein at least a portion of the crude reaction product is fed to a distillation column comprising a dividing wall or a pasteurizing section.
    Type: Application
    Filed: September 24, 2013
    Publication date: October 1, 2015
    Inventors: Andrei S. Merenov, Edward D. Daugs, Patrick Ho Sing Au-Yeung, Jason L. Trumble
  • Processes for the production of hydrofluoroolefins
    Patent number: 8933280
    Abstract: The present invention provides continuous, gas phase, free radical processes for the production of chlorinated and/or fluorinated propenes or higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes, wherein wherein at least a portion of any intermediate boiler by-products generated by the process are removed from the process.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: January 13, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Max Markus Tirtowidjojo, Patrick Ho-Sing Au-Yeung, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt Frederick Hirsekorn, Manfred Kokott, William J. Kruper, Jr., Thomas Ulrich Luebbe, Holger Meeman, Shirley Shaw Sexton, Peter Wenzel, Marcus Wobser
  • PROCESSES FOR THE PRODUCTION OF CHLORINATED AND/OR FLUORINATED PROPENES AND HIGHER ALKENES
    Publication number: 20140031595
    Abstract: The present invention provides continuous, gas phase, free radical processes for the production of chlorinated and/or fluorinated propenes or higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes, wherein wherein at least a portion of any intermediate boiler by-products generated by the process are removed from the process
    Type: Application
    Filed: October 4, 2013
    Publication date: January 30, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES, LLC
    Inventors: Max Markus Tirtowidjojo, Patrick Ho-Sing Au-Yeung, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt Frederick Hirsekorn, Manfred Kokott, William J. Kruper, JR., Thomas Ulrich Luebbe, Holger Meeman, Shirley Shaw Sexton, Peter Wenzel, Marcus Wobser
  • PROCESS FOR SEPARATING ONE OR MORE ALIPHATIC DIAMINES FROM REDUCTIVE AMINATION REACTION SOLVENTS AND IMPURITIES
    Publication number: 20120116123
    Abstract: The instant invention provides a process for separating one or more aliphatic diamines from reductive amination reaction solvents and impurities, and aliphatic diamines obtained via such a process. The process for separating one or more aliphatic diamines from reductive amination reaction solvents and impurities according to the instant invention comprises the steps of: (1) feeding one or more cycloaliphatic cyanoaldehydes, hydrogen, ammonia, and optionally one or more solvents into a continuous reductive amination reactor system; (2) contacting said one or more cycloaliphatic cyanoaldehydes, hydrogen, and ammonia with each other in the presence of one or more heterogeneous metal based catalyst systems at a temperature in the range of from 80° C. to about 160° C.
    Type: Application
    Filed: July 30, 2010
    Publication date: May 10, 2012
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Stacie Santhany, Patrick Ho Sing Au-Yeung, Gerald W. Dare, Shawn D. Feist, Barry B. Fish, Daniel A. Hickman, David Jean, Erich J. Molitor, Abraham D. Schuitman, Todd William Toyzan