Patents by Inventor Edmund J. Yang

Edmund J. Yang 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).

  • METHOD OF INHIBITING POLYMERIZATION AND FOULING IN ACRYLIC ACID AND ACRYLATE PROCESSES
    Publication number: 20160122643
    Abstract: The method of inhibiting the polymerization of a mono-ethylenically unsaturated carboxylic acid, anhydride, ester or neutralized or partially neutralized salt, e.g., an acrylic acid or ester, in an aqueous solution and in the presence of oxygen, the method comprising the step of mixing with the aqueous solution an inhibitor comprising (i) at least 50 ppm of an N-oxyl compound, e.g., 4-hydroxy-TEMPO, and (ii) a manganese ion, the N-oxyl compound and manganese ion present in a N-oxyl compound to manganese ion weight ratio of 50:1 to less than 100:1 based on the mono-ethylenically unsaturated carboxylic acid, anhydride, ester or salt.
    Type: Application
    Filed: July 1, 2015
    Publication date: May 5, 2016
    Applicant: Arkema Inc.
    Inventors: Olan S. FRUCHEY, Christopher T. REEVES, William C. BROOKS, Edmund J. YANG, Roger L. ROUNDY
  • Process for producing acrylic acid
    Patent number: 8530700
    Abstract: The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: September 10, 2013
    Assignee: Arkema Inc.
    Inventors: Fungau Ho, Olan S. Fruchey, Roger L. Roundy, William G. Etzkorn, Christopher T. Reeves, Mahmood Jawaid, Edmund J. Yang, Dennis W. Jewell
  • PROCESS FOR PRODUCING ACRYLIC ACID
    Publication number: 20120226074
    Abstract: The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.
    Type: Application
    Filed: May 11, 2012
    Publication date: September 6, 2012
    Applicant: Arkema Inc.
    Inventors: Fungau Ho, Olan S. Fruchey, Roger L. Roundy, William G. Etzkorn, Christopher T. Reeves, Mahmood Jawaid, Edmund J. Yang, Dennis W. Jewell
  • Process for producing acrylic acid
    Patent number: 8242308
    Abstract: The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: August 14, 2012
    Assignee: Arkema Inc.
    Inventors: Fungau Ho, Olan S. Fruchey, Roger L. Roundy, William G. Etzkorn, Christopher T. Reeves, Mahmood Jawaid, Edmund J. Yang, Dennis W. Jewell
  • Process for Producing Acrylic Acid
    Publication number: 20090253934
    Abstract: The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.
    Type: Application
    Filed: August 31, 2007
    Publication date: October 8, 2009
    Inventors: Fungau Ho, Olan S. Fruchey, Roger L. Roundy, William G. Etzkorn, Christopher T. Reeves, Mahmood Jawaid, Edmund J. Yang, Dennis W. Jewell