Patents by Inventor Patrick M. Wiegand

Patrick M. Wiegand 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).

  • Control of a process for the purification of (meth)acrylic acid using on-line, near IR analysis
    Patent number: 10294185
    Abstract: An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: May 21, 2019
    Assignee: Arkema Inc.
    Inventors: Timothy D. Ligon, Olan S. Fruchey, Christopher T. Reeves, Fungau Ho, Roger L. Roundy, William G. Etzkorn, Mahmood N. A. Jawaid, Patrick M. Wiegand
  • CONTROL OF A PROCESS FOR THE PURIFICATION OF (METH)ACRYLIC ACID USING ON-LINE, NEAR IR ANALYSIS
    Publication number: 20170320804
    Abstract: An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.
    Type: Application
    Filed: July 25, 2017
    Publication date: November 9, 2017
    Inventors: Timothy D. Ligon, Olan S. Fruchey, Christopher T. Reeves, Fungau Ho, Roger L. Roundy, William G. Etzkorn, Mahmood N.A. Jawaid, Patrick M. Wiegand
  • Control of a process for the purification of (meth)acrylic acid using on-line, near IR analysis
    Patent number: 9745244
    Abstract: An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: August 29, 2017
    Assignee: Arkeme Inc.
    Inventors: Timothy D. Ligon, Olan S. Fruchey, Christopher T. Reeves, Fungau Ho, Roger L. Roundy, William G. Etzkorn, Mahmood N. A. Jawaid, Patrick M. Wiegand
  • CONTROL OF A PROCESS FOR THE PURIFICATION OF (METH)ACRYLIC ACID USING ON-LINE, NEAR IR ANALYSIS
    Publication number: 20110172462
    Abstract: An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.
    Type: Application
    Filed: September 18, 2009
    Publication date: July 14, 2011
    Applicant: Arkema Inc.
    Inventors: Timothy D. Ligon, Olan S. Fruchey, Christopher Reeves, Fungau Ho, Roger L. Roundy, William G. Etzkorn, Mahmood N. A. Jawaid, Patrick M. Wiegand
  • Fast gas chromatography method, apparatus and applications
    Patent number: 5589630
    Abstract: The present invention is directed to methods and apparatus for conducting gas chromatography more rapidly than previously disclosed. By means of the present invention the time necessary to conduct a gas chromatographic analysis can be reduced by more than 50%. The methods and apparatus employed reduce system dead volumes to prevent band broadening and mixing of the sample components as the gas sample is analyzed. The present invention also relates to the apparatus described above as applied to controlling chemical, refining, and other processes.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: December 31, 1996
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Patrick M. Wiegand, John F. Fisher, John R. Parrish, Elizabeth S. Ballard, Courtland P. Sears, III, George W. Schwarz, Jr., Cloid R. Smith, III
  • Fast gas chromatography method, apparatus and applications
    Patent number: 5437179
    Abstract: The present invention is directed to methods and apparatus for conducting gas chromatography more rapidly than previously disclosed. By means of the present invention the time necessary to conduct a gas chromatographic analysis can be reduced by more than 50%. The methods and apparatus employed reduce system dead volumes to prevent band broadening and mixing of the sample components as the gas sample is analyzed. The present invention also relates to the apparatus described above as applied to controlling chemical, refining, and other processes.
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: August 1, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Patrick M. Wiegand, John F. Fisher, John R. Parris, Elizabeth S. Ballard, Courtland P. Sears, III, George W. Schwarz, Jr., Cloid R. Smith, III