Patents by Inventor Anne K. Roby

Anne K. Roby 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).

  • Enhanced oxidation of organic chemicals
    Patent number: 5536875
    Abstract: Organic chemical oxidation reactions are carried out using pure or nearly pure oxygen and evaporative cooling. Advantageous operating results are achieved thereby, and the oxidation of organic chemicals resulting in the production of solid products or byproducts is facilitated by obviating the need for direct contact heat exchange surfaces that become coated with solid products or byproducts.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 16, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Anne K. Roby, Jeffrey P. Kingsley
  • Terephthalic acid production using evaporative cooling
    Patent number: 5523474
    Abstract: The oxidation of p-xylene to produce terephthalic acid is carried out using pure or nearly pure oxygen and evaporative cooling. By-product and waste generation are reduced, oxygen utilization is enhanced, desirable operating conditions are employed, and the need for direct contact heat exchange surfaces in the reactor vessel is obviated.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: June 4, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Jeffrey P. Kingsley, Anne K. Roby
  • Terephthalic acid production
    Patent number: 5371283
    Abstract: Oxygen or an oxygen-rich gas is used in the production of terephthalic acid in a reaction system that mitigates the flammability hazards associated therewith. Lower reactant and solvent consumption is achieved, with lower production of unwanted by-products, lower gas handling costs and lower environmental impact concerns than with conventional air based terephthalic acid production.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: December 6, 1994
    Assignee: Praxair Technology, Inc.
    Inventors: Jeffrey P. Kingsley, Anne K. Roby, Lawrence M. Litz