Patents by Inventor Karen J. Wright

Karen J. Wright 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).

  • Argon recovery from partial oxidation based ammonia plant purge gases
    Patent number: 5100447
    Abstract: The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a pressure swing adsorption system to remove carbon monoxide, methane and part of the nitrogen thereby producing a fraction containing an increased amount of argon, and (b) passing the argon fraction to a cryogenic fractional distillation system to remove hydrogen and the remaining nitrogen in the fraction as a distillate product and to produce a pure argon product.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: March 31, 1992
    Assignee: The BOC Group, Inc.
    Inventors: Ramachandran Krishnamurthy, Mark J. Andrecovich, Donald L. MacLean, Karen J. Wright