Patents by Inventor Barbara A. Hacker

Barbara A. Hacker 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 converting cyclic urea to corresponding diamine in a gas treating system
    Patent number: 4282194
    Abstract: Acidic gases such as carbon dioxide are removed from a normally gaseous mixture including the acidic component by contacting the gaseous mixture in an absorption zone with an acid absorbing scrubbing solution comprising a basic alkali metal compound and an activator for the compound, during which process at least a portion of the activator is converted to a cyclic urea. The solution is then transferred to the desorption zone to remove at least a portion of the absorbed acidic component. At least a portion of the partially desorbed scrubbing solution containing the cyclic urea is transferred from the desorption zone to a thermal conversion zone maintained at an elevated temperature wherein at least a portion of the cyclic urea is converted back to the activator.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: August 4, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Geoffrey R. Say, James R. Hays, Sr., Jagannathan N. Iyengar, Barbara A. Hacker