Patents by Inventor David F. Greene

David F. Greene 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).

  • Regenerating flue gas desulfurization catalysts with reducing gas
    Patent number: 3989798
    Abstract: Flue gas is desulfurized by absorbing it onto a selective absorbent-catalytic material. The absorbed SO.sub.2 is recovered by contacting it in a desorption cycle with a reducing desorption gas. In one embodiment, multiple absorbent beds are employed and alternate absorption-desorption cycles are used in each of the multiple beds with the flue gas and the desorption gas used alternately. The sulfur oxide is recovered in concentrated form in the desorption gas stream and is then utilized as feed in a conventional sulfuric acid plant yielding concentrated sulfuric acid.
    Type: Grant
    Filed: July 23, 1973
    Date of Patent: November 2, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: David F. Greene, Robert J. Lang, Albert B. Welty, Jr.