Patents by Inventor George D. Grab

George D. Grab 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 the removal of nitrogen oxides from nitric acid plant tail gas
    Patent number: 4562052
    Abstract: The present invention involves a process for removing nitrogen oxides from an off gas stream, such as nitric acid plant tail gas. The off gas is scrubbed with concentrated nitric acid to remove nitrogen oxides to a concentration below about 200 ppm. The nitric acid used in the scrubbing step is subsequently stripped of recovered nitrogen oxides which can be recycled back to a nitric acid plant. The oxidized nitric acid is recovered as concentrated nitric acid which can be used in the initial scrubbing step and/or recovered as product.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: December 31, 1985
    Assignee: Air Products and Chemicals, Inc.
    Inventors: George D. Grab, Sheldon W. Dean