Patents by Inventor Patrick Maroney

Patrick Maroney 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).

  • Method for removal of SO.sub.2 and NO.sub.x from combustion gases by metal chelation and thermal reduction
    Patent number: 4957716
    Abstract: A process is provided for removing nitrogen oxides and sulfur dioxide from gaseous mixtures in the presence of a metal chelating agent. These gaseous contaminants are converted to hydroxylaminedisulfonates which are decomposed to ammonium ions and sulfate ions at pH of 4.2 or less. This decomposition step also converts the metal ion of the metal chelating agent to a reusable form. The ammonium ions are separated by column sorption, eluted and thermally reacted with nitrogen oxides to form nitrogen and water. The sulfate ions are removed as a sulfate salt precipitate.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: September 18, 1990
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Joseph E. Cichanowicz, Patrick Maroney