Patents Examined by Timothy C Vandy
  • Process for removal of nitric oxides and sulfur oxides from flue gases
    Patent number: 6214308
    Abstract: A two stage method is described for the removal of NOx and SOx from flue gas. The first stage removes all NOx by sodium sulfite sorbent injection. The second stage removes SOx by sodium bicarbonate injection. The sodium sulfite product formed in the second stage is transferred to the first stage for injection.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: April 10, 2001
    Assignee: The University of Cincinnati
    Inventors: Timothy C. Keener, Soon-Jai Khang, Antoinette Weil Stein
  • Natural gas treatment process
    Patent number: 6096280
    Abstract: Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide in an autogeneously-formed aqueous acid medium according to the equation: SO.sub.2 +2H.sub.2 S.fwdarw.2H.sub.2 O+3S the sulfur being removed from the aqueous phase. Carbonyl sulfide and/or carbon disulfide is removed from gas streams by hydrolysis to hydrogen sulfide in the presence of a weak organic base catalyst, such as quinoline, with the hydrogen sulfide reacting with sulfur dioxide to form sulfur.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: August 1, 2000
    Assignee: Apollo Environmental Systems Corp.
    Inventors: David T. R. Ellenor, Silvano Meffe, James W. Smith, Peter S. Walton