Patents Represented by Law Firm Exxon Research
  • Process for removing NO.sub.x and SO.sub.x from a gaseous mixture
    Patent number: 4853193
    Abstract: A combination gas denitrogenation and desulfurization process is provided in which a gaseous mixture comprising NO.sub.x, SO.sub.x and O.sub.2 is reacted with excess NH.sub.3 to reduce the NO.sub.x to N.sub.2 and the resulting gaseous effluent comprising the unreacted ammonia and SO.sub.x is passed to a gas desulfurization zone to form an ammonium salt of an acid of sulfur which can be recovered and used as such or converted to elemental sulfur.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: August 1, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert P. Cahn, Boyd E. Hurst