Patents Examined by W. A. Langel
  • Method of reducing nitrogen oxides in a gas stream with vaporized ammonia
    Patent number: 7998444
    Abstract: The present invention is a method for selective reduction of nitrogen oxides in a gas stream with ammonia wherein the ammonia is vaporized prior to contacting it with the carrying fluid. The present invention also comprises a reducing agent dispersion system for use in substantially uniformly mixing a reducing agent with nitrogen oxides in a flue gas stream comprising a header and a plurality of lances. Further, the present invention comprises a novel reactor design for use in selective reduction of nitrogen oxides in a gas stream.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: August 16, 2011
    Assignee: Johnson Matthey Inc.
    Inventor: Yul Kwan
  • Calcination of basic ferric sulphates
    Patent number: 4102951
    Abstract: A two-step process for the calcination of basic ferric sulphates in which the basic ferric sulphate is dehydrated by heating in a relatively low temperature range and the dehydrated product is then decomposed by heating in a relatively high temperature range.
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: July 25, 1978
    Assignee: Monash University
    Inventor: Frank Lawson