Patents by Inventor Gerard Delahay

Gerard Delahay 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 simultaneously abating nitric oxides and nitrous oxides in gases containing them
    Patent number: 6890501
    Abstract: The invention concerns a method for purifying flue gases before they are released into the atmosphere of their nitrogen oxides N2O and NOx by reaction with ammonia by causing them to circulate at temperatures between 200 and 600° C. on a catalyst based on beta-zeolite loaded with iron. The invention is particularly useful for treating tail gases from factories producing nitric acid.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: May 10, 2005
    Inventors: Gerard Delahay, Mathias Mauvezin, Genevieve Neveu, Bernard M. Coq, Bernard Neveu
  • Method for simultaneously abating nitric oxides and nitrous oxides in gases containing them
    Publication number: 20020044902
    Abstract: The invention concerns a method for purifying flue gases before they are released into the atmosphere of their nitrogen oxides N2O and NOx by reaction with ammonia by causing them to circulate at temperatures between 200 and 600° C. on a catalyst based on beta-zeolite loaded with iron. The invention is particularly useful for treating tail gases from factories producing nitric acid.
    Type: Application
    Filed: August 17, 2001
    Publication date: April 18, 2002
    Inventors: Gerard Delahay, Mathias Mauvezin, Bernard Neveu, Genevieve Neveu, Bernard M. Coq
  • Process for the removal from gases of nitrogen oxides NOx by selective catalytic reduction (SCR) using ammonia over zeolite catalysts not causing the formation of nitrogen protoxide
    Patent number: 6221324
    Abstract: Zeolites partially exchanged with copper, in particular faujasites, in which the copper does not largely occupy the small cages (for example the sodalite cages of the faujasites), are used as non-nitrogen-protoxide-generating SCR catalysts. Particular attention is drawn to certain mixed rare-earth/copper zeolites. The selectivity of the reduction of NOx to N2 is correlated with the TPR diagram of the catalysts.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: April 24, 2001
    Assignee: Grand-Paroiesse S.A.
    Inventors: Bernard Coq, Gerard Delahay, Francois Fajulas, Bernard Neveu, Jean-Bernard Peudpiece, Stéphane Kieger