The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1990
Filed:
Apr. 04, 1988
Applicant:
Inventors:
Christian Hamon, Saint-Nazaire, FR;
Yannick Le Goff, Saint-Nazaire, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C01B / ;
U.S. Cl.
CPC ...
423239 ; 423235 ;
Abstract
A catalytic composition for selective reduction of nitrogen oxides comprising, as active material, mordenite in ammonium or acid form, with a residual sodium content less than 1000 ppmw, representing 70 to 95% of the total weight of the catalytic composition, the remainder comprising a binder. The active material can also be in the form of small-pore mordenite exchanged with copper ions. The catalytic composition can be used for the purification of effluents with containing any nitrogen oxide, in particular for depolluting residual gases rejected into the atmosphere during the production of nitric acid.