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. 02, 1999
Filed:
Nov. 18, 1997
Applicant:
Inventors:
Philippe Barthe, Saint Martin Du Tertre, FR;
Pierre Macaudiere, Asnieres/Seine, FR;
Thierry Seguelong, Nanterre, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B01J / ;
U.S. Cl.
CPC ...
4232371 ; 4232132 ; 4232135 ; 502514 ; 502524 ;
Abstract
Oxygen-rich exhaust gases, for example those emanating from internal combustion engines, e.g., diesel engines, are catalytically treated/converted to reduce emissions of NO.sub.x, in the presence of a catalytically effective amount of a spinel mass oxide essentially having the formula ZnAl.sub.2 O.sub.4 which was prepared by forming a solution or suspension of the salts of the constituent elements of the mass oxide, drying by atomizing the solution or suspension and calcining the salts of the constituent elements of the mass oxide so as to result in the spinel mass oxide.