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:
Feb. 09, 1999
Filed:
Sep. 30, 1997
Applicant:
Inventors:
Takeshi Tabata, Toyonaka, JP;
Mikako Kokitsu, Toyonaka, JP;
Osamu Okada, Osakasayama, JP;
Giuseppe Bellussi, Piacenza, IT;
Luigina Maria Sabatino, Milanese, IT;
Assignee:
Osaka Gas Company Limited, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
4232392 ; 4232132 ; 4232135 ;
Abstract
The present invention relates to a process for the catalytic reduction of nitrogen oxides contained in exhaust gases from combustion, which process comprises bringing said exhaust gases into contact with a Beta Zeolite exchanged with suitable amounts of cobalt salts, in the presence of a light hydrocarbon as the reducing agent. The present invention relates also to a catalyst for such a process, which catalyst comprises a Beta zeolite exchanged with cobalt salts, characterized by a Co: zeolite AL molar ratio of<0.5.