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:
Apr. 19, 1977
Filed:
Aug. 27, 1974
Masakazu Oshimura, Ibaraki, JA;
Akira Kawakami, Takatsuki, JA;
Hiroaki Hosoda, Moriguchi, JA;
Osamu Okamoto, Ibaraki, JA;
Osamu Watanabe, Suita, JA;
Shinichi Fujii, Osaka, JA;
Satoru Yamaguchi, Suita, JA;
Noboru Odani, Ibaraki, JA;
Yoshizo Koori, Osaka, JA;
Hitachi Maxell, Ltd., Osaka, JA;
Abstract
The reduction of nitrogen oxides involves the passage of gases containing nitrogen oxides at higher than 500.degree. C. over a catalyst comprising cerium oxide and nickel oxide in the CeO.sub.2 /NiO molar ratio of about 0.05 : 1 to 2.5 : 1 and when desired an addition thereto of rhodium in an amount of from about 7.5 to 25 parts by weight per 100 parts by weight of the nickel oxide and cerium oxide composition and when desired an addition to said nickel oxide and cerium oxide composition of ruthenium in an amount of about 10 to 50 parts by weight or an addition to said composition containing rhodium of ruthenium in an amount of about 15 to 50 parts by weight per 100 parts by weight of the nickel oxide and cerium oxide composition. Also, when desired, an addition to said composition of one or more metal sulfides and an addition to said composition of one or more metal oxides is utilized.