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:
Jun. 06, 1995
Filed:
Aug. 23, 1993
Yasuhide Kano, Sodegaura, JP;
Yoshimi Kawashima, Sodegaura, JP;
Toshiaki Hayasaka, Sodegaura, JP;
Hiroshi Akama, Yokohama, JP;
Idemitsu Kosan Company Limited, Tokyo, JP;
Nissan Motor Co., Ltd., Tokyo, JP;
Abstract
An exhaust gas purification catalyst of high resistance which allows highly effective purification of nitric oxide into nontoxic gas, even for an exhaust gas containing oxygen at a high concentration. A carrier of the catalyst includes crystalline pentasil-type aluminosilicate and supports copper and phosphori, the amount of the phosphori being supported ranges from 0.01% to 6.0% by weight as a conversion to P.sub.2 O.sub.5, and ratio of the phosphorus to the copper, i.e., P/Cu (molar ratio) is in 0<(P/Cu).ltoreq.0.7. A method of reducing and eliminating a nitrogen oxide in an exhaust gas in the presence of a hydrocarbon having a ratio of an overall THC concentration/NO.sub.x concentration of 0.5-50 at a reaction temperature of 200.degree.-800.degree. C. in an oxidative atmosphere.