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:
Jul. 13, 1993
Filed:
Dec. 31, 1991
Yoshiaki Kintaichi, Ibaraki, JP;
Hideaki Hamada, Ibaraki, JP;
Takehiko Ito, Ibaraki, JP;
Motoi Sasaki, Ibaraki, JP;
Fujio Suganuma, Saitama, JP;
Mitsunori Tabata, Saitama, JP;
Akihiro Kitazume, Saitama, JP;
Kazushi Usui, Chiba, JP;
Tadao Nakatsuji, Osaka, JP;
Hiromitsu Shimizu, Osaka, JP;
Agency of Industrial Science and Technology, Tokyo, JP;
Petroleum Energy Center, Tokyo, JP;
Cosmo Oil Co., Ltd., Tokyo, JP;
Sakai Chemical Industry Co., Ltd., Osaka, JP;
Abstract
A process for removing nitrogen oxides from an exhaust gas by bringing the exhaust gas containing nitrogen oxides into contact with at least one catalyst selected from a polyvalent metal phosphate, a polyvalent metal sulfate or an aluminate of a transition metal of the 4th period of the Periodic Table in an oxidizing atmosphere containing excess oxygen and in the presence of a hydrocarbon or an oxygen containing organic compound. There is also disclosed a process for removing nitrogen oxides from an exhaust gas which comprises bringing the exhaust gas into contact with the above catalyst and then with an oxidation catalyst.