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:
Jan. 24, 1978
Filed:
Sep. 07, 1976
Applicant:
Inventors:
Sanseki Moriguchi, Yokohama, JA;
Hiroshi Abe, Kanagawa, JA;
Joichi Takenaka, Yokohama, JA;
Hideyuki Yoshikoshi, Hino, JA;
Osamu Komatsu, Yokohama, JA;
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
423239 ; 252472 ;
Abstract
A method for reducing NO.sub.x gas contained in an exhaust gas to harmless N.sub.2 gas with NH.sub.3 gas using an iron oxide catalyst, characterized in that said iron oxide catalyst comprises a substance consisting essentially of hematite crystals (.alpha.-Fe.sub.2 O.sub.3), and the peak intensity of X-rays diffracted on the (110) plane of the lattice of said crystal has a ratio of 0.6 to about 1.0 to that of X-rays diffracted on the (104) plane of said crystal lattice.