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. 28, 2006
Filed:
Oct. 26, 2000
Yasuyoshi Kato, Kure, JP;
Kouichi Yokoyama, Kure, JP;
Masatoshi Fujisawa, Kure, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention is to provide (i) a catalyst which does not require an activation of catalyst components by means of a calcination which has become a hindrance in the way of obtaining a catalyst having a high activity through a conventional technology and in which catalyst the compositing of vanadium with molybdenum is contemplated more than enough; ii) a method for producing the catalyst; (iii) a catalyst having an activity, especially having an activity at low temperatures and a durability both greatly increased; (iv) a catalyst compound for purifying an exhaust gas, in which compound the ratio of vanadium atom to molybdenum atom (V/Mo) is 3/2 or close thereto and which compound is expressed by the rational formula (NH)MoVOwherein x is 2.8 to 3.2; and (v) a method for producing the catalyst compound through a step for reacting molybdenum oxide (MoO) with ammonium metavanadate (NHVO) in the co-presence of water for a prescribed period of time.