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:
May. 15, 1990
Filed:
Aug. 15, 1988
Atsushi Morii, Nagasaki, JP;
Toshio Koyanagi, Nagasaki, JP;
Hiromu Takatsuka, Nagasaki, JP;
kouzou Iida, Nagasaki, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A new method for denitration by ammonia of exhaust gas containing arsenic compounds which degrades a denitrating catalyst used is disclosed as well as a method and an apparatus, based on the same principle as the above method, for regenerating an already degraded catalyst. These effects are achieved, without taking the catalyst out of the system, by adjusting the humidity and temperature of the atmosphere surrounding the catalyst filled in the denitration reactor with simple and economical means so that arsenic compounds accumulated on the catalyst surface will diffuse into the catalyst reducing their concentration on the surface, which is important for the catalytic action.