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:
Aug. 25, 2015
Filed:
Feb. 24, 2012
Applicants:
Masashi Kiyosawa, Tokyo, JP;
Norihisa Kobayashi, Tokyo, JP;
Inventors:
Masashi Kiyosawa, Tokyo, JP;
Norihisa Kobayashi, Tokyo, JP;
Assignee:
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01J 38/02 (2006.01); B01J 38/04 (2006.01); B01J 21/20 (2006.01); B01J 23/92 (2006.01); B01J 38/12 (2006.01); B01J 21/06 (2006.01); B01J 23/22 (2006.01); B01J 23/30 (2006.01);
U.S. Cl.
CPC ...
B01J 38/04 (2013.01); B01J 21/20 (2013.01); B01J 23/92 (2013.01); B01J 38/12 (2013.01); B01J 21/063 (2013.01); B01J 23/22 (2013.01); B01J 23/30 (2013.01);
Abstract
Provided is a practical method for dry-separating arsenic compounds from a used NOx removal catalyst contaminated with arsenic. The method for removing arsenic compounds comprises heat-treating a NOx removal catalyst contaminated with arsenic compounds at a predetermined temperature in a reducing atmosphere while exposing the catalyst to hydrocarbon compounds (except CH) or oxygen-containing carbon compound.