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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.:

US 9579638 B1

PDFFull Text
Date of Patent:
Feb. 28, 2017

Filed:

Jul. 30, 2014

Ammonia slip catalyst

Applicant:

Johnson Matthey Public Limited Company, London, GB;

Inventors:

Joseph Michael Fedeyko, Glen Mills, PA (US);

Kevin Doura, Plainsboro, NJ (US);

Erich Conlan Weigert, Newtown Square, PA (US);

Julian Peter Cox, Malvern, PA (US);

Hai-Ying Chen, Conshohocken, PA (US);

Paul Joseph Andersen, Plymouth Meeting, PA (US);

Assignee:

Johnson Matthey Public Limited Company, London, GB;

Attorney:
Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 29/00 (2006.01); B01J 29/04 (2006.01); B01J 29/06 (2006.01); B01J 21/00 (2006.01); B01J 21/04 (2006.01); B01J 23/02 (2006.01); B01J 23/40 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/56 (2006.01); B01J 23/70 (2006.01); B01J 23/72 (2006.01); B01J 23/74 (2006.01); B01J 29/85 (2006.01); B01J 37/02 (2006.01); B01J 35/00 (2006.01); B01J 23/745 (2006.01); B01J 35/04 (2006.01); B01D 53/86 (2006.01);
U.S. Cl.
CPC ...
B01J 29/85 (2013.01); B01D 53/869 (2013.01); B01D 53/8628 (2013.01); B01J 23/44 (2013.01); B01J 23/72 (2013.01); B01J 23/745 (2013.01); B01J 35/0006 (2013.01); B01J 35/04 (2013.01); B01J 37/0244 (2013.01); B01J 37/0246 (2013.01); B01J 37/0248 (2013.01);
Abstract

Provided is an ammonia slip catalyst article having supported palladium in a top or upstream layer for oxidation of carbon monoxide and/or hydrocarbons, an SCR catalyst either in the top layer or in a separate lower or downstream layer, and an ammonia oxidation catalyst in a bottom layer. Also provided are methods for treating an exhaust gas using the catalyst article, wherein the treatment involves reducing the concentrations of ammonia and optionally carbon monoxide and/or hydrocarbons in the exhaust gas.

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