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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 10512901 B1

PDFFull Text
Date of Patent:
Dec. 24, 2019

Filed:

Mar. 13, 2014

Selective catalytic reduction catalyst system

Applicant:

Basf Corporation, Florham Park, NJ (US);

Inventor:

Weiyong Tang, East Brunswick, NJ (US);

Assignee:

BASF Corporation, Florham Park, NJ (US);

Attorney:

Womble Bond Dickinson (US) LLP

Primary Examiner:

Elizabeth D Wood

Int. Cl.
CPC ...
B01J 29/06 (2006.01); B01J 29/072 (2006.01); F01N 3/20 (2006.01); B01J 23/22 (2006.01); B01J 23/30 (2006.01); B01D 63/06 (2006.01); B01D 69/12 (2006.01); B01D 69/14 (2006.01); B01D 71/02 (2006.01); B01D 53/94 (2006.01); B01J 37/02 (2006.01); B01J 35/00 (2006.01); B01J 23/02 (2006.01); B01J 23/10 (2006.01); B01J 23/72 (2006.01); B01J 23/745 (2006.01); B01J 29/72 (2006.01); B01J 29/85 (2006.01); B01J 21/04 (2006.01); B01J 21/06 (2006.01); B01J 29/70 (2006.01); B01J 29/76 (2006.01); B01J 37/00 (2006.01); B01J 29/50 (2006.01);
U.S. Cl.
CPC ...
B01J 29/072 (2013.01); B01D 53/9404 (2013.01); B01D 53/9418 (2013.01); B01D 53/9472 (2013.01); B01D 53/9477 (2013.01); B01D 63/066 (2013.01); B01D 69/12 (2013.01); B01D 69/141 (2013.01); B01D 71/024 (2013.01); B01D 71/028 (2013.01); B01J 21/04 (2013.01); B01J 21/063 (2013.01); B01J 21/066 (2013.01); B01J 23/02 (2013.01); B01J 23/10 (2013.01); B01J 23/22 (2013.01); B01J 23/30 (2013.01); B01J 23/72 (2013.01); B01J 23/745 (2013.01); B01J 29/061 (2013.01); B01J 29/7015 (2013.01); B01J 29/72 (2013.01); B01J 29/723 (2013.01); B01J 29/763 (2013.01); B01J 29/85 (2013.01); B01J 35/0006 (2013.01); B01J 37/0036 (2013.01); B01J 37/0244 (2013.01); B01J 37/0246 (2013.01); F01N 3/2066 (2013.01); B01D 2251/2062 (2013.01); B01D 2251/2067 (2013.01); B01D 2255/2047 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/20707 (2013.01); B01D 2255/20715 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/20776 (2013.01); B01D 2255/40 (2013.01); B01D 2255/50 (2013.01); B01D 2255/9022 (2013.01); B01D 2255/9032 (2013.01); B01D 2255/911 (2013.01); B01D 2258/012 (2013.01); B01D 2325/10 (2013.01); B01J 29/50 (2013.01); F01N 2510/0682 (2013.01); F01N 2510/0684 (2013.01); F01N 2570/18 (2013.01); Y02C 20/10 (2013.01); Y02T 10/24 (2013.01); Y10S 502/52712 (2013.01); Y10S 502/52713 (2013.01);
Abstract

Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher Nformation and lower NO formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower Nformation and higher NO formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

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