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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 8858904 B1

PDFFull Text
Date of Patent:
Oct. 14, 2014

Filed:

Feb. 22, 2011

Catalyzed soot filter

Applicants:

Alfred Helmut Punke, Walle, DE;

Gerd Grubert, Hannover, DE;

Yuejin LI, Edison, NJ (US);

Ruediger Wolff, Nienburg, DE;

Stanley Roth, Yardley, PA (US);

Torsten Müller-stach, Hannover, DE;

Attilio Siani, Hannover, DE;

Kenneth Voss, Somerville, NJ (US);

Torsten Neubauer, Langenhagen, DE;

Inventors:

Alfred Helmut Punke, Walle, DE;

Gerd Grubert, Hannover, DE;

Yuejin Li, Edison, NJ (US);

Ruediger Wolff, Nienburg, DE;

Stanley Roth, Yardley, PA (US);

Torsten Müller-Stach, Hannover, DE;

Attilio Siani, Hannover, DE;

Kenneth Voss, Somerville, NJ (US);

Torsten Neubauer, Langenhagen, DE;

Assignee:

BASF Corporation, Florham Park, NJ (US);

Attorney:

Melanie L. Brown

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01D 53/56 (2006.01); B01D 53/94 (2006.01); B01J 8/02 (2006.01); C01B 21/00 (2006.01); C01B 23/00 (2006.01); C01B 25/00 (2006.01); C01B 31/00 (2006.01); C01B 33/00 (2006.01); C01B 35/00 (2006.01); C01G 28/00 (2006.01); C01G 30/00 (2006.01); B01D 50/00 (2006.01); B01D 53/34 (2006.01); B01J 23/00 (2006.01); B01J 21/00 (2006.01); F01N 3/035 (2006.01); F01N 3/10 (2006.01); F01N 13/02 (2010.01);
U.S. Cl.
CPC ...
B01D 53/9468 (2013.01); F01N 3/103 (2013.01); B01D 2255/1021 (2013.01); F01N 3/035 (2013.01); F01N 2510/0682 (2013.01); F01N 2013/023 (2013.01); F01N 2013/026 (2013.01); B01D 2255/1023 (2013.01); B01D 2258/012 (2013.01); B01D 2255/9155 (2013.01); B01D 53/944 (2013.01); Y10S 502/52712 (2013.01); Y10S 502/52713 (2013.01); Y10S 502/52718 (2013.01); Y10S 502/52719 (2013.01);
Abstract

Described is a catalyzed soot filter wherein the inlet coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the outlet coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the outlet coating is lower than the Pt concentration in the inlet coating and wherein the weight ratio of Pt:Pd in the outlet coating is in the range of from 0:1 to 2:1; and wherein the inlet coating and the outlet coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.5 to 1.5, calculated as ratio of the loading of the inlet coating (in g/inch(g/(2.54 cm))):loading of the outlet coating (in g/inch(g/(2.54 cm))). Systems include such catalyzed soot filters, methods of diesel engine exhaust gas treatment and methods of manufacturing catalyzed soot filters are also described.

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