Invention Grant
- Patent Title: Catalyzed soot filter with layered design
- Patent Title (中): 催化烟灰过滤器分层设计
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Application No.: US13469560Application Date: 2012-05-11
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Publication No.: US08524182B2Publication Date: 2013-09-03
- Inventor: Gerd Grubert , Alfred Punke , Torsten Neubauer , Ruediger Wolff , Stanley Roth , Yuejin Li , Torsten Müller-Stach , Marcus Hilgendorff
- Applicant: Gerd Grubert , Alfred Punke , Torsten Neubauer , Ruediger Wolff , Stanley Roth , Yuejin Li , Torsten Müller-Stach , Marcus Hilgendorff
- Applicant Address: DE Ludwigshafen US NJ Florham Park
- Assignee: BASF SE,BASF Corporation
- Current Assignee: BASF SE,BASF Corporation
- Current Assignee Address: DE Ludwigshafen US NJ Florham Park
- Agency: Servilla Whitney LLC
- Main IPC: B01D46/00
- IPC: B01D46/00 ; B01D53/94 ; B01J23/40 ; B01J35/04 ; B05D7/22 ; F01N3/10 ; F01N3/28

Abstract:
Disclosed is a catalyzed soot filter with layered design wherein the first coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the second coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the second coating is lower than the Pt concentration in the first coating, and wherein the weight ratio of Pt:Pd in the second coating is in the range of from 1:1 to 0:1; and wherein the first coating and the second coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.25 to 3, calculated as ratio of the loading of the first coating (in g/inch3 (g/(2.54 cm)3)): loading of the second coating (in g/inch3 (g/(2.54 cm)3)).
Public/Granted literature
- US20120288427A1 Catalyzed Soot Filter With Layered Design Public/Granted day:2012-11-15
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