07749472 is referenced by 48 patents and cites 61 patents.

The present invention provides for novel poisoning-resistant catalysts used for automobile exhaust gas treatment systems. To alleviate the detrimental affects of engine oil and/or fuel additive poisoning the present invention provides for an overcoat layer comprising a porous refractory oxide and one or more base metal oxides, which is coated over one or more precious metal containing washcoat layers. The overcoat of the present invention prevents phosphorous as well as other poisoning deposits, from fouling and/or negatively interacting with the underlying precious metal containing washcoats. In an alternative embodiment, the present invention provides for the coating of the upstream end of a catalytic member by the overcoat layer, thereby creating an upstream poison capture zone.

Title
Phosgard, a new way to improve poison resistance in three-way catalyst applications
Application Number
11/504247
Publication Number
7749472 (B2)
Application Date
August 14, 2006
Publication Date
July 6, 2010
Inventor
Jin Sakakibara
Edison
NJ, US
Knut Wassermann
Princeton
NJ, US
Shau Lin Franklin Chen
Piscataway
NJ, US
Agent
Drinker Biddle & Reath
Bronwen M Loeb
Assignee
BASF Corporation
NJ, US
IPC
C01G 30/00
C01G 28/00
C01B 35/00
C01B 33/00
C01B 31/00
C01B 25/00
C01B 23/00
C01B 21/00
B01D 53/94
B01D 53/56
B01J 8/02
B01J 23/00
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