AUTOMOBILE EXHAUST GAS TREATMENT CATALYST WITH RESISTANCE TO POISONING AND METHOD FOR TREATING AUTOMOBILE EXHAUST GAS

WIPO Patent Application WO2008022160

B1

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. A method for treating automobile exhaust gas using the poisoning-resistant catalysts is also provided.

JP2020185539	EXHAUST GAS PURIFICATION CATALYST DEVICE
WO/2006/008625	HYBRID CATALYST SYSTEM FOR EXHAUST EMISSIONS REDUCTION
JP2003340284	EXHAUST GAS CLEANING CATALYST AND CATALYST COATED STRUCTURE THEREOF AND EXHAUST GAS CLEANING METHOD

CHEN SHAU-LIN FRANKLIN (US)
WASSERMANN KNUT (US)
SAKAKIBARA JIN (US)

PCT/US2007/075942

April 17, 2008

August 14, 2007

Click for automatic bibliography generation  

BASF CORP (US)
CHEN SHAU-LIN FRANKLIN (US)
WASSERMANN KNUT (US)
SAKAKIBARA JIN (US)

B01D53/94; B01J23/56; B01J23/58

View/Download PDF      PDF Help

Previous Patent: SEAT BELT BUCKLE FOR USE WITH PRETENSIONER

Next Patent: METHOD AND APPARATUS FOR PRODUCING BEVERAGES FROM COFFEE BEANS USING ULTRASOUND ENERGY