Low noble metal dosage/high rare earth element dosage oxide catalyst

Application Number: 00109312
Application Date: 2000.05.19
Publication Number: 1274615
Publication Date: 2000.11.29
Priority Information: 1999/5/19 US 09/314202
International: B01D53/94;B01J23/10
Applicant(s) Name: Ford Global Technologies Inc.
Inventor(s) Name: Huang Rongguang;Li Jun;Ronald G. Herlie
Patent Agency Code: 72002
Patent Agent: gan ling
Abstract The invention is a three-way catalyst, its method of manufacture, and use for treating exhaust gas generated by a gasoline internal combustion engine. The method comprises coating a substrate with mixed metal oxide particles in an amount of 10-30wt.% based on the weight of the substrate. The mixed metal oxide comprises at least aluminium and rare earth metals of cerium and lanthanum. Precious metals are then deposited on the oxide coating and comprise at least one of platinum and palladium overcoated with rhodium. The total loading of precious metals is about 5-35 g/ft<3> of the substrate.