Low-precious metal/high-rare earth oxide catalysts
US6540968B1 · kind B1 · utility
10Cited by
13References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 19, 1999 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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 10-30 wt. % based on the weight of the substrate. The mixed metal oxide comprises at least aluminum 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/ft3 of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.