Catalyst for the purification of exhaust gases
US4808564A · kind A · utility
29Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Dec 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for the purification of exhaust gases capable of maintaining excellent durability at elevated temperatures and preventing the formation of LaAlO.sub.3, comprises a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients carried on the catalyst carrier layer. The catalyst carrier layer comprises oxides of lanthanum and cerium in which the molar fraction of lanthanum atoms to the total rare earth atoms is 0.05 to 0.20, and the ratio of the member of the total rare earth atoms to the number of aluminum atoms is 0.05 to 0.25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.