Catalyst for purifying exhaust gases
US4849398A · kind A · utility
44Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Aug 7, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/525
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for purifying exhaust gases contains: a catalyst support, a perovskite double oxide comprising at least one alkaline earth metal oxide, lathanum oxide and cerium oxide, carried on the catalyst support, and noble metal catalyst components carried on the catalyst support. The catalyst for purifying exhaust gases according to the present invention offers an improved durability and purifying ratios for carbon monoxide CO, hydrocarbons HC and nitrogen oxides NOx.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.