Catalyst for purifying exhaust gas
US5910466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G3/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a catalyst for purifying an exhaust gas, and in particular provides a catalyst for purifying an exhaust gas using a complex oxide, which is not deteriorated in its purifying performance even in a lean atmosphere containing sulfur dioxide SO.sub.2 at temperatures as high as at least 1,000.degree. C., comprising at least one of the noble metals and one or at least two elements selected from the group consisting of alkaline earth metals and Group IIIA elements, and at least one member selected from the group consisting of iron, nickel and cobalt is supported in the surface portion of the catalyst, the catalyst further comprising, as a constituent element of the complex oxide, at least one element selected from the group consisting of iron, nickel and cobalt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.