Catalyst for purifying exhaust gas
US5906959A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Jul 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a catalyst for purifying an exhaust gas using a complex oxide having good heat-resistant and a purification performance which does not undergo degradation, particularly in a lean atmosphere at a high temperature of about 1,000.degree. C., by using the complex oxide containing platinum and at least one member of element selected from the group from an alkaline earth metal element and the Group IIIA element and, furthermore, by using at least one member of platinum complex oxides selected from the group of those Pt complex oxides expressed by the chemical structural formulas X.sub.4 PtO.sub.6 (X=Ca, Sr, Ba, Mg), X'.sub.2 Pt.sub.2 O.sub.7 (X'=Sc, La, Pr), SrX"PtO.sub.6 (X"=Co, Ni, Cu), Ba.sub.2 ZPtO.sub.6 (Z=Pr, Ce) and Ba.sub.8 Y.sub.3 Pt.sub.4 O.sub.17.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.