Exhaust gas purification apparatus for an internal combustion engine and a catalyst for purifying exhaust gas
US7772149B2 · kind B2 · utility
0Cited by
3References
21Claims
0Family size
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Key dates
| Filing date | Dec 6, 2006 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Sep 19, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A Cr trapping agent is disposed so that it contacts with constituting components of the substrate containing Cr. As the Cr trapping agent, an element or Ag is used, wherein the element is stronger in basicity than alkali metals or alkaline earth metals. Since the Cr trapping agent prevents transfer of Cr towards the alkali metals or alkaline earth metals, the reaction between Cr and alkali metals or alkaline earth metals is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.