Exhaust gas-purifying catalyst, powdery material, and method of manufacturing exhaust gas-purifying catalyst
US8546296B2 · kind B2 · utility
14Cited by
8References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Dec 15, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24165
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas-purifying catalyst includes a substrate, and a catalytic layer supported by the substrate. The catalytic layer includes a support made of alumina, an oxygen storage material, an alkaline earth metal and/or a compound of alkaline-earth metal selectively supported by a surface of the support and dispersed on the surface of the support, and a precious metal supported by the surface of the support. A ratio of a number of moles of the alkaline-earth metal in the catalytic layer with respect to a volumetric capacity of the exhaust gas-purifying catalyst falls within a range of 0.0004 mol/L to 0.35 mol/L.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.