Exhaust gas cleaning catalyst and process for producing the same
US7781367B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Dec 11, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to an exhaust gas cleaning catalyst, and aiming at providing a catalyst which has a higher catalytic activity than that of conventional catalysts and, in particular, a strong ability to oxidize nitrogen monoxide. The present invention relates to an exhaust gas cleaning catalyst whose catalytic component is supported on a carrier, characterized in that the catalytic component is platinum colloid which has an average particle size of 80 nm to 120 nm, a particle size D20, a 20% cumulative particle size distribution from smaller particle size side, of 50 nm or more, and a particle size D90, a 90% cumulative particle size distribution from smaller particle size side, of 200 nm or less. The exhaust gas cleaning catalyst of the present invention has a high catalytic activity for cleaning exhaust gases and, in particular, a strong ability to oxidize nitrogen monoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.