Exhaust emission catalyst
US4497783A · kind A · utility
17Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1982 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Aug 5, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved catalyst for the conversion of exhaust emissions from internal combustion engines comprises platinum on a refractory support and sodium or potassium or a combination of sodium and potassium in an amount sufficient to significantly broaden the A/F window for said catalyst. In place of sodium or potassium, barium may be used, although it is less effective than sodium or potassium. A preferred catalyst composition comprises platinum, palladium and rhodium on a refractory support and sodium or potassium in an amount sufficient to significantly broaden the A/F window of said catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.