Pollution control catalyst for internal combustion engine exhaust system/catalytic converter and process for its preparation
US4492769A · kind A · utility
88Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1983 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Jul 25, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pollution control catalyst for a catalytic converter within the exhaust system of an internal combustion engine is facilely prepared by (i) coating/impregnating a catalyst support with palladium and at least one base metal catalyst, (ii) activating the step (i) catalyst, (iii) next coating/impregnating the step (ii) activated catalyst with at least one platinum group precious metal other than palladium, or combination of palladium and at least one other platinum group precious metal, and (iv) then activating the step (iii) catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.