Catalyst for purifying exhaust gas from vehicles
US3931050A · kind A · utility
30Cited by
4References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 12, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Apr 12, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/2063
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for purifying exhaust gas from vehicles comprises a monolithic carrier having a plurality of exhaust gas passages penetrating through the carrier, a layer of active refractory metallic oxide such as .gamma.-alumina, containing 1 to 20% by weight of a catalytic metal such as platinum deposited as first layer on inside surfaces of said plurality of the passages, and a layer of exhaust gas-permeable refractory metallic oxide such as .gamma.-alumina free from a catalytic metal deposited as an outermost layer further upon the first layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.