Method for catalytically purifying exhaust gas
US5294421A · kind A · utility
12Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1991 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Nov 27, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for purifying an oxygen excess exhaust gas by catalytically reducing nitrogen oxides contained in the exhaust gas, which comprises bringing a catalyst comprising at least one noble metal supported on a carrier composed mainly of an oxide or a complex oxide of at least one metal selected from rare earth metals and metals of the group IV A of the periodic table of elements into contact the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.