Process for removing nitrogen oxides from exhaust gases
US5227145A · kind A · utility
23Cited by
3References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 31, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Dec 31, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2275/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing nitrogen oxides from an exhaust gas by bringing the exhaust gas containing nitrogen oxides into contact with at least one catalyst selected from a polyvalent metal phosphate, a polyvalent metal sulfate or an aluminate of a transition metal of the 4th period of the Periodic Table in an oxidizing atmosphere containing excess oxygen and in the presence of a hydrocarbon or an oxygen containing organic compound. There is also disclosed a process for removing nitrogen oxides from an exhaust gas which comprises bringing the exhaust gas into contact with the above catalyst and then with an oxidation catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.