Process for reducing nitrogen oxides from exhaust gas
US5270024A · kind A · utility
99Cited by
10References
13Claims
0Family size
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Key dates
| Filing date | Aug 31, 1990 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Aug 31, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for reducing nitrogen oxides from an exhaust gas containing the same in an oxygen rich atmosphere comprising (i) a zeolite having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of at least 10, (ii) copper, and (iii) a rare earth ion, an alkaline earth metal and/or a valence variable metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.