Exhaust gas purifying catalyst and process for purifying exhaust gas
US7396793B2 · kind B2 · utility
0Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jun 28, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying catalyst contains copper oxide, ZSM-5 and/or zeolite β, and an oxide of magnesium and/or calcium is further added thereto. A process for purifying an exhaust gas using such a catalyst is also included. By using the catalyst, NOx in an exhaust gas containing much oxygen such as exhaust gas of diesel engines can be efficiently removed and oxidation of SO2 under high-temperature conditions can be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.