Selective catalytic reduction of nitrogen oxides
US5612010A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 30, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jan 30, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2251/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The selective catalytic reduction of nitrogen oxides to nitrogen is effected by reacting nitric oxide, nitrogen dioxide or a mixture thereof with a reducing agent consisting of an aliphatic carboxylic acid having 1 to 5 carbon atoms at a temperature ranging from about 250.degree. to, about 600.degree. C., in the presence of a catalyst comprising a metal oxide selected from the group consisting of vanadium oxide, copper oxide, nickel oxide and iron oxide, the catalyst being supported on a porous carrier. The process of the invention enables one to substantially completely reduce NO.sub.x to harmless N.sub.2 in an efficient, environmentally friendly and cost-effective manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.