Process for removal of nitrogen oxides from waste gas
US4119703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1977 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Mar 14, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the removal of nitrogen oxides from a waste gas containing said nitrogen oxides in conjunction with sulfur oxides is disclosed, which process comprises allowing said waste gas to come into contact with ammonia as the reducing agent at temperature in the range of from 250.degree. to 550.degree. C in the presence of a catalyst wherein an active component containing iron or copper as the active metal is supported on a silica-alumina type carrier containing not less than 60% by weight of silica and the pore volume occupied by the pores measuring 150 A or over in diameter exceeds 0.15 cc/g, for thereby causing selective catalytic reduction of said nitrogen oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.