Process for removing NO.sub.x and SO.sub.x from a gaseous mixture
US4853193A · kind A · utility
6Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A combination gas denitrogenation and desulfurization process is provided in which a gaseous mixture comprising NO.sub.x, SO.sub.x and O.sub.2 is reacted with excess NH.sub.3 to reduce the NO.sub.x to N.sub.2 and the resulting gaseous effluent comprising the unreacted ammonia and SO.sub.x is passed to a gas desulfurization zone to form an ammonium salt of an acid of sulfur which can be recovered and used as such or converted to elemental sulfur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.