Method of reducing sulfur oxide and nitrogen oxide content of flue gas
US4565678A · kind A · utility
7Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1984 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Dec 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Flue gas is treated by a regenerable wet scrubbing process to reduce sulfur- and nitrogen oxides by reacting with a solution containing ammonium thiosulfate and hydroxide, and a ferrous chelating agent. A portion of the spent scrubber solution is regenerated by reaction with hydrogen sulfide, flashed to hydrolyze the polysulfide content, and then returned as regenerated solution to the principal scrubbing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.