Process for removing SO.sub.2 and NO.sub.x from gases
US4130628A · kind A · utility
3Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Aug 22, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is disclosed for scrubbing SO.sub.2 and NO.sub.x containing gases with iron sulfide. The reaction proceeds only to the formation of FeS.sub.2 and FeSO.sub.4 without significant formation of sulfur or iron oxide. The reaction products are subsequently regenerated to FeS by heating and can be recycled for further scrubbing operations; elemental sulfur is recovered as a by-product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.