Process for flue gas desulfurization
US4595576A · kind A · utility
10Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1982 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Aug 31, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Spent absorbents resulting from desulfurization of flue gas in a spray drying-absorption process contain substantial amounts of sulfite, e.g. calcium sulfite. Said sulfite is oxidized into sulfate by heating of the spent absorbent in the presence of an oxygen-containing gas, preferably at temperatures of 350.degree.-600.degree. C. Thereby the spent absorbents may be converted into materials having industrial utility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.