Process for purifying gases containing sulphur dioxide
US4559212A · kind A · utility
4Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1984 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Sep 6, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/507
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for removal of sulphur dioxide from exhaust gases by absorption in an aqueous solution containing ions of adipic acid, and stripping of sulphur dioxide with steam. Solid adipic acid is added to the absorption solution before or during the steam stripping in such an amount that all the acid is dissolved at the stripping temperature, and after the stripping the solution is cooled to substantially below the absorption temperature to precipitate solid adipic acid which is separated off and is added again after the absorption which takes place with a solution which is unsaturated with adipic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.