Recovery of sulfur dioxide from gas mixtures
US3980759A · kind A · utility
3Cited by
7References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Jan 17, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/507
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
SO.sub.2 is removed from a SO.sub.2 -containing gas mixture utilizing an aromatic amine as absorbent, followed by scrubbing the SO.sub.2 -depleted, aromatic amine-enriched effluent gas with sulfurous acid-and ammonium sulfate-containing aqueous solution to remove substantially all of the gaseous aromatic amine from the gas. The effluent gas is discharged ultimately to the atmosphere without any additional scrubbing of the gas, after its discharge from the sulfurous acid scrubbing zone, with sulfuric acid solution or any other acid solution or any acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.