Process for removal of sulfur oxides from waste gases
US4377557A · kind A · utility
7Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1981 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Nov 23, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/501
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing sulfur dioxide from waste gas is provided. The gas is first contacted with an alkaline scrubbing liquor consisting essentially of a sorbent salt in which the cation is sodium or potassium, and one of the anions is borate. The clean gas is vented and the sorbent liquor regenerated for recycle by treatment with lime to precipitate insoluble calcium-sulfur compounds for disposal and regenerate the alkalinity of the scrubbing liquor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.