Process for manufacturing sulfur from a solution of sodium sulfite
US3966891A · kind A · utility
4Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1973 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A solution of sodium sulfite or sulfide is reacted with ammonium sulfate, so as to produce a gas containing SO.sub.2 or H.sub.2 S, NH.sub.3 and H.sub.2 O, which is thereafter treated for sulfur production and NH.sub.3 recovery, and a liquid outflow containing sodium sulfate which is reacted with CO.sub.2 and NH.sub.3, in order to produce NaHCO.sub.3 and regenerate the ammonium sulfate. NaHCO.sub.3 may be converted to sodium carbonate and CO.sub.2, the latter being re-used in the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.