Method of producing sulfur from sulfur dioxide
US4029752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1974 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Apr 22, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/164
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for reducing sulfur dioxide wherein ammonia is used as the reducing agent. The reduction may be accomplished either thermally or catalytically and the principal products obtained will be elemental sulfur and/or hydrogen sulfide, depending principally upon the particular conditions and relative reactant concentrations actually employed. The sulfur dioxide may be derived from essentially any source. In a preferred embodiment, however, the sulfur dioxide will be derived from a flue gas stream and the same will be separated therefrom with an absorption process wherein ammonia (on an aqueous ammoniacal solution) is also used as the absorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.