Method for the continuous reduction of sulphur dioxide-containing gases using coal or carbon
US5039507A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1987 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jun 12, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/0482
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the continuous reduction of sulphur dioxide-containing gases essentially free of molecular oxygen, using coal or carbon, which comprises introducing the sulphur dioxide-containing gases into a coal-filled or carbon-filled reactor divided into at least three temperature zones, the temperature of which continuously increases in the direction of flow, including an inlet zone at a temperature of 150.degree. to 200.degree. C., a middle zone having a temperature of 300.degree. to 700.degree. C. and an outlet zone having a temperature of 900.degree. to 1100.degree. C. and passing the sulphur dioxide-containing gases through the zones so that the gases are heated to a final temperature of about 900.degree. to 1100.degree. C. in the outlet zone of the reactor and the sulphur dioxide is reduced to sulfur in the individual temperature zones. In a preferred embodiment, the sulphur dioxide-containing gases are introduced into a reactor having four temperature zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.