Process for removing hydrogen sulphide from gas streams
US4921682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Jun 13, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Processes for the removal of hydrogen sulphide from gas streams and for the regeneration of spent scrubbing liquor used in an absorber to remove hydrogen sulphide from a gas stream, are disclosed. In the former process, hydrogen sulphide is removed by five-valent oxovanadium which is simultaneously reduced to its four-valent state, the precipitation of which is prevented by having a sufficiently high concentration of total alkalinity present in the scrubbing solution. In the latter process the four-valent oxovanadium is oxidized to its five-valent state, preferably by an oxygen-containing gas, and a suffficently high concentration of total alkalinity is provided in the scrubbing liquor to yield a desired re-oxidation rate of the four-valent oxovanadium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.