Electrochemical separation and concentration of sulfur containing gases from gas mixtures
US4772366A · kind A · utility
13Cited by
2References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1987 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Mar 6, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B1/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrochemical cell is provided for removing H.sub.2 S from a gas mixture. The cell includes porous, gas diffusion electrodes and a membrane containing an aqueous alkaline polysulfide electrolyte. H.sub.2 S is reduced to polysulfide ions at one electrode and the ions migrate through the membrane to the other electrode where they are oxidized to form elemental sulfur. Another embodiment of the invention utilizes a solvent to remove the H.sub.2 S from the gas mixture. Bisulfide ions are formed and are oxidized in an electrochemical cell to form elemental sulfur. The solvent is regenerated in the cell and recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.