Process for the high recovery efficiency of sulfur from an acid gas stream
US7351392B2 · kind B2 · utility
40Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2005 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Mar 11, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/17
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A combined process for the recovery of sulfur from an acid gas stream. The combined process includes both a Claus unit and a unit for treating the Claus tail gas with caustic to remove hydrogen sulfide therefrom and to biologically oxidize the hydrogen sulfide using certain types of sulfur bacteria to make elemental sulfur. The combined process provides for an exceptionally low concentration of hydrogen sulfide in the finally treated sweet gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.