Process for the recovery of sulfur from Claus tail gas streams
US7311891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jan 29, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/40086
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a solid, sulfation resistant adsorbent bed at relatively low temperatures to extract the sulfur oxides and retain them as sulfur compounds, thus forming a sulfur oxide depleted gas stream. The adsorbent bed is then contacted with an inert or reducing gas stream to reduce the retained sulfur compounds to sulfur and/or sulfur dioxide and thereby form an enriched sulfur and/or sulfur dioxide bearing stream. The elemental sulfur is recovered and/or the sulfur dioxide bearing stream may be recycled to the Claus unit for further conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.