Process for recovering sulfur and hydrogen from hydrogen sulfide
US5334363A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Dec 1, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for converting hydrogen sulfide which is contained in a gaseous feed stream to elemental sulfur and hydrogen. The process comprises contacting said gaseous feed stream with a polar organic solvent having an anthraquinone, and optionally a complexing agent, dissolved therein, reacting the hydrogen sulfide gas and anthraquinone to produce sulfur and an anthrahydroquinone in the solvent, and catalytically dehydrogenating the anthrahyroquinone to anthraquinone and hydrogen. In accordance with the present invention, a relatively small quantity of water is added to a polar organic solvent thereby increasing the elemental sulfur which is precipitated and thus recovered. The addition of water prior to or during sulfur production also increases hydrogen product selectivity in the subsequent dehydrogenation of anthrahydroquinone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.