Process employing single-stage reactor for recovering sulfur from H.sub.2 S -
US5928620A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Sep 10, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/8612
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Elemental sulfur is recovered from the hydrogen sulfide present in natural gas or other process gases by passing the hydrogen sulfide contaminated gas through a hydrogen sulfide absorber so as to obtain a natural or other process gas having a diminished amount of hydrogen sulfide and stripping the hydrogen sulfide out the resulting hydrogen sulfide rich solution so as to obtain a hydrogen sulfide rich gas; feeding the hydrogen sulfide rich gas and sulfur dioxide into a reactor so that the following reaction takes occurs, 2H.sub.2 S+SO.sub.2 .fwdarw.3/2S.sub.2 +2H.sub.2 O under such conditions that there is approximately a 50 percent stoichiometric excess of hydrogen sulfide; combusting the residual, unreacted hydrogen sulfide to convert it into sulfur dioxide, and passing the resulting sulfur dioxide back into the reactor where the reaction between hydrogen sulfide and sulfur dioxide occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.