Process and device for treating a gas containing hydrogen sulfide, with recycling of the reduced catalytic solution
US6589498B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2000 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/1468
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process intended for desulfurization of a gaseous feed containing hydrogen sulfide, includes at least the following stages: a) contacting the gaseous feed with a catalytic solution containing at least one polyvalent metal chelated by at least one chelating agent, under suitable conditions for oxidation of the hydrogen sulfide to elemental sulfur and concomitant reduction of the polyvalent metal from a higher oxidation level to a lower oxidation level, b) recovering on the one hand a gaseous effluent substantially freed from hydrogen sulfide and, on the other hand, the catalytic solution at least reduced and containing elemental sulfur, and c) recycling at least a fraction F1 of the catalytic solution at least reduced and containing solid elemental sulfur to absorption stage a) so as to reduce the number of sulfur grains of very small size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.