Treatment of a gas stream containing hydrogen sulphide
US6616908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/0408
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Sour gas containing hydrogen sulphide has hydrogen sulphide absorbed therefrom in an absorbent in a vessel 4. A hydrogen sulphide rich gas stream is formed by desorbing hydrogen sulphide from the absorbent in a vessel 12. The resulting hydrogen sulphide rich gas stream is partially burned in a furnace 32. Resulting sulphur dioxide reacts therein with residual hydrogen sulphide to form sulphur vapor which is extracted in a condenser 44. Residual sulphur dioxide and sulphur vapor are reduced to hydrogen sulphide in catalyst stage 54 of a reactor 50. Water vapor is removed from the resulting reduced gas stream by direct contact with water in a quench tower 60. At least part of the resulting water vapor depleted gas stream is sent to the vessel 4 with the incoming sour gas stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.