Method of removing H.sub.2 S from a gas stream utilizing boron-vanadium, quinone solution and iron scavaging composition
US4460554A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1983 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Mar 31, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/1493
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing hydrogen sulfide from sour gas streams is disclosed which is carried out in processing equipment which includes steel components resulting in iron from the steel slowly dissolving in the alkaline H.sub.2 S absorption medium. The solubilized iron tends to react with the hydrogen sulfide to form iron sulfide which further oxidizes to produce sodium thiosulfate. The preferred absorption medium includes a metal vanadate and boron complex, a quinone type reoxidation catalyst and a metal ferri or ferrocyanide decahydrate compound capable of reacting with the solubilized iron in the alkaline absorption medium to form a precipitate which is unreactive with the dissolved hydrogen sulfide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.