Method of removing H.sub.2 S from a gas stream utilizing boron-vanadium and iron complexes
US4400361A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1982 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Mar 30, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing hydrogen sulfide from sour gas streams is provided wherein the sour gas is passed in cocurrent flow relationship with a liquid alkaline absorption solution containing a vanadium-boron complex characterized by the properties of reacting with the H.sub.2 S thereby oxidizing [HS.sup.- ] to elemental sulfur in conjunction with reduction of the vanadium while the boron constituent is functional to inhibit formation of insoluble vanadium sulfide compounds. Regeneration of the absorption medium by contact with an oxygen containing gas is enhanced by the provision of an iron-polyamine organic acid oxidation catalyst in the absorption liquid. The process is a direct replacement for and may be operated far more economically than conventional Stretford processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.