| 摘要 |
The problem of chemical consumption and undesirable formation of sulfur-containing salts inherent in conventional processes, such as the Stretford and Takahax processes, for the removal of hydrogen sulfide from gas streams are substantially reduced by the use of a novel, substantially quinone-free washing solution containing solubilized vanadium, thiocyanate ions, a carboxylate complexing agent and one or more water-soluble nonquinone aromatic compounds capable of solubilizing vanadium. Hydrogen sulfide is removed from the hydrogen sulfide-containing gas stream (12) by contact with the washing solution (14). The absorbed hydrogen sulfide is converted to elemental sulfur by reaction with the washing solution. The sulfur is separated (36) and recovered. The washing solution is oxidatively regenerated (24) before being recycled (30) to the absorber (10). |
