| 摘要 |
A process is described for preventing the formation of thiosulfate in oxidative hydrogen sulfide scrubbings. For this purpose, an aqueous alkaline scrubbing agent, containing an oxidizing agent, is used, the hydrogen sulfide being absorbed from the scrubbing agent in a scrubbing column and oxidized principally to elementary sulfur with reduction of the oxidizing agent. Subsequently, the scrubbing agent is regenerated for reuse by exposure to an oxygen-containing gas for the reoxidation of the oxidizing agent. A thiocyanate is added to the scrubbing agent, advantageously in a concentration of 0.06 to 0.5 mol/l, preferably 0.3 to 0.4 mol/l.
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