Verfahren und Vorrichtung zur Behandlung von Schwefelwasserstoff und Schwefeldioxid enthaltenden Gasen mit einer Schwefelreduzierungsstufe aus wiedergewonnenem Lösungsmittel

A process for the treatment of a gas containing H2S and SO2 is carried out by contacting the gas (3) with an organic solvent in a primary gas/liquid reactor zone.A gaseous effluent containing water and sulphur vapour and sulphur is recovered which is introduced into a secondary contact zone in appropriate conditions with a re-cycled organic solvent depleted in sulphur. A purified gas is recovered, free from sulphur vapour, and a sulphur-enriched solvent.Part of the latter is re-directed (no more than 50%) and cooled producing a suspension of sulphur crystals which are separated off, and the cooled solvent re-cycled to the secondary contact zone.At least one of the two contact zones contains a catalyst. Also claimed, is the apparatus for effecting the process.