Removal of acidic gases by means of an absorbent comprising a stripping aid

摘要

A process for removing acidic gases from a fluid stream, in which a) the fluid stream is treated with an absorption liquid which comprises at least one amine, a stripping aid and water, said stripping aid being selected from water-miscible liquids whose boiling temperature at standard pressure is lower than that of water, b) the treated fluid stream is treated with a liquid aqueous phase in order to transfer entrained stripping aid at least partly to the aqueous phase, c) the laden aqueous phase is heated in order to at least partly drive out the stripping aid, and d) the aqueous phase thus regenerated is cooled and recycled at least partly into step b). The stripping aid promotes the regeneration of the absorbent by stripping. Emissions of the stripping aid via the treated fluid stream are avoided by washing the treated fluid stream with a liquid aqueous phase.