NOVELTY - A gas stream is contacted with aqueous absorbent solution to obtain acidic contaminant-enriched aqueous absorbent solution which is subjected to conditions which allow formation of multi-phase mixture comprising acidic contaminant-enriched gaseous phase, acidic contaminant-depleted liquid phase and acidic contaminant-enriched liquid phase. Acidic contaminant-enriched gas stream from regeneration of multi-phase mixture is cooled to obtain cooled mixture. The cooled mixture is separated and recycled, in order to remove acidic contaminants from gas stream.    USE - Removal of acidic contaminants e.g. carbon dioxide, hydrogen sulfide, carbonyl sulfide, methanethiol and ethanethiol from gas stream e.g. natural gas stream (claimed), combustion gas, synthesis gas and air stream.    ADVANTAGE - The method enables easy and effective removal of acidic contaminants, reduces mass transfer barriers between acid contaminant-enriched fraction and stripping gas, differences in liquid fraction hold-up and residence time and entrainment of acid contaminant-depleted phase, removes acidic contaminant-depleted gas stream, enables efficient recycling of at least portion of acidic contaminant-enriched liquid phase, improves phase separation inside the regenerator vessel, due to high surface area internals, and reduces effectiveness of regeneration process by providing additional mass transfer barrier and enhancing entrainment of acidic contaminant-depleted phase, and entrainment of amine rich liquid by acid contaminants flashing from acid contaminant-enriched phase through acid contaminant-depleted and amine rich phase.    DETAILED DESCRIPTION - A gas stream is contacted with aqueous absorbent solution which absorbs acidic contaminants, to obtain acidic contaminant-enriched aqueous absorbent solution and acidic contaminant-depleted gas stream. At least portion of acidic contaminant-enriched absorbent solution is subjected to conditions which allow formation of multi-phase mixture comprising acidic contaminant-enriched gaseous phase, acidic contaminant-depleted liquid phase and acidic contaminant-enriched liquid phase. At least portion of the multi-phase mixture is subjected to regeneration treatment in regenerator vessel (12) to obtain acidic contaminant-enriched gas stream, acidic contaminant-depleted liquid phase and acidic contaminant-enriched liquid phase. At least portion of the acidic contaminant-enriched gas stream is cooled to obtain cooled mixture comprising acidic contaminant-enriched gaseous phase and condensate liquid phase. The cooled mixture is introduced into separator vessel (26) to separate the cooled mixture into acidic contaminant-enriched gaseous phase and condensate liquid phase. The condensate liquid phase is withdrawn from the separator vessel, and recycled, in order to remove acidic contaminants from gas stream.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of removal of acidic contaminants from gas stream.    Pump (6)    Heat exchanger (11)    Regenerator vessel (12)    Pump (22)    Separator vessel (26)