Patent ID: 8500865

Claim:
A method of deacidizing a gaseous effluent comprising at least one acid compound of the group made up of hydrogen sulfide and carbon dioxide wherein the gaseous effluent is contacted with an absorbent solution in a contacting zone so as to obtain gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property of forming two separable liquid phases when it has absorbed an amount of acid compounds and it is heated, and wherein the absorbent solution laden with acid compounds is regenerated by carrying out the following stages: a) distilling at least part of the absorbent solution laden with acid compounds in a first regeneration zone so as to produce a partly regenerated absorbent solution, b) withdrawing at least part of the partly regenerated absorbent solution from the first regeneration zone and separating the solution withdrawn into a fraction enriched in acid compounds and a fraction depleted in acid compounds, c) distilling said fraction enriched in acid compounds obtained in stage b) in a second regeneration zone so as to produce a regenerated absorbent solution, wherein, in stage c), at least one complementary stage of withdrawing at least part of the absorbent solution circulating in the second regeneration zone is carried out, the absorbent solution withdrawn is separated into a liquid enriched in acid compounds and a liquid depleted in acid compounds, the liquid depleted in acid compounds being recycled to the contacting zone and the liquid enriched in acid compounds being fed again into the second regeneration zone, and d) recycling at least said fraction depleted in acid compounds and said regenerated absorbent solution to the contacting zone.