PROCEDE D'ABSORPTION SELECTIVE DU SULFURE D'HYDROGENE D'UN EFFLUENT GAZEUX PAR UNE SOLUTION ABSORBANTE A BASE DE 1,2-BIS (DIMETHYLAMINOETHOETHOXYETHANE), COMPRENANT UN AGENT VISCOSIFIANT

摘要

The invention relates to a method for selectively eliminating the hydrogen sulfide H2S from a gaseous effluent comprising at least H2S and CO2, wherein a step of selectively absorbing the hydrogen sulfide as opposed to the CO2 is performed by bringing said effluent into contact with a solution comprising (a) water and (b) at least the following diamine: l,2-bis-(2-dimethylaminoethoxy)-ethane, and wherein the selectivity of the absorption is controlled by adding (c) a viscosifying compound to the absorbent solution.