METHOD FOR SELECTIVELY ABSORBING HYDROGEN SULPHIDE FROM A GASEOUS EFFLUENT BY MEANS OF AN ABSORBING SOLUTION ON THE BASIS OF 1,2-BIS (DIMETHYLAMINOETHOXYETHANE) COMPRISING A VISCOSITY ENHANCER

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.