FIELD: absorbents. SUBSTANCE: liquid has one or several tertiary alkanolamines and activator of absorption CO2. Activator consists of at least one aminated compound taken among polyalkylenepolyamines, alkylenediamines or cycloalkylenediamines, aminoalkylated heterocyclic compounds, for example, piperazine, furan, thiophene, tetrahydrofuran and tetrahydrothiophene, alkoxyalkylamine and alkylmonoalkanolamines with alkyl as a residue at least CO2. Indicated absorbing liquid is used for gas deoxidation containing C2 and, in known cases, other acid gaseous compounds, in part, CO2 and H2S и CO2. EFFECT: enhanced effectiveness of absorbent. 13 cl, 6 tbl
