PROCESS FOR ABSORBING CO2 FROM A GAS MIXTURE

摘要

An absorption medium comprising water and at least one amine of the formula (I) in which R1 is hydrogen or an alkyl radical having 1 to 4 carbon atoms, R2 is an alkyl radical having 1 to 4 carbon atoms, R3 and R5 are each independently alkyl radicals having 1 to 6 carbon atoms and R4 and R6 are each independently hydrogen or alkyl radicals having 1 to 6 carbon atoms, where R3, R4 together may be a bridging -(CH2)n-, -CH2CH2OCH2CH2- or -CH2CH2NR7CH2CH2- radical where n = 2 to 5 and R7 = hydrogen or alkyl radical having 1 to 6 carbon atoms, brings about an improved capacity for the absorption of CO2 in the absorption of CO2 from a gas mixture by contacting the gas mixture with the absorption medium.