Process for the asborption of co2 from a gas mixture with an absorption medium comprising amines

Abstract

An absorption medium comprising water and at least one amine of formula (I) where R2 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 and R4 may combine to form the bridging radical —(CH2)n—, —CH2CH2OCH2CH2— or —CH2CH2NR7CH2CH2— with n=2 to 5 and R2=hydrogen or an alkyl radical having 1 to 6 carbon atoms, brings about an improved CO2 absorption capacity in the absorption of CO2 from a gas mixture by contacting the gas mixture with the absorption medium.

Dependencies are inferred from the claim text.