Patent ID: 7387768

Claim:
A method for purifying a gas comprising gaseous acidic contaminants, said method comprising contacting the gas with an absorption liquid comprising: A) 0.1 to 100% by weight of one or more amines of the formula 1 where R 1 is H, C 1 -C 6 -alkyl, an aromatic radical having 6 to 18 carbon atoms or a radical of the formula 2 R 2 is H, C 1 -C 6 -alkyl, an aromatic radical having 6 to 18 carbon atoms or a radical of the formula 3 R 3 is C 1 -C 6 -alkyl or an aromatic radical having 6 to 18 carbon atoms R 4 is H or CH 3 R 5 is H or CH 3 x is a number from 0 to 3 y is a number from 0 to 3 z is an integer between 1 and 30, and from 0 to 99.9% by weight of (B) water or from 0 to 99.9% by weight a solvent (C) or mixtures thereof.