Patent ID: 8470079

Claim:
Process for removing CO 2 from a gas mixture or gas stream, comprising the steps a) contacting the gas mixture or the gas stream with at least one CO 2 -absorbing agent which, if appropriate, can be present in aqueous solution or suspension, the at least one CO 2 -absorbing agent comprising at least one primary amine, at least one secondary amine, and at least one tertiary amine, wherein said primary amine is selected from the group consisting of pentylamine, hexylamine, heptylamine, octylamine, cyclohexylamine, 2-methylcyclohexylamine, 2-methylbutylamine, 2-aminopentane, 2-aminoheptane, 2-aminohexane, 2-aminooctane, 2-aminononane, 3-methoxypropylamine, 2-methyl-1,5-diaminopentane, geranylamine, 2-ethyl-l-hexylamine, 6-methyl-2-heptylamine, cyclooctylamine, aniline, N-phenylethylenediamine, 2-phenylethylamine, N,N-dimethyl-4-cyclooctene-1-amines, and a mixture thereof; b) partially removing the at least one CO 2 -absorbing agent and inducing a phase separation into an aqueous phase and also a nonaqueous phase, wherein the at least one CO 2 -absorbing agent, after the phase separation, resides at least predominantly in the nonaqueous phase; and also c) predominantly transferring the CO 2 to the aqueous phase, wherein step c) can proceed in part or completely simultaneously with step b).