REMOVING CO2 FROM GASES WITH A LOW PARTIAL PRESSURE OF CO2 BY USING 1, 2-DIAMINOPROPANE

摘要

1. The use of an absorbent to remove acid gases from a liquid stream, wherein the absorbent contains an aqueous solution of 1,2-diaminopropane. 2. The use of the absorbent according to claim 1, wherein the absorbent contains 10-90% (wt.), Preferably 30-65% (wt.) Of 1,2-diaminopropane with respect to the weight of the absorbent. The use of an absorbent according to claims 1 or 2, wherein the absorbent contains at least one more amine, different from 1,2-diaminopropane. The use of an absorbent according to claim 3, wherein the absorbent contains 5-45% (wt.) And preferably 10-40% (wt.) Of at least one amine other than 1,2-diaminopropane. The use of the absorbent according to claim 3, where at least one other amine other than 1,2-diaminopropane is selected from: A) tertiary amines of the general formula: N (R1) (R2), in which R1 represents an alkyl group, R2 - a hydroxyalkyl group or tertiary amines of the general formula: (R1) (R2) NXN (R1) (R2) in which R1 is an alkyl group, R2 is a hydroxyalkyl group, X is an alkylene group that is interrupted by oxygen one or more times, and n and m - an integer from 0 to 2, or two residues R1 and R2 are linked to different nitrogen atoms and together represent al kylen group, B) space-hindered amines, C) 5, 6, or 7-membered saturated heterocyclic compounds with at least one NH group in the ring, which may also have one or two heteroatoms in the ring selected from nitrogen and oxygen, D) primary or secondary alkanolamines, E) alkylenediamines of the formula: HN-R2-NH wherein R2 is a C-C1-6 alkyl group. The use of the absorbent according to claim 5, wherein the tertiary amine is selected from the group consisting of bis-dimethylaminoethyl ether, tris (2-hydroxyethyl)