CO AND/OR HS ABSORBENT AND APPARATUS AND METHOD FOR EXTRACTING CO AND/OR HS Russian patent published in 2022 - IPC B01D53/14 B01D53/52 B01D53/62 

FIELD: chemical processes.

SUBSTANCE: invention relates to an absorbent for absorbing carbon dioxide (CO₂), or hydrogen sulphide (H₂S), or for absorbing both CO₂ and H₂S, and to an apparatus and method for extracting CO₂, or H₂S, or both CO₂ and H₂S. Described is an absorbent for absorbing CO₂, or H₂S, or both CO₂ and H₂S in a gas, containing, as components: (a) secondary linear monoamine; (b) tertiary linear monoamine, and (c) secondary cyclic diamine; wherein the concentration of secondary linear monoamine (a) is over 30 wt.% and below 45 wt.%, the concentration of tertiary linear monoamine (b) is over 15 wt.% and below 30 wt.%, and the secondary linear monoamine (a) includes a compound selected from at least one of N-methylaminoethanol, N-ethylaminoethanol, N-propylaminoethanol, N-butylaminoethanol; the tertiary linear monoamine (b) includes a compound selected from at least one of N-methyldiethanolamine, N-ethyldiethanolamine, N-butyldiethanolamine, 4-dimethylamino-1-butanol, 2-dimethylaminoethanol, 2-diethylaminoethanol, 2-di-n-butylaminoethanol, N-ethyl-N-methylethanolamine, 3-dimethylamino-1-propanol, 2-dimethylamino-2-methyl-1-propanol, and the secondary cyclic diamine (c) constitutes a piperazine derivative including piperazine (C₄H₁₀N₂), 2-methylpiperazine (C₅H₁₂N₂), and 2,5-dimethylpiperazine (C₆H₁₄N₂), or a mixture thereof.

EFFECT: provided absorbent of CO₂, and/or H₂S, or both CO₂ and H₂S, capable of reducing the heat load on the reboiler in the process of recirculation of the absorbent; and provided method and apparatus for extracting CO₂, or H₂S, or both CO₂ and H₂S.

8 cl, 12 tbl, 7 dwg