Absorbing liquid for eliminating sulfide from gas mixture
A technology for gas mixtures and absorbing liquids, which is used in the preparation/purification of sulfur, chemical instruments and methods, separation methods, etc.
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Embodiment 2
[0016] Composition of absorption liquid: main absorbent hindered amine (I) 25%, MDEA (II) 15%, cosolvent (III) formyl morpholine, etc. 5%, catalyst (IV) monoethanolamine, etc. 3%, raw material gas composition: N 2 72.1%, CO 2 23.3%, H 2 S 3.6%, sulfide 538mg / m 3 . At 40°C monoethanolamine is absorbed under normal pressure, and the removal rate of sulfide is 76.8%. Implementation example three:
Embodiment 3
[0017] The composition of the absorption liquid: 15% of the main absorbent hindered amine (I), 40% of MDEA (II), 5% of the cosolvent (III) N-methylpyrrolidone, etc., 3% of the catalyst (IV) piperazine, etc., and the raw material gas is Semi-water gas (N 2 21.8%, CO 2 8.0%, CO 28.5%, H 2 40.0%, O 2 0.4%, CH 4 1.3%, COS 136mg / m 3 ), 0.5MPa absorption, tower top temperature 40°C, COS removal rate: 95.2%. Implementation example four:
Embodiment 4
[0018] The absorption liquid is: main absorbent hindered amine (I) 5%, MDEA (II) 15%, cosolvent (III) sulfolane 10%, catalyst (IV) diethanolamine, etc. 5%, raw material gas adopts shift gas (N 2 16.98%, CO 2 28.43%, CO 1.20%, H 2 52.38%, CH 4 1.01%), mixed with mercaptan 2132mg / m 3 , 0.5MPa absorption, tower top temperature 40°C, mercaptan removal rate: 71.2%.
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