An absorbent for the selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide, wherein the absorbent contains an aqueous solution, comprising: a) an amine or a mixture of amines of the general formula (I) wherein R1 is C1-C5-alkyl; R2 is C1-C5-alkyl; R3 is selected from hydrogen and C1-C5-alkyl; x is an integer from 2 to 10; and b) an ether or a mixture of ethers of the general formula (II): R4—[O—CH2—CH2]y—OH; wherein R4 is C1-C5-alkyl; and y is an integer from 2 to 10; wherein R1 and R4 are identical; wherein the mass ratio of b) to a) is from 0.08 to 0.5. The absorbent is suitable for the selective removal of hydrogen sulfide from a fluid stream comprising carbon dioxide and hydrogen sulfide. The absorbent has a reduced tendency for phase separation at temperatures falling within the usual range of regeneration temperatures for the aqueous amine mixtures and is easily obtainable.
一种从包含
二氧化碳和
硫化氢的流体中选择性去除
硫化氢的吸收剂,其中吸收剂含有
水溶液,包含:a)通式(I)的胺或胺的混合物,其中R1是C1-C5-烷基;R2是C1-C5-烷基;R3选自氢和C1-C5-烷基;x是2至10的整数;和b)通式(II)的醚或醚的混合物:R4-[O-
CH2- ]y-OH;其中 R4 为 C1-C5 烷基;y 为 2 至 10 的整数;其中 R1 和 R4 相同;其中 b) 与 a) 的质量比为 0.08 至 0.5。该吸收剂适用于从包含
二氧化碳和
硫化氢的流体中选择性地去除
硫化氢。该吸收剂在
水胺混合物通常的再生温度范围内具有较低的相分离倾向,并且易于获得。