The selective removal of H.sub.2 S gas from a normally gaseous mixture containing H.sub.2 S and CO.sub.2 is accomplished by contacting the gaseous mixture with an absorbent solution comprising a nitrogen heterocyclic tertiary aminoalkanol or aminoetheralkanol whereby H.sub.2 S is selectively absorbed from the mixture.
从含有H.sub.2 S和CO.sub.2的常规气态混合物中选择性地去除H.sub.2 S气体是通过将气态混合物与吸收剂溶液接触来实现的,所述吸收剂溶液包括一种氮杂环三级
氨基烷醇或
氨基醚烷醇,从而选择性地吸收混合物中的H.sub.2 S。