The present invention relates to an aqueous alkanolamine solution for the removal of hydrogen sulfide from gaseous mixtures. The aqueous alkanolamine solution comprises (i) an amino compound with the formula: R
1
R
2
NCH
2
CH(OH)CH
2
OH wherein R
1
and R
2
independently represent lower alkyl groups of 1 to 3 carbon atoms and (ii) an acid or acid-forming material having a pKa equal to or less than 8, optionally (iii) another amino compound, and optionally (iv) a physical solvent. Further, the present invention relates to a process for removing acid gases from a gaseous mixture, preferably hydrogen sulfide, comprising the step of contacting the gaseous mixture with the aqueous alkanolamine solution, preferably wherein the temperature of the aqueous alkanolamine solution is equal to or greater than 140° F. Examples of the gaseous mixtures include natural gas, synthesis gas, tail gas, and refinery gas.
本发明涉及一种用于从气体混合物中去除
硫化氢的
水性烷基醇胺溶液。所述
水性烷基醇胺溶液包括(i)一种具有以下式子的
氨基化合物:R1R2NCH2CH(OH)CH2OH,其中R1和R2独立地代表1至3个碳原子的低级烷基基团,以及(ii)具有pKa等于或小于8的酸或酸形成物,可选地(iii)另一种
氨基化合物,和可选地(iv)一种物理溶剂。此外,本发明涉及一种从气体混合物中去除酸性气体,优选是
硫化氢的工艺,包括将气体混合物与
水性烷基醇胺溶液接触的步骤,优选是其中
水性烷基醇胺溶液的温度等于或大于140°F。气体混合物的例子包括天然气、合成气、尾气和炼油气。