A process for the selective separation of hydrogen sulfide from gas mixtures containing carbon dioxide as well as other acidic gases uses severely sterically hindered amino alcohol absorbents based on amino alcohols and ethers containing secondary nitrogen atoms hindered by an alpha tertiary carbon atom. Preferred absorbents include 2-(N-methylamino)-2-methylpropan-1-ol, (2-(N-ethylamino))-2-methylpropan-1-ol, (2-(N-isopropylamino)-2-methylpropan-1-ol, SBAE (2-(N-sec-butylamino)-2-methylpropan-1-ol) and (2-(N-t-butylamino)-2-methylpropan-1-ol.
一种用于从含有
二氧化碳以及其他酸性气体的气体混合物中选择性分离
硫化氢的工艺,使用基于
氨基醇和醚的高度立体位阻的
氨基醇吸收剂,其中含有由α-三级碳原子阻碍的二级氮原子。首选吸收剂包括2-(N-甲基
氨基)-2-甲基
丙醇,2-(N-乙基
氨基)-2-甲基
丙醇,2-(N-异丙基
氨基)-2-甲基
丙醇,SBAE(2-(N-仲丁基
氨基)-2-甲基
丙醇)和2-(N-叔丁基
氨基)-2-甲基
丙醇。