This invention relates to a process for the separation of acrylonitrile used in the cyanoethylation of glycols to produce a bis(cyanoethylated) aliphatic glycol from the resulting glycol which is then reduced with hydrogen to produce the corresponding bis(aminopropyl) aliphatic glycol. In this process, acrylonitrile is reacted with an aliphatic glycol in stoichiometric excess and the acrylonitrile removed from the cyanoethylated glycol by reaction with aliphatic primary or secondary amine prior to effecting the hydrogenation of the cyanoethylated aliphatic glycol in the presence of the acrylonitrile-amine reaction product. The reaction product then can be separated by conventional techniques such as distillation.
本发明涉及一种用于分离
丙烯腈的工艺,该
丙烯腈用于
氰基乙基化二元醇以产生双(
氰基乙基化)脂肪族二元醇,然后用氢还原产生相应的双(
氨基丙基)脂肪族二元醇。在该工艺中,
丙烯腈与脂肪族二元醇以
化学计量比过量反应,然后通过与脂肪族初级或次级胺反应除去
氰基乙基化的二元醇中的
丙烯腈,再在
丙烯腈-胺反应产物的存在下进行
氰基乙基化的脂肪族二元醇的氢化。然后,反应产物可以通过常规技术,如蒸馏,进行分离。