This invention relates to a process for the coproduction of propanediamines and alkylated aminopropanediamines. The process contemplates an initial cyanoethylation of ammonia under conditions for producing aminopropionitrile and modest levels of iminobispropionitrile. After separation of the iminobispropionitrile from the aminopropionitrile, the process involves the catalytic reductive alkylation of the iminobispropionitrile by reaction with an aldehyde in the presence of hydrogen to form the alkylated iminobispropionitrile followed by the catalytic hydrogenation of the nitrile group in aminopropionnitrile and iminobispropionitrile to the amine.
本发明涉及一种共同生产
丙二胺和烷基化
氨基
丙二胺的工艺。该工艺考虑在生产
氨基
丙腈和适量亚
氨基双
丙腈的条件下对
氨进行初始
氰乙基化。亚
氨基双
丙腈与
氨基
丙腈分离后,该工艺包括亚
氨基双
丙腈与醛在氢存在下发生催化还原烷基化反应,生成烷基化亚
氨基双
丙腈,然后将
氨基
丙腈和亚
氨基双
丙腈中的腈基催化氢化为胺。