Method for preparing 1, 4-butanediamine with high selectivity

The invention provides a method for preparing 1, 4-butanediamine with high selectivity, which comprises the following steps: dissolving butanedinitrile in a solvent, under the action of a catalyst, adding an auxiliary agent, introducing hydrogen, and reacting at a certain temperature and pressure to obtain 1, 4-butanediamine, the catalyst is a metal-doped Raney cobalt catalyst. According to the method disclosed by the invention, a double-strand parallel-flow feeding mode of the butanedinitrile and the liquid ammonia is adopted, so that the generation of a by-product tetrahydropyrrole is effectively inhibited on the premise of ensuring the high conversion rate of the butanedinitrile, and the 1, 4-butanediamine is prepared at high selectivity. 本发明提供了一种高选择性制备1,4-丁二胺的方法，包括如下步骤：丁二腈溶于溶剂中，在催化剂的作用下，加入助剂后和通入氢气后，在一定温度和压力下进行反应，得到1,4-丁二胺；催化剂为掺杂金属的雷尼钴催化剂。本发明采用丁二腈与液氨双股并流的进料方式，在保证丁二腈高转化率的前提下有效抑制了副产物四氢吡咯的生成，从而高选择性地制备得到1,4-丁二胺。