Process for preparing an amine by reacting an aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of primary and secondary amines in the presence of a heterogeneous catalyst, wherein the reaction is carried out using a suspended catalyst as heterogeneous catalyst and is carried out in the semibatch mode in which the nitrogen compound as one reactant is placed in the reaction vessel and the aldehyde and/or the ketone as the other reactant is added during the course of the reaction and the aldehyde and/or the ketone is added in portions or continuously to the reaction mixture during the course of the reaction as a function of the achieved conversion of the nitrogen compound until a conversion of the nitrogen compound of at least 95% results, and all or part of the catalyst remains in the reaction vessel after the reaction batch and is reused for the next reaction batch.
通过在存在异质催化剂的情况下,将醛和/或酮与
氢气和从一次和二次胺组成的氮化合物中选择的氮化合物反应,从而制备胺的过程。在这个过程中,使用悬浮催化剂作为异质催化剂进行反应,并以半批次模式进行反应。在这种模式下,氮化合物作为一个反应物被放入反应容器中,而醛和/或酮作为另一个反应物在反应过程中被逐渐添加。醛和/或酮在反应过程中分批或连续地添加到反应混合物中,以根据氮化合物的转化率进行调整,直到氮化合物的转化率达到至少95%。在反应批次结束后,所有或部分催化剂仍留在反应容器中,并用于下一个反应批次。