公开(公告)号：US20240279155A1

公开(公告)日：2024-08-22

申请号：US18564719

申请日：2022-05-23

Applicant: BASF SE

Inventor： Martin SCHLODERER ,  Alfred KRAUSE ,  Andreas Edgar HERRMANN ,  Hannes Ferdinand GOUVERNEUR

IPC: C07C209/48 ,  C07C209/86

CPC classification number: C07C209/48 ,  C07C209/86

Abstract: The invention relates to a method for the production of IPDA comprising the steps of: V. converting IPN with ammonia and hydrogen to IPDA, VI. removing hydrogen and/or ammonia from the effluent from step I VII. separating the effluent from step II in one or more steps into (v) a fraction comprising an organic phase having a boiling point lower than IPDA (vi) a fraction comprising an aqueous phase having a boing point lower than IPDA; (vii) a fraction comprising IPDA (viii) a fraction comprising components having a boiling point higher than IPDA; and VIII. subjecting the fraction (ii) to one or more waste-water pretreatment steps, se-lected from the group consisting of evaporation, oxidation and adsorption.