公开(公告)号：EP3512830A1

公开(公告)日：2019-07-24

申请号：EP17758874.6

申请日：2017-08-31

Applicant: BASF SE

Inventor： WEICKGENANNT, Andreas ,  TAURO, Silvia ,  DUEFERT, Alexander ,  LADNAK, Viktor ,  THIELE, Kai

IPC: C07C209/82 ,  C07C209/84 ,  C07C209/90

公开(公告)号：EP3405451B1

公开(公告)日：2020-01-01

申请号：EP17701642.5

申请日：2017-01-12

Applicant: BASF SE

Inventor： LADNAK, Viktor ,  TAURO, Silvia ,  HEINEN, Kerstin ,  THIELE, Kai ,  METZNER, Klaus-Peter ,  MATTKE, Torsten

IPC: C07C209/78 ,  C07C211/50

公开(公告)号：EP3405451A1

公开(公告)日：2018-11-28

申请号：EP17701642.5

申请日：2017-01-12

Applicant: BASF SE

Inventor： LADNAK, Viktor ,  TAURO, Silvia ,  HEINEN, Kerstin ,  THIELE, Kai ,  METZNER, Klaus-Peter ,  MATTKE, Torsten

IPC: C07C209/78 ,  C07C211/50

Abstract: The invention relates to a method for producing an aromatic polyamine mixture that contains 4,4'-methylene diphenyl amine and higher homologues of MDA, by (i) reacting aniline with formaldehyde using an acid catalyst to form a raw-product mixture (I), (ii) neutralising the raw-product mixture (I) and separating the resulting salts; (iii) separating aniline; (iv) distilling the obtained raw-product mixture by separating (iv-1) a mixture (II) consisting of MDA isomers (II-1) having 8 to 20 wt.% 4,4'-methylene diphenyl amine and a maximum of 0.3 wt.% of secondary components (II-2), and (iv-2) a low boiling mixture consisting of at least 55 wt.% secondary components (II-2) and MDA isomers (II-1); and (v) recirculating the mixture (II).