公开(公告)号：HU0100943A2

公开(公告)日：2001-06-28

申请号：HU0100943

申请日：1999-02-22

Applicant: BASF AG

Inventor： DR FUCHS EBERHARD ,  HILDEBRANDT VOLKER ,  MOHRSCHLADT RALF ,  PIPPER GUNTER

IPC: C08G69/18 ,  C08G69/20

Abstract: In a process for producing polyamides by polymerization of lactams in the presence of metal oxides as heterogeneous catalysts, the metal oxides are used in a form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of or on completion of the polymerization.

公开(公告)号：HU220970B1

公开(公告)日：2002-07-29

申请号：HU9603620

申请日：1995-06-16

Applicant: BASF AG

Inventor： DR FUCHS EBERHARD ,  DR WITZEL TOM

IPC: C07D201/08

Abstract: Cyclic lactams are prepared by reacting an aminocarboxylic acid compound of the formula I H2N-(CH2)m-COR1 I where R1 is -OH, -O-C1-C12-alkyl or -NR2R3 and R2 and R3, independently of one another, are each hydrogen, C1-C12-alkyl or C5-C8-cycloalkyl and m is an integer from 3 to 12, with water by a process in which the reaction is carried out in the liquid phase using a heterogeneous catalyst.