公开(公告)号：SK6962000A3

公开(公告)日：2000-11-07

申请号：SK6962000

申请日：1998-11-24

Applicant: BASF AG

Inventor： HUENGER HANS-HARALD ,  LUDWIG ALFONS ,  NEUBERG RAINER ,  PIPPER GUNTER ,  SAUTER THOMAS ,  WILMS AXEL

IPC: C08G69/14 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.