公开(公告)号：CA1012679A

公开(公告)日：1977-06-21

申请号：CA179854

申请日：1973-08-28

Applicant: BASF AG

Inventor： NIESWANDT WERNER ,  HOERAUF WERNER ,  GUENTHER ERNST ,  KISSEL ERNST ,  NEUMANN ECKART ,  VALENTIN GUENTHER

IPC: C08G69/00 ,  B01D11/02 ,  C07D201/12 ,  C08G69/46

Abstract: Continuous extraction of polylactam granules for the removal of monomers and/or oligomers therefrom by means of hot water flowing countercurrently in an extraction zone, which extraction zone is divided into subzones by at least one heating zone and the water is accelerated, at certain time intervals, cocurrently and countercurrently to the flow of granules.