公开(公告)号：US3639659A

公开(公告)日：1972-02-01

申请号：US3639659D

申请日：1969-03-28

Applicant: BASF AG

Inventor： NIESWANDT WERNER ,  LINGE HERMANN ,  PIRZER HANS ,  HOERAUF WERNER ,  HETZ HERBERT

IPC: C08G69/46 ,  C08G20/38

CPC classification number: C08G69/46

Abstract: PROCESS FOR THE CONTINUOUS EXTRACTION OF LOW MOLECULAR WEIGHT CONSTITUENTS FROM GRANULAR POLYAMIDES IN AN EXTRACTION ZONE IN WHOSE UPPER PART THE EXTRACTANT IS RECYCLED.

公开(公告)号：US3905946A

公开(公告)日：1975-09-16

申请号：US39224473

申请日：1973-08-28

Applicant: BASF AG

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

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

CPC classification number: 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.

Abstract translation: 连续提取多内酰胺颗粒以通过在提取区域中逆流流动的热水从其中除去单体和/或低聚物，该提取区通过至少一个加热区被分成次区域，并以特定的时间间隔加速水 与流动的流动并流逆流。