公开(公告)号：US3563980A

公开(公告)日：1971-02-16

申请号：US3563980D

申请日：1968-04-05

Applicant: STAMICARBON

Inventor： MOURIK JOHANNES VAN ,  BEVEREN JOHANNES VAN ,  DILVA JOHANNES J DE

IPC: B01J19/18 ,  C07D201/14 ,  C08G69/18 ,  C07D41/08

CPC classification number: C08G69/18 ,  B01J19/1862 ,  B01J2219/0009 ,  B01J2219/00094 ,  B01J2219/00108 ,  B01J2219/00182 ,  C07D201/14

Abstract: PROCESS AND APPARTUS FOR PREPARING A CATALYST FOR THE ANIONIC POLYMERIZATION OF LACTAMS, IN WHICH A LACTAM AND A ALKALI METAL HYDROXIDE ARE CONTINOUSLY FED INTO A FIRST REACTION VESSEL THE LIQUID LEVEL IN SAID VESSEL BEING KEPT CONSTANT BY FEEDING A PORTION OF THE REACTION MIXTURE INTO A SECOND VESSEL AND THE LIQUID LEVEL IN SAID SECOND VESSEL BEING KEPT CONSTANT BY DISCHARGINGG A CONTINUOUS STREAM OF THE REACTION MIXTURE FROM SAID VESSEL. THE WATER FORMED IN THE REACTION VESSELS IS EVAPORATED BY HEATING IN VACUO AND THE VAPOUR THUS FORMED IS PASSED THROUGH A CONDENSER IN WHICH THE LACTAM IS CONDENSED AND RETURNED TO THE REACTION VESSELS.