公开(公告)号：US3565866A

公开(公告)日：1971-02-23

申请号：US3565866D

申请日：1968-11-05

Applicant: BASF AG

Inventor： GUENTHER ERNST ,  LINGE HERMANN ,  NOE KURT ,  PIRZER HANS

IPC: B01J19/00 ,  B01J19/18 ,  C08G69/16 ,  C08G20/14

CPC classification number: C08G69/16 ,  B01J19/0013 ,  B01J19/18 ,  B01J2219/00078 ,  B01J2219/00083 ,  B01J2219/00094 ,  B01J2219/185

Abstract: AN IMPROVED PROCESS FOR THE CONTINUOUS POLYMERIZATION OF LACTAMS HAVING 5 TO 13 RING MEMBERS IN A POLYMERIZATION TUBE IN WHICH PROCESS THE LACTAMS ARE PREPOLYMERIZED IN THE FIRST ZONE OF A MODIFIED POLYMERIZATION TUBE WITH VIGOROUS STIRRING UP TO A CONVERSION OF MORE THAN 50%, FURTHER POLYMERIZED IN THE SECOND AND THIRD ZONES AT NEARLY LAMINAR FLOW AND AFTER-POLYMERIZED IN THE FOURTH ZONE AT A TEMPERATURE SLIGHTLY ABOVE THE MELTING POINT OF THE RESULTANT POLYMER.

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.