公开(公告)号：US3657195A

公开(公告)日：1972-04-18

申请号：US3657195D

申请日：1969-02-19

Applicant: BASF AG

Inventor： DOERFEL HELMUT ,  ZETTLER HANS DIETER

IPC: C08G69/00 ,  B01J14/00 ,  B29C47/76 ,  C08F2/00 ,  C08G69/04 ,  C08G69/28 ,  C08G20/38

CPC classification number: B29C47/767 ,  B29C47/0009 ,  C08G69/28

Abstract: A PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT NYLON 6,6 BY CONTINUOUS FURTHER CONDENSATION OF LOW MOLECULAR WEIGHT NYLON 6,6 IN A SELF-CLEANING SCREW EXTRUDER REACTOR PROVIDED WITH AT LEAST ONE DEGASSING ORIFICE AT ELEVATED TEMPERATURE AND A PRESSURE OF FROM 50 MM. HG TO 2 ATMOSPHERES GAUGE AND WHILE SUPPLYING THROUGH THE SCREWS AN AMOUNT OF ENERGY OF FROM 0.02 TO 0.2 KILOWATT HOURS PER KILOGRAM OF POLYAMIDE.