公开(公告)号：US3634371A

公开(公告)日：1972-01-11

申请号：US3634371D

申请日：1969-07-18

Applicant: BASF AG

Inventor： POHLEMANN HEINZ ,  ROEMER FRITHJOF ,  SWOBODA JOHANN

IPC: C08F2/04 ,  C08F4/30 ,  C08F4/32 ,  C08F3/76 ,  C08F15/22

CPC classification number: C08F4/32

Abstract: POLYMERIZATION OF OLEFINICALLY UNSATURATED ORGANIC COMPOUNDS, PARTICULARLY MIXTURES OF MONOMERS CONTAINING AT LEAST 80% BY WEIGHT OF ACRYLONITRILE, IN AN ORGANIC SOLVENT WITH A SALT OF PEROXYDISULFURIC ACID WHICH IS SOLUBLE IN THE SAID SOLVENT. PALE TO COLORLESS AND CLEAR POLYMERS ARE OBTAINED.

公开(公告)号：US3634300A

公开(公告)日：1972-01-11

申请号：US3634300D

申请日：1970-11-04

Applicant: BASF AG

Inventor： FISCHER HERMANN ,  HEIL EDUARD ,  SWOBODA JOHANN ,  THOMA RICHARD

IPC: C08F6/10 ,  C08F47/22

CPC classification number: C08F6/10

Abstract: A CONTINOUS PROCESS FOR THE REMOVAL OF RESIDUAL MONOMERS FROM SOLUTION OF ACRYLONITRILE POLYMERS IN DIMETHYLFORMAMIDE AND FOR CONCENTRATING THE SOLUTIONS IN A SEQUENCE OF SEPARATING ZONES PRESSURE RELEASE ZONES, HEATING ZONES AND PRESSURE RELEASE ZONES. THE PROCESS IS DISTINGUISHED BY SHORT RESIDENCE TIMES AND ONLY SLIGHT DAMAGE TO THE POLYMER SOLUTIONS. THE SOLUTIONS OBTAINED MAY SERVE FOR THE PRODUCTION OF FILAMENTS, THREADS OR FIBERS.