公开(公告)号：US3732275A

公开(公告)日：1973-05-08

申请号：US3732275D

申请日：1970-12-30

Applicant: BASF AG

Inventor： PLATZ R ,  DECKER M ,  BUERGER G ,  STECHL H

IPC: C07C255/51 ,  C07C121/56

CPC classification number: C07C255/00

Abstract: AN IMPROVED PROCESS FOR THE RECOVERY OF PHTHALONITRILES FROM HOT REACTION GASES CONTAINING THE SAME BY CONTACTING THE HOT REACTION GASES WITH A COOLANT WHICH IS AT A TEMPERATURE OF FROM 40* TO 200*C. AND COOLING THEM DOWN AT A RATE OF MORE THAN 350*C. PER SECONDS, THE COOLANT BEING WATER, BENZONITRILE OR O-TOLUNITRILE WHICH FROM RRECYCLING CONTAINS 2 TO 40% PHTHALONITRILES. O-PHTHALONITRILE IS SUITABLE FOR THE PRODUCTION OF PHTHALOCYANINES WHICH ARE VALUABLE PIGMENTS, TEREPHTHALONITRILE AND ISOPHTHALONITRILES CAN BE REDUCED TO THE CORRESPONDING DIAMINES WHICH ARE STARTING MATERIALS FOR THE MANUFACTURE OF POLYAMIDES WHICH CAN BE USED FOR THE PRODUCTION OF FIBERS.