公开(公告)号：MY119018A

公开(公告)日：2005-03-31

申请号：MYPI9704011

申请日：1997-08-29

Applicant: BASF AG

Inventor： WOLFGANG HARDER ,  DIETER KELLER ,  DIETER KRAUSS ,  ALFONS LUDWIG ,  RALF MOHRSCHLADT ,  GUNTER PIPPER ,  ROBERT WEISS

IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/28 ,  C08G69/36

Abstract: A PROCESS FOR PREPARING A POLYAMIDE BY REACTING AT LEAST ONE AMINONITRILE WITH WATER WHICH COMPRISES THE FOLLOWING STEPS:(1)REACTING AT LEAST ONE AMINONITRILE WITH WATER AT A TEMPERATURE FROM 100 TO 360°C AND A PRESSURE FROM 0.1 TO 35 x 106 PA TO OBTAIN A REACTION MIXTURE,(2)FURTHER REACTING THE REACTION MIXTURE AT A TEMPERATURE FROM150 TO 400°C AND A PRESSURE WHICH IS LOWER THAN THE PRESSUREIN STEP 1, THE TEMPERATURE AND THE PRESSURE BEING SELECTED SO AS TO OBTAIN A FIRST GAS PHASE AND A FIRST LIQUID OR A FIRST SOLID PHASE OR A MIXTURE OF FIRST SOLID AND FIRST LIQUID PHASE, AND SEPARATING THE FIRST GAS PHASE FROM THE FIRST LIQUID OR THE FIRST SOLID PHASE OR FROM THE MIXTURE OF FIRST LIQUID AND FIRST SOLID PHASE, AND(3)ADMIXING THE FIRST LIQUID OR THE FIRST SOLID PHASE OR THE MIXTURE OF FIRST LIQUID AND FIRST SOLID PHASE WITH A GASEOUS OR LIQUID PHASE COMPRISING WATER AT A TEMPERATURE FROM 150 TO 360°C AND A PRESSURE FROM 0.1 TO 30 x 106 PA TO OBTAIN A PRODUCT MIXTURE, AS WELL AS FURTHER EMBODIMENTS OF SAID PROCESS AND THE ACCORDINGLY PREPARED POLYAMIDES AS SUCH.