公开(公告)号：PT1575905E

公开(公告)日：2009-09-30

申请号：PT03789263

申请日：2003-12-13

Applicant: BASF SE

Inventor： PENZEL ULRICH ,  MARTIN SOHN DR ,  MACKENROTH WOLFGANG ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PALLASCH HANS-JUERGEN ,  SCHWARZ HANS VOLKMAR ,  SANDER MICHAEL

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/14

公开(公告)号：AT442350T

公开(公告)日：2009-09-15

申请号：AT03789263

申请日：2003-12-13

Applicant: BASF SE

Inventor： SOHN MARTIN ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PENZEL ULRICH ,  PALLASCH HANS-JURGEN ,  SANDER MICHAEL ,  SCHWARZ HANS ,  MACKENROTH WOLFGANG

IPC: C07C263/10 ,  C07C263/20 ,  C07C265/14

Abstract: The present invention relates to a process for preparing isocyanates by reaction of amines with phosgene in a reactor and subsequent separation of the isocyanate from the reaction mixture leaving the reactor and purification of the isocyanate, wherein the separation and purification of the isocyanate is carried out in a column having a pressure at the top of 1-950 mbar, preferably 5-50 mbar, particularly preferably 10-20 mbar, and a temperature at the bottom of 90-250° C., preferably 120-170° C., particularly preferably 130-150° C., and the pure isocyanate stream is preferably taken off in liquid or gaseous form at a side offtake of the column.