公开(公告)号：EP1497259B1

公开(公告)日：2007-08-01

申请号：EP03724984.4

申请日：2003-04-09

申请人： BASF Aktiengesellschaft

发明人： STAROSTA, Dieter ,  PFAB, Peter ,  KRASE, Volker ,  SCHMIDT, Andeas ,  KLÖTZER, Matthias ,  OTTERBACH, Andreas

IPC分类号： C07C263/04 ,  B01J6/00

CPC分类号： F28D9/00 ,  B01J10/00 ,  B01J19/0013 ,  B01J2219/00085 ,  C07C263/04 ,  C07C265/00

摘要： Disclosed is a rector for thermally cracking monofunctional and/or polyfunctional carbamates into the corresponding isocyanate and hydroxyl components in the liquid phase, comprising devices which feed heat into the reactor. Said devices are embodied as heat exchange plates that are flooded with a heat-exchanging means. The geometry of the devices, which is characterized by the fact that the outgassing surface is proportional to the volume as well as by the arrangement of the heating surfaces, allows the cracking to take place in a two-phase mixture containing more than 50 percent by volume of gas.

公开(公告)号：EP1073628B1

公开(公告)日：2003-10-01

申请号：EP99920644.4

申请日：1999-04-12

申请人： BASF AKTIENGESELLSCHAFT

发明人： PENZEL, Ulrich ,  SCHARR, Volker ,  STAROSTA, Dieter ,  BOESEL, Hilmar ,  STRÖFER, Eckhard ,  PFEFFINGER, Joachim ,  POPLOW, Frank ,  DOSCH, Jürgen ,  SCHWARZ, Hans, Volkmar ,  NÄUMANN, Fritz ,  VAN DEN ABEEL, Peter ,  JACOBS, Jan ,  NEVEJANS, Filip ,  VAN PEE, Willy

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

CPC分类号： C07C263/10 ,  C07C263/20 ,  C07C265/14

摘要： The invention relates to a method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine colour index. According to said method, a two-stage reaction of the corresponding mixtures of diphenylmethane-diamines and polyphenylene-polymethylene polyamines with phosgene is carried out in the presence of at least one inert organic solvent at a high temperature. When the phosgenation is complete, the excess phosgene and solvent are separated off and the product of the reaction is treated with heat. The method is characterised in that the mass ratios of phosgene to hydrogen chloride in the detention apparatus in the second stage of phosgenation are simultaneously 10-30:1 in the liquid phase and 1-10:1 in the gas phase.

公开(公告)号：EP1497259A1

公开(公告)日：2005-01-19

申请号：EP03724984.4

申请日：2003-04-09

申请人： BASF AKTIENGESELLSCHAFT

发明人： STAROSTA, Dieter ,  PFAB, Peter ,  KRASE, Volker ,  SCHMIDT, Andeas ,  KLÖTZER, Matthias ,  OTTERBACH, Andreas

IPC分类号： C07C263/04 ,  B01J6/00

CPC分类号： F28D9/00 ,  B01J10/00 ,  B01J19/0013 ,  B01J2219/00085 ,  C07C263/04 ,  C07C265/00

摘要： Disclosed is a rector for thermally cracking monofunctional and/or polyfunctional carbamates into the corresponding isocyanate and hydroxyl components in the liquid phase, comprising devices which feed heat into the reactor. Said devices are embodied as heat exchange plates that are flooded with a heat-exchanging means. The geometry of the devices, which is characterized by the fact that the outgassing surface is proportional to the volume as well as by the arrangement of the heating surfaces, allows the cracking to take place in a two-phase mixture containing more than 50 percent by volume of gas.

公开(公告)号：EP1073628A1

公开(公告)日：2001-02-07

申请号：EP99920644.4

申请日：1999-04-12

申请人： BASF AKTIENGESELLSCHAFT

发明人： PENZEL, Ulrich ,  SCHARR, Volker ,  STAROSTA, Dieter ,  BOESEL, Hilmar ,  STRÖFER, Eckhard ,  PFEFFINGER, Joachim ,  POPLOW, Frank ,  DOSCH, Jürgen ,  SCHWARZ, Hans, Volkmar ,  NÄUMANN, Fritz ,  VAN DEN ABEEL, Peter ,  JACOBS, Jan ,  NEVEJANS, Filip ,  VAN PEE, Willy

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

CPC分类号： C07C263/10 ,  C07C263/20 ,  C07C265/14

摘要： The invention relates to a method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine colour index. According to said method, a two-stage reaction of the corresponding mixtures of diphenylmethane-diamines and polyphenylene-polymethylene polyamines with phosgene is carried out in the presence of at least one inert organic solvent at a high temperature. When the phosgenation is complete, the excess phosgene and solvent are separated off and the product of the reaction is treated with heat. The method is characterised in that the mass ratios of phosgene to hydrogen chloride in the detention apparatus in the second stage of phosgenation are simultaneously 10-30:1 in the liquid phase and 1-10:1 in the gas phase.