公开(公告)号：EP1053222B1

公开(公告)日：2003-05-02

申请号：EP99906202.9

申请日：1999-01-26

申请人： BASF AKTIENGESELLSCHAFT

发明人： STRÖFER, Eckhard ,  JACOBS, Jan ,  SEYFERT, Wilfried ,  SCHWARZ, Hans, Volkmar ,  SCHWEERS, Olaf ,  SCHARR, Volker ,  PENZEL, Ulrich

IPC分类号： C07C209/78 ,  C07C263/10 ,  C07C211/50 ,  C07C265/14

CPC分类号： C07C209/78 ,  C07C263/10 ,  C07C211/50 ,  C07C265/12 ,  C07C265/14

摘要： The invention relates to a method for the production of methylenedi(phenylamine) by reacting aniline with formaldehyde in the presence of acid catalysts. The method is characterized in that aniline and optionally an acid catalyst are treated in a semi-continuos method; formaldehyde and optionally an acid catalyst are fed through a mixing organ in a circuit in which aniline, optionally an acid catalyst and optionally an already added formaldehyde are circulated and tempering the reaction mixture at a temperature of over 75 °C after feeding at least 50 % of the total amount of formaldehyde. The invention also relates to a method for the production of polyisocyanates by phosgenating the amines thus obtained and the polyisocyanates obtained according to this method.

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.

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：EP1053222A1

公开(公告)日：2000-11-22

申请号：EP99906202.9

申请日：1999-01-26

申请人： BASF AKTIENGESELLSCHAFT

发明人： STRÖFER, Eckhard ,  JACOBS, Jan ,  SEYFERT, Wilfried ,  SCHWARZ, Hans, Volkmar ,  SCHWEERS, Olaf ,  SCHARR, Volker ,  PENZEL, Ulrich

IPC分类号： C07C209/78 ,  C07C263/10 ,  C07C211/50 ,  C07C265/14

CPC分类号： C07C209/78 ,  C07C263/10 ,  C07C211/50 ,  C07C265/12 ,  C07C265/14

摘要： The invention relates to a method for the production of methylenedi(phenylamine) by reacting aniline with formaldehyde in the presence of acid catalysts. The method is characterized in that aniline and optionally an acid catalyst are treated in a semi-continuos method; formaldehyde and optionally an acid catalyst are fed through a mixing organ in a circuit in which aniline, optionally an acid catalyst and optionally an already added formaldehyde are circulated and tempering the reaction mixture at a temperature of over 75 °C after feeding at least 50 % of the total amount of formaldehyde. The invention also relates to a method for the production of polyisocyanates by phosgenating the amines thus obtained and the polyisocyanates obtained according to this method.