公开(公告)号：CA2329655A1

公开(公告)日：1999-10-28

申请号：CA2329655

申请日：1999-04-12

Applicant: BASF AG

Inventor： PFEFFINGER JOACHIM ,  NAUMANN FRITZ ,  SCHARR VOLKER ,  POPLOW FRANK ,  PENZEL ULRICH ,  DOSCH JURGEN ,  SCHWARZ HANS VOLKMAR ,  JACOBS JAN ,  VAN DEN ABEEL PETER ,  STAROSTA DIETER ,  NEVEJANS FILIP ,  VAN PEE WILLY ,  BOESEL HILMAR ,  STROFER ECKHARD

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

Abstract: 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 polyphenylenepolymethylene 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：MX2007003037A

公开(公告)日：2007-05-16

申请号：MX2007003037

申请日：2005-09-15

Applicant: BASF AG

Inventor： HENN ROLF ,  MULLER ULRICH ,  STRAUB FERDINAND ,  DOSCH JURGEN

IPC: C07C15/073 ,  C07C2/66

Abstract: La invencion se refiere a un metodo para purificar flujos de suministro que contienen aromados en metodos de polimerizacion o alquilacion, al llevar dichos flujos en contacto con zeolitas. El metodo de la invencion se caracteriza porque el flujo de suministro es guiado sobre al menos dos zeolitas 1 y 2, zeolita 1 teniendo un tamano de pero promedio de entre 0.3 y 0.5 nm, y zeolita 2 un tamano de poro promedio de entre 0.6 y 0.8.