公开(公告)号：DE59607733D1

公开(公告)日：2001-10-25

申请号：DE59607733

申请日：1996-10-30

Applicant: BASF AG

Inventor： LAQUA GERHARD ,  SCHONER ULRICH ,  OTTERBACH ANDREAS ,  SCHWARZ VOLKMAR

IPC: B01J31/04 ,  B01J31/12 ,  B01J31/20 ,  C07B61/00 ,  C07C263/04 ,  C07C265/14 ,  C07C269/04 ,  C07C271/08 ,  C07C271/20

Abstract: Organic diurethanes and/or polyurethanes are prepared by reacting organic diamines and/or polyamines (a) with urea and/or alkyl cabamates (b) and alcohols (c) in the presence of soluble zirconium compounds, preferably zirconium alkoxides, zirconium acetate or zirconium acetylacetonate, as catalyst (d). They can be used for preparing diisocyanates and/or polyisocyanates by thermal dissociation.

公开(公告)号：DE59905323D1

公开(公告)日：2003-06-05

申请号：DE59905323

申请日：1999-01-26

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  JACOBS JAN ,  SEYFERT WILFRIED ,  SCHWARZ VOLKMAR ,  SCHWEERS OLAF ,  SCHARR VOLKER ,  PENZEL ULRICH

IPC: C07B61/00 ,  C07C209/78 ,  C07C211/45 ,  C07C211/50 ,  C07C263/10 ,  C07C265/14

Abstract: The production of methylene-di-phenylamine from aniline (A) and formaldehyde (F) with an acid catalyst (C) comprises placing (A) and possibly (C) in a reactor, feeding (F) and possibly (C) through a mixer into a circulation loop containing (A), possibly (C) and possibly (F), and heating to above 75 degrees C after adding at least 50% of the total (F). Independent claims are also included for: (a) mixtures containing methylene-di-phenylamine (MDA) obtained by this process; (b) a process for the production of polyisocyanates by phosgenation of these mixtures; (c) a process for the production of methylene-diphenylisocyanate (MDI) by phosgenation of MDA (obtained as above) at 50-150 degrees C and 0.5-10 bar, optionally in presence of inert solvent; (d) a process for the production of MDI comprising: (1) the semi-continuous process described above using a mol ratio of (A):(C) = (1:0.6)-(1:0.01) and a mol ratio of (A):(total F) = (1.7:1)-(7.2:1), in which the temperature of the circulating mixture is 20-75 degrees C and the mixture is heated for at least 0.2 hour at above 75 degrees C after adding at least 50% of the (F), (2) neutralization, (3) distillation of water and aniline, (4) phosgenation of the purified MDA as in (c) above, (5) removal of phosgene, hydrogen chloride and possibly solvent at below 150 degrees C under vacuum or inert gas, (6) removal of solvent at not above 1900 degrees C and (7) isolation of 2,2'-, 2,4'- and/or 4,4'-MDI and/or mixtures of at least two of these isomers by distillation at 2-50 mbar and 150-250 degrees C and/or by crystallization; and (e) polyisocyanates obtained by these processes.

公开(公告)号：DE59907555D1

公开(公告)日：2003-12-04

申请号：DE59907555

申请日：1999-06-02

Applicant: BASF AG

Inventor： SCHWARZ VOLKMAR ,  MAURER MARKUS ,  SANDER MICHAEL ,  STROEFER ECKHARD ,  LEUTHOLD RENE ,  HANTEL BURGHARD ,  RICHTER SIEGFRIED ,  THERRE JOERG

IPC: C07C263/20 ,  C07C209/62 ,  C07C211/51 ,  C07C263/10 ,  C07C263/18 ,  C07C265/14 ,  C08G18/50 ,  C08G65/26

Abstract: A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.

公开(公告)号：DE59905881D1

公开(公告)日：2003-07-10

申请号：DE59905881

申请日：1999-12-09

Applicant: BASF AG

Inventor： SANDER MICHAEL ,  PENZEL ULRICH ,  SCHWARZ VOLKMAR ,  STROEFER ECKHARD ,  STUETZER DIETER ,  MUELLER JOERN ,  MAURER MARKUS ,  ZEHNER PETER ,  SCHWAB EKKEHARD ,  BOEHLING RALF ,  VANOPPEN DOMINIC

IPC: B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  B01J19/26 ,  C07B61/00 ,  C07C209/32 ,  C07C209/34 ,  C07C209/36 ,  C07C211/46 ,  C07C211/50 ,  C07C211/51

Abstract: The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, which comprises carrying out the hydrogenation in a vertical reactor whose length is greater than its diameter, having a downward-facing jet nozzle arranged in the upper region of the reactor through which the starting materials and the reaction mixture are fed in, and having an outlet at any desired point of the reactor, through which the reaction mixture is fed back to the jet nozzle in an external circuit by means of a conveying means, and having flow reversal in the lower region of the reactor.

公开(公告)号：DE59907200D1

公开(公告)日：2003-11-06

申请号：DE59907200

申请日：1999-04-12

Applicant: BASF AG

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

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

Abstract: In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, separation of the excess phosgene and solvent after the phosgenation is complete and thermal treatment of the reaction product, the mass ratios of phosgene to hydrogen chloride in the residence time apparatus of the second stage of the phosgenation are at the same time 10-30:1 in the liquid phase and 1-10:1 in the gas phase.

公开(公告)号：DE50003380D1

公开(公告)日：2003-09-25

申请号：DE50003380

申请日：2000-06-16

Applicant: BASF AG

Inventor： REIF MARTIN ,  VAN DEN ABEEL PETER ,  NEVEJANS FILIP ,  SCHWARZ VOLKMAR ,  PENZEL ULRICH ,  SCHARR VOLKER

IPC: C07C263/10 ,  C07C265/14 ,  C08G18/76

Abstract: A process is provided for preparing light-colored isocyanates which can be used for preparing urethane compounds, in particular polyurethanes, for example polyurethane foams.