公开(公告)号：AU2003293872A1

公开(公告)日：2004-07-14

申请号：AU2003293872

申请日：2003-12-13

Applicant: BASF AG

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

公开(公告)号：DE10260094A1

公开(公告)日：2004-07-01

申请号：DE10260094

申请日：2002-12-19

Applicant: BASF AG

Inventor： WOELFERT ANDREAS ,  PALLASCH HANS-JUERGEN ,  STROEFER ECKHARD ,  BLANKERTZ HEINRICH-JOSEF

IPC: B01D3/00 ,  B01F3/08 ,  B01F5/00 ,  B01J19/24 ,  C07C263/10 ,  C07C265/14

Abstract: The invention relates to a method for producing (cyclo)aliphatic isocyanates by reacting, in an organic solvent, primary (cyclo)aliphatic amines with phosgene in the liquid phase, and to devices for carrying out this method.

公开(公告)号：DE10260084A1

公开(公告)日：2004-07-01

申请号：DE10260084

申请日：2002-12-19

Applicant: BASF AG

Inventor： SOHN MARTIN ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PENZEL ULRICH ,  PALLASCH HANS-JUERGEN ,  ABEEL PETER VAN DEN ,  DEBERDT FILIP ,  JACOBS JAN D ,  MACKENROTH WOLFGANG

IPC: C01B7/07 ,  C01B32/80 ,  C07C263/10 ,  C07C263/20 ,  C01B31/28

Abstract: The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.

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：DE10158813A1

公开(公告)日：2003-06-12

申请号：DE10158813

申请日：2001-11-30

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  ARMBRUSTER HARALD ,  EGBERS GITTA ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  HECK LUDWIG E ,  HILDENBRAND PETER ,  ZEINER HARTMUT ,  SCHOLL STEPHAN ,  GOERTZ HANS-HELMUT

IPC: C08G2/08 ,  C08G4/00 ,  C08G2/10

Abstract: According to the invention, the production of oxymethylene homo- or co-polymers from an aqueous solution of formaldehyde and polyoxymethylene glycols is achieved, whereby 1) in a separation stage, water and formaldehyde are at least partly separated out from the aqueous solution, such that a phase containing polyoxymethylene glycols is obtained, in which the molar ratio of polyoxymethylene glycols to formaldehyde is greater than 1:0.6 and 2) the polyoxymethylene glycols obtained in stage 1) are reacted in the presence of polycondensation catalysts with abstraction of water to give oxymethylene homo- or co-polymers.

公开(公告)号：DE10158160A1

公开(公告)日：2003-06-12

申请号：DE10158160

申请日：2001-11-28

Applicant: BASF AG

Inventor： WOELFERT ANDREAS ,  MUELLER CHRISTIAN ,  STROEFER ECKHARD ,  PFEFFINGER JOACHIM ,  WEBER MARKUS

IPC: C07C263/10 ,  B01J12/00 ,  C07C265/14

Abstract: The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.

公开(公告)号：DE10124386A1

公开(公告)日：2002-11-28

申请号：DE10124386

申请日：2001-05-18

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  KAIBEL GERD ,  STAMMER ACHIM ,  OOST CARSTEN ,  SOHN MARTIN ,  STROEZEL MANFRED ,  DOBLER WALTER

IPC: B01D3/26 ,  B01D3/00 ,  B01J19/32 ,  C07B63/00 ,  C07C17/38 ,  C07C263/20 ,  C07C265/14 ,  C07C17/383

Abstract: Column with packing is used for distillation/reactive distillation of mixture with toxic component(s). Packing layer(s) has upper and lower end, with variable internal geometry over height (H). Lower zone (6) of packing layer, with higher flow resistance, gives bubbling layer with mainly dispersed gas phase and upper zone (7) develops film flow with mainly continuous gas phase. Column with a packing is used for the distillation or reactive distillation of a mixture, with at least one toxic component. At least one packing layer has an upper and a lower end, with a variable internal geometry over its height (H). The lower zone (6) of the packing layer, with a higher flow resistance, gives a bubbling layer with a mainly dispersed gas phase and, at the same time, the upper zone (7) develops a film flow with a mainly continuous gas phase.

公开(公告)号：DE10064196A1

公开(公告)日：2002-07-11

申请号：DE10064196

申请日：2000-12-22

Applicant: BASF AG

Inventor： BREDEHOEFT JAN PETER ,  PALLASCH HANS-JUERGEN ,  HECK LUDWIG E ,  STROEFER ECKHARD

IPC: B01D3/00 ,  B01D3/32 ,  C07C263/10 ,  B01D1/30 ,  C07B61/00

Abstract: Apparatus for performing chemical reactions comprises at least one distillation column (10) and/or at least one container as well as at least one rotating evaporator that are connected to each other by connecting elements. Apparatus for performing chemical reactions comprises at least one distillation column (10) and/or at least one container as well as at least one rotating evaporator that are connected to each other by connecting elements. Liquid is completely or partially fed beneath the rotating evaporator via a lower tube plate from a plate (12), packed bed, filling or liquid collector of the distillation column or from an external feed stream. Independent claims are included for; (1) A process for the production of toluylene diisocyanate (TDI) from toluylenediamine, its amine hydrochloride and phosgene using the above apparatus; and (2) A process for the production of methylenediphenyldiisocyanate (MDI) from methylenediphenyldiamine (MDA), its amine hydrochloride and phosgene using the above apparatus.

公开(公告)号：DE10027779A1

公开(公告)日：2001-12-13

申请号：DE10027779

申请日：2000-06-07

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  PALLASCH HANS-JUERGEN ,  MUELLER CHRISTIAN ,  SOHN MARTIN ,  PENZEL ULRICH

IPC: C07C263/10 ,  C07C265/12

Abstract: A process for the production of isocyanates by reaction of amines and phosgene comprises use of the isocyanate as a solvent. The reaction is performed in a reactor column whereby the condensed phase in the sump of the reactor column is at least partially recycled to the concentrating part of the column.

公开(公告)号：DE19827086A1

公开(公告)日：1999-12-23

申请号：DE19827086

申请日：1998-06-18

Applicant: BASF AG

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

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

Abstract: The invention relates to a method for treating distillation residues from the synthesis of toluene diisocyanate by reacting the distillation residues with water. The invention is characterized in that the TDI distillation residues are reacted with water in a continuos or semi-continuos method in a back-mixed reactor in the presence of hydrolyzates.