公开(公告)号：AU2003293892A1

公开(公告)日：2004-07-14

申请号：AU2003293892

申请日：2003-12-16

Applicant: BASF AG

Inventor： PALLASCH HANS-JURGEN ,  STROEFER ECKHARD ,  BLANKERTZ HEINRICH-JOSEF ,  WOLFERT ANDREAS

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

Abstract: Method for purifying isocyanates (I) by distillation. Method for purifying isocyanates by distillation comprises: (a) first separating a stream (1) containing (I), high and low boilers and non-evaporatable residue (X) by distillation (at least one theoretical plate) into a sidestream (2), containing (I) and (X), and a vapor stream (3), containing (I) and low boilers; (b) (X) in (2) is kept separate from (3) and/or material streams that consist at least partly of (3); (c) another (I)-containing vapor stream (4) is separated from (2), leaving stream (8) consisting essentially of (X); (d) streams (4) and (3) are separated by distillation into 3 streams (5,6,7) of different boiling ranges, where the lowest boiler (5) contains a significant proportion of the low boilers in (1), the highest boiler (7) contains a significant proportion of the high boilers in (1) and the middle stream (6) is essentially (I).

公开(公告)号：AU2003293873A1

公开(公告)日：2004-07-14

申请号：AU2003293873

申请日：2003-12-13

Applicant: BASF AG

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

IPC: C01B7/07 ,  C01B32/80 ,  C07C263/10 ,  B01D53/70

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：AU2003290054A1

公开(公告)日：2004-07-14

申请号：AU2003290054

申请日：2003-12-16

Applicant: BASF AG

Inventor： WOLFERT ANDREAS ,  PALLASCH HANS-JURGEN ,  STROEFER ECKHARD ,  BLANKERTZ HEINRICH-JOSEF

IPC: B01D3/00 ,  B01F3/08 ,  B01F5/00 ,  B01J19/24 ,  C07C263/10 ,  C07C265/14 ,  B01J10/00

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：DE10260027A1

公开(公告)日：2004-07-08

申请号：DE10260027

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: C07C263/20 ,  C07C263/18 ,  C07C263/10 ,  B01D1/00 ,  B01D5/00

Abstract: The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.

公开(公告)号：DE10242400A1

公开(公告)日：2004-03-18

申请号：DE10242400

申请日：2002-09-12

Applicant: BASF AG

Inventor： WALSDORFF CHRISTIAN ,  FIENE MARTIN ,  ADAMI CHRISTOPH ,  STROEFER ECKHARD ,  HARTH KLAUS

IPC: B01J23/46 ,  C01B7/04

Abstract: Production of chlorine by catalytic gas-phase oxidation of hydrogen chloride (HCl), in which an HCl-containing gas and an oxygen-containing gas are fed into a reaction zone containing a fixed bed of catalyst to give a product gas comprising chlorine, oxygen, HCl and water vapor, comprises removing a recycle stream from the product gas and recycling it to the reaction zone.

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：DE10222163A1

公开(公告)日：2003-11-27

申请号：DE10222163

申请日：2002-05-17

Applicant: BASF AG

Inventor： WAGNER KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROEFER ECKHARD ,  HECK LUDWIG E ,  HILDENBRAND PETER

IPC: C07D323/06

Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

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：DE10131787A1

公开(公告)日：2003-01-16

申请号：DE10131787

申请日：2001-07-04

Applicant: BASF AG

Inventor： WOSTBROCK KARL-HEINZ ,  THIEL JOACHIM ,  GERBER BERND ,  KRUEGER HEINZ ,  STROEFER ECKHARD ,  KERTH STEFFEN ,  SACHWEH BERND ,  RUMPF BERND ,  WEBER MARKUS

IPC: B01D3/16 ,  B01J19/30 ,  B01J19/32 ,  C01B21/14

Abstract: The invention relates to a method for the production of a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of an hydroxylammonium salt and a base in a plate column having at least two mechanical plates. The invention is characterized in that packings or structured packings are placed above at least one of the plates of the plate column along the cross section of said column.

公开(公告)号：DE59804740D1

公开(公告)日：2002-08-14

申请号：DE59804740

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.