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：AU2003277868A1

公开(公告)日：2004-04-23

申请号：AU2003277868

申请日：2003-09-18

Applicant: BASF AG

Inventor： STROFER ECKHARD ,  SCHOLL STEPHAN ,  SOHN MARTIN ,  WOLFERT ANDREAS ,  PALLASCH HANS-JURGEN ,  BREDEHOFT JAN PETER

IPC: B01D1/06 ,  C07C263/10 ,  C07C263/20 ,  C07C265/14 ,  B01D3/00

Abstract: Isocyanates are prepared by reacting primary amines with phosgene in a reactor by a process in which a reaction discharge is present in the form of a suspension which contains the isocyanate to be prepared, as a liquid, and carbamyl chlorides as a solid, and the suspension is worked up in a film evaporator, and this process is carried out in a production plant.

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：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.