公开(公告)号：EP1706370B1

公开(公告)日：2007-09-05

申请号：EP05700737.9

申请日：2005-01-07

Applicant: BASF Aktiengesellschaft

Inventor： KNÖSCHE, Carsten ,  SOHN, Martin ,  PENZEL, Ulrich ,  PALLASCH, Hans-Jürgen ,  GEORGI, Gunter ,  MACKENROTH, Wolfgang ,  SCHWARZ, Hans Volkmar ,  MAIXNER, Stefan ,  MOLZ, Gerald ,  STROEFER, Eckhard

IPC: C07C209/84 ,  C07C211/50

CPC classification number: C07C209/84 ,  C07C211/50

Abstract: The invention relates to a method for the distillative recovery of TDA from an educt flow containing TDA, high boilers, and low boilers in a partition column in which a partition is disposed in the longitudinal direction of the column so as to form a common upper column zone (2), a common bottom column zone (3), a feeding section (4) that encompasses a rectification section (5) and a stripping section (6), and a withdrawal section (7) encompassing a rectification section (9) and a stripping section (8). The inventive method comprises the following steps: A) the educt flow (13) is delivered to the feeding section (4) of the partition column (1); B) a low boiler fraction is discharged via the top (11) of the column; C) TDA is discharged via a lateral discharge point (14) located in the withdrawal section (7) of the partition column (1); D) a high boiler fraction is discharged via the bottom (12) of the column.

公开(公告)号：EP1713756A1

公开(公告)日：2006-10-25

申请号：EP05701305.4

申请日：2005-02-02

Applicant: BASF Aktiengesellschaft

Inventor： BÜTTNER, Johannes ,  MACKENROTH, Wolfgang ,  HERMANN, Heinrich ,  KONIECZNY, Peter ,  GEBAUER, Jürgen

IPC: C07C201/08 ,  C07C205/06

CPC classification number: C07C201/08 ,  C07C201/14 ,  C07C205/06

Abstract: The invention relates to a method for producing dinitrotoluene, comprising the steps of a) reacting toluene with nitric acid in the presence of sulphuric acid to give mononitrotoluene, b) separating the reaction product of step a) into a mononitrotoluene-containing organic phase and a sulphuric acid-containing aqueous phase, c) reacting the mononitrotoluene-containing organic phase with nitric acid in the presence of sulphuric acid to give dinitrotoluene, d) separating the reaction product of step c) into a dinitrotoluene-containing organic phase and a sulphuric-acid containing aqueous phase, whereby the reaction product of step a) contains 3.0 to 8 wt. % of toluene, in relation to the organic phase, and 0.1 to 1.2 wt. % of nitric acid, in relation to the aqueous phase and the phase separation of step b) is carried out in such a manner that further reaction of toluene with nitric acid is prevented.

公开(公告)号：EP1575908B1

公开(公告)日：2006-08-09

申请号：EP03785813.1

申请日：2003-12-13

Applicant: BASF Aktiengesellschaft

Inventor： SOHN, Martin ,  STROEFER, Eckhard ,  NEVEJANS, Filip ,  PENZEL, Ulrich ,  PALLASCH, Hans-Jürgen ,  VAN DEN ABEEL, Peter ,  DEBERDT, Filip ,  JACOBS, Jan D. ,  MACKENROTH, Wolfgang

IPC: C07C263/20

CPC classification number: C07C263/10 ,  C07C263/20 ,  Y10S203/08 ,  C07C265/14

Abstract: The invention relates to a method for producing isocyanates by reacting amines with phosgene in the presence of inert organic solvents inside a reactor and by subsequently processing the reaction mixture exiting the reactor. The invention is characterized in that the separating out of the solvent ensues in a two-step or multi-step, preferably two-step distillation process, and the solvent is separated out in a first apparatus under a pressure of 0.1 to 15 bar and in a second or other apparatuses under a pressure of 1 to 900 mbar. The condensation heat of the solvent vapor from the first apparatus is used for partially or completely vaporizing solvent in the second apparatus.

公开(公告)号：EP1678118A1

公开(公告)日：2006-07-12

申请号：EP04790484.2

申请日：2004-10-15

Applicant: BASF Aktiengesellschaft

Inventor： VAN LAAR, Frederik ,  SCHWAB, Ekkehard ,  OEHLENSCHLÄGER, Steffen ,  VOSS, Hartwig ,  MACKENROTH, Wolfgang ,  MORGENSCHWEIS, Konrad ,  PENZEL, Ulrich ,  WEIDNER, Bernd

IPC: C07C209/36 ,  B01J23/89

CPC classification number: C07C209/36 ,  B01J21/18 ,  B01J23/892 ,  B01J37/03 ,  B01J37/14 ,  B01J37/18 ,  C07C211/51

Abstract: The invention relates to a method for converting aromatic nitro compounds into the corresponding amines in the presence of hydrogenation catalysts. Said method is characterized in that hydrogenation catalysts are used in which nickel and platinum are provided on a carrier in the form of an alloy, the atomic ratio between nickel and platinum in said alloy ranging between 30:70 and 70:30.