Basf Se Corporation

Kerstin Heinen

Torsten Mattke

Eckhard Stroefer

Kai Thiele

Wolfgang Gerlinger

Stefan Karbach

Ulrich Penzel

Wolfgang Mackenroth

Stefan Maixner

Jan-Dirk Arndt

Andreas Wölfert

Veronika Wloka

Nawid Kashani-Shirazi

Burkhardt Dames

Julia Leschinski

Wolfgang Kollenberg

Johannes Jacobs

Tsung-Chieh Cheng

Leo Denissen

Silvia Tauro

Viktor Ladnak

Wolfgang Haip

Klaus-Peter Metzner

Christian Tragut

Myung Un Won

Andrea Schmidt

A process for preparing an aromatic polyamine mixture including 4,4'-methylenedi(phenylamine) and higher homologues of MDA is provided. The process includes steps of (i) reaction of aniline with formaldehyde by means of an acid catalyst to form a crude product mixture (I), (ii) neutralization of the crude product mixture (I) and removal of the salts formed; (iii) isolation of aniline; (iv) distillation of the resulting crude product mixture so as to separate off (iv-1) a mixture (II) of MDA isomers (II-1) containing from 8 to 20% by weight of 4,4&#x2032;-methylenedi(phenylamine) and not more than 0.3% by weight of secondary components (II-2) and (iv-2) a low boiler mixture of at least 55% by weight of secondary components (II-2) and MDA isomers (II-1); and (v) recirculation of the mixture (II).

Process for preparing an aromatic polyamine mixture

The subject of the present invention is an apparatus for the intermixing of a fluid stream with a fluid stream, which comprises a pipe through which the fluid stream is routed, at least two distributors for delivering the fluid stream being arranged inside the pipe, this arrangement of the distributors being made possible by bores in the casing of the pipe, and these distributors having a free flow cross section which is constant or decreases continuously, as seen in the main direction of flow of the fluid, and the distributors having one or more rows of holes for delivering the fluid into the fluid.

Method and apparatus for the intermixing of two fluid streams

The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber () to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice () arranged coaxially to the mixing chamber () and the phosgene being added through feed orifices () in at least two planes () arranged at right angles to the axis () of the mixing chamber (), or the phosgene being added through the orifice () arranged coaxially to the mixing chamber and the amine through the feed orifices () in at least two planes () arranged at right angles to the axis () of the mixing chamber (). At least one plane () is arranged upstream and at least one plane () downstream of the orifice () arranged coaxially to the mixing chamber () in main flow direction of the reaction mixture. The mean residence time of the reaction mixture in the mixing chamber () is not more than 20 ms.

Process for preparing aromatic isocyanates

The present invention relates to a process for continuously preparing a mononitrated organic compound, especially a process for preparing mononitrobenzene. The invention relates more particularly to an improved continuous adiabatic process for preparing nitrobenzene.

Process for preparing mononitrated organic compounds

Shaped bodies having catalytic properties which can be obtained by a process comprising the steps:

Use of shaped bodies having catalytic properties as reactor internals

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Lorsch, Germany

Kerstin Heinen