Basf Aktiengesellschaft

Basf Se Corporation

Bernd Weidner

Ekkehard Schwab

Ulrich Penzel

Hartwig Voss

Wolfgang Mackenroth

Steffen Oehlenschläger

Dominic Vanoppen

Steffen Oehlenschlaeger

Konrad Morgenschweis

Gunter Georgi

Dietrich Tittelbach-Helmrich

Joern Mueller

Frederik Van Laar

Juergen Dahlhaus

Frederick Van Laar

The present invention provides a process for hydrogenating aromatic nitro compounds to the corresponding amines in the presence of hydrogenation catalysts, which comprises using hydrogenation catalysts in which nickel and platinum are present on a support in the form of an alloy having an atomic ratio of nickel to platinum in the alloy of between 30:70 and 70:30.

Method for the production of amines

A catalyst comprising nickel on a TiOsupport is obtainable by coprecipitation of It is used, in particular, for the hydrogenation of nitroaromatic compounds.

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The invention provides a process for preparing amines by catalytic hydrogenation of nitroaromatics and subsequent removal of the catalysts from the reaction mixture, which contains at least one aromatic amine and water, which comprises carrying out the removal of the catalysts by means of membrane filtration, which is carried out at a pressure on the suspension side of from 5 to 50 bar, a pressure difference between the suspension side and the permeate side of at least 0.3 bar and a flux rate on the suspension side of from 1 to 6 m/s.

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Wormlage, Germany

Bernd Weidner