Basf Aktiengesellschaft

Basf Se Corporation

Konrad Morgenschweis

Ekkehard Schwab

Hartwig Voss

Ulrich Penzel

Steffen Oehlenschlaeger

Wolfgang Mackenroth

Steffen Oehlenschläger

Dominic Vanoppen

Bernd Weidner

Frederik Van Laar

Georg Krug

Thomas Beuermann

Dietrich Tittelbach-Helmrich

Frederick Van Laar

The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated off, a measurement of the absorption of UV/VIS radiation by the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.

Method for producing aromatic amines or aliphatic amino alcohols

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

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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Dresden, Germany

Konrad Morgenschweis