Basf Aktiengesellschaft

Basf Se Corporation

Steffen Oehlenschlaeger

Ekkehard Schwab

Hartwig Voss

Ulrich Penzel

Wolfgang Mackenroth

Konrad Morgenschweis

Samuel Neto

Joana Coelho Tsou

Dominic Vanoppen

Bernd Weidner

Frederik Van Laar

Johann-Peter Melder

Eckhard Stroefer

Klemens Massonne

Andreas Raichle

Stefan Maixner

Andreas Woelfert

Andreas Brodhagen

Kirsten Dahmen

Filip Nevejans

Martin Sohn

Gunther Van Cauwenberge

Georg Krug

Michael Zoellinger

Johannes Buettner

Kai Michael Exner

Stefanie Haase

Holgar Braunsberg

Thomas Beuermann

Dietrich Tittelbach-Helmrich

Sven Boehmeke

Frederick Van Laar

A process for preparing tolylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst

Method for producing toluylenediamine by hydrogenating dinitrotoluene

The invention relates to a process for the continuous preparation of toluenediamine by liquid-phase hydrogenation of dinitrotoluene by means of hydrogen in the presence of a suspended, nickel-comprising catalyst in a reactor with a product isolation unit downstream of the reactor to give a product output from the reactor comprising a liquid phase comprising toluenediamine and dinitrotoluene, in which the nickel-comprising catalyst is suspended, wherein the concentration of dinitrotoluene in the liquid phase of the product output from the reactor in the region between the reactor and the downstream product isolation unit is set to a value in the range from 1 to 200 ppm by weight, based on the total weight of the liquid phase of the product output from the reactor.

Process for preparing toluenediamine by hydrogenation of dinitrotoluene

The invention relates to a process for preparing polyisocyanates by reacting primary amines with phosgene, which comprises the steps

Method for producing polyisocyanates

Processes are described comprising: (i) providing a reactant comprising 1,2-dichloroethane; and (ii) reacting the reactant with ammonia to form a reaction product comprising one or more ethylene amines and hydrogen chloride, wherein the reaction is carried out in the presence of an organic, nitrogen- or phosphorus-containing compound which reacts with the hydrogen chloride to form an ionic liquid.

Processes for producing ethylene amines

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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Ludwigshafen, Germany

Steffen Oehlenschlaeger