Basf Se Corporation

Lucia Koenigsmann

Ekkehard Schwab

Andreas Heussler

Nikolaus Zafred

Christian Schneider

Michael Nilles

Tilmann Steinmetz

Thomas Heidemann

Maximilian Vicari

Michael Slany

Gerrit Waters

Lothar Seidemann

Andreas Walch

Kai Rainer Ehrhardt

Dirk Grossschmidt

Dieter Stuetzer

Klaus-Peter Pfaff

Piotr Makarczyk

Martin Kamasz

Leo Denissen

Juergen Schubert

Guenther Gottwald

Celine Liekens

Juergen Michel

The invention relates to a process for obtaining at least one aromatic amine from a liquid mixture comprising water and the at least one aromatic amine by extracting with at least one nitroaromatic in an extraction column () to form an essentially water-comprising raffinate stream and an extract stream comprising the at least one nitroaromatic and the aromatic amine. The extraction column () is divided by a dividing wall () into two regions (), and, in the case of an amount of liquid for separation which is less than a minimum cross sectional loading of the entire extraction column (), the liquid mixture to be separated is fed only to one of the regions () of the extraction column () divided by the dividing wall (). The invention further relates to a process for preparing an aromatic amine and to an apparatus for separating a liquid mixture comprising water and at least one aromatic amine by extracting with at least one nitroaromatic, comprising an extraction column ().

Process for preparing an aromatic amine and apparatus therefor

The invention relates to a process for obtaining at least one aromatic amine from a liquid mixture comprising water and the at least one aromatic amine by extracting with at least one nitroaromatic in an extraction column () to form an essentially water- comprising raffinate stream and an extract stream comprising the at least one nitroaromatic and the aromatic amine. The extraction column () is divided by a dividing wall () into two regions (), and, in the case of an amount of liquid for separation which is less than a minimum cross sectional loading of the entire extraction column (), the liquid mixture to be separated is fed only to one of the regions () of the extraction column () divided by the dividing wall (). The invention further relates to a process for preparing an aromatic amine and to an apparatus for separating a liquid mixture comprising water and at least one aromatic amine by extracting with at least one nitroaromatic, comprising an extraction column ().

What is proposed is a process for preparation and distillative workup of diphenylmethane diisocyanate (MDI), proceeding from a benzene-comprising feedstream, in which, in

Process for preparation and preferably distillative workup of diphenylmethane diisocyanate (MDI)

The present invention relates to a process for the preparation of cis-2-(2-methylprop-1-enyl)-4-methyltetrahydropyran comprising the catalytic hydrogenation of 2-(2-methylprop-1-enyl)-4-methylenetetrahydropyran in the presence of hydrogen and a heterogeneous catalyst comprising ruthenium on a support and subsequently bringing the compounds obtained in this way into contact with a strongly acidic cation exchanger.

Method for producing cis-rose oxide

In the process for hydrogenating butadiyne over a catalyst which comprises at least one platinum group metal on an inorganic metal oxide as a support, the hydrogenation is performed at a pressure in the range from 1 to 40 bar and a temperature in the range from 0 to 100&#xb0; C., and from 0.05 to 5% by weight, based on the overall catalyst, of platinum group metal is present on the support.

Process for hydrogenating butadiyne

A process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compound in a fluidized-bed reactor, in which a gaseous reaction mixture comprising the nitro compound and hydrogen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.

Process for preparing aromatic amines in a fluidized-bed reactor

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Stuttgart, Germany

Lucia Koenigsmann