Basf Aktiengesellschaft

Basf Se Corporation

Manfred Stroezel

Gerd Kaibel

Carsten Oost

Udo Rheude

Heinz Etzrodt

Dietmar Weller

Hagen Jaedicke

Bernhard Bockstiegel

Klaus Reimer

Achim Stammer

Franz Josef Brocker

Mathias Haake

Jochem Henkelmann

Ekkehard Schwab

Andreas Ansmann

Walter Dobler

Alois Kindler

Werner Aquila

Heinz Hannebaum

Hartwig Fuchs

Christian Tragut

Lothar Laupichler

Werner Hoffmann

Wolfgang Rohde

Thomas Krug

Harald Rust

Franz J Broecker

Michael Koch

Ralf-Thomas Rahn

Joachim Pfeffinger

Rudolf Erich Lorenz

Lothar Janitschke

Harald Laas

Hermann Petersen

Eckhard Ströfer

Michael Jolyon Sprague

Peter Schreyer

Wolfram Burst

Martin Sohn

Fritz Beck

Christian Miller

Susanne Stutz

Gerald Meyer

Luise Spiske

Alfred Thome

Otto Kumberger

Christopher William Rieker

Heinz Nohe

Franz Josef Br&ouml;cker

Hans Christoph Horn

Peter Tavs

Lothar Arnold

Wulf Kaiser

Christian Knoll

Norbert Neth

Ulrich Kammel

Detlef Ruff

Melanie Maas-Brunner

Hans-Juergen Scheiper

Karl-Heinz Sartor

Wolfgang J&uuml;rgen P&ouml;pel

Guenter Wegner

Franz Josef Bröcker

Gerd Rohrbacher

Juan Aiscar

Peter Trübenbach

Diethard Francke

Ulrich H&ouml;rcher

Wilfried Berning

Ulrich Horcher

Marco Millies

Hans-Joachim Müller

Jürgen Heners

A process is proposed for reprocessing the exhaust gas from a plant for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen for the purpose of utilization of at least a part of the nitrogen monoxide and if appropriate hydrogen present in the exhaust gas for producing hydroxylamine or hydroxylammonium salts, which comprises, in a first separation stage, selectively separating off nitrogen monoxide from the exhaust gas of the plant for producing hydroxylamine or hydroxylammonium salts.

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The invention relates to a process and apparatus for the isothermal operation of heterogeneously catalyzed reactions involving at least three phases in the form of a gaseous phase, a liquid phase and a solid phase. The invention provides apparatus for carrying out reactions involving a gaseous phase, a liquid phase and a solid phase, comprising (i) a dispersing element for dispersing a gas phase in a liquid phase to generate a reaction fluid, (ii) at least one reactor which possesses an inlet, an outlet and a reactor space bounded by heat-removing walls which are spaced apart substantially uniformly along the main flow axis of the reaction fluid, and which is fitted with catalyst-coated metal fabric, and (iii) a feed line which routes the reaction fluid from the dispersing element to the reactor inlet and is sufficiently short that the degree of dispersion of the reaction fluid does not substantially change in the course of the passage through the feed line.

Isothermal operation of heterogeneously catalyzed three phase reactions

A process is proposed for the distillation or reactive distillation of a mixture that includes at least one toxic component, the process being carried out in a column containing a structured packing, having at least one packing layer () having a lower end () and an upper end (), the packing layer having an internal geometry varying over its height, in such a manner that in the distillation or reactive distillation, in a first, lower region () of the packing layer () a bubbling layer having a predominantly disperse gas phase can be established and simultaneously in a second, upper region () of the packing layer () a film flow having a predominantly continuous gas phase can be established.

Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent

A process is proposed for the separation of Ccuts by distillation into a low-boiler (A), a medium-boiler (B) and a high-boiler fraction (C) in one or more dividing-wall columns (TK), in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper, common column region (), a lower, common column region (), a feed part () with rectifying section () and stripping section (), and a withdrawal part () with rectifying section () and stripping section (), with feed of the Ccut (A, B, C) into the central region of the feed part (), discharge of the high-boiler fraction (C) from the bottom of the column, discharge of the low-boiler fraction (A) via the top of the column, and discharge of the medium-boiler fraction (B) from the central region of the withdrawal part (), wherein the dividing ratio of the liquid reflux at the upper end of the dividing wall (T) is set in such a way that the proportion of high-boiling key components in the liquid reflux over the stripping section () of the withdrawal part at the upper end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B), and wherein the heating power in the evaporator at the bottom of the dividing-wall column (TK) is set in such a way that the concentration of the low-boiling key components in the liquid at the lower end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B).

The invention relates to a method for cleaning crude terephthalic acid by means of catalytic, hydrogenating aftertreatment using a catalyst material containing at least one hydrogenation metal applied to a carbon carrier consisting of carbon fibres. The invention also relates to a catalyst consisting of the at least one catalyst material containing the at least one hydrogenation metal applied to the carbon fibres, the BET surface of the carbon carrier being &#x3c;500 m/g, and a monolithic catalyst consisting of said at least one catalyst material containing the at least one hydrogenation material applied to the carbon fibres, and at least one support element or skeleton element which differs from the catalyst material and is connected to the same, said element mechanically supporting the catalyst material and maintaining the same in a monolithic form. The invention further relates to a method for producing the monolithic catalyst and the use thereof, a reactor containing a plane catalyst material in the form of woven fabric, knitted fabric and/or felt, the use of the same and a method for the selective hydrogenation of carbon-carbon double or triple bonds and/or hydrogenable functional groups in organic compounds containing the same.

Method for cleaning crude terephthalic acid and catalysts suitable for the same and containing carbon fibers

A process for preparing at least one unsaturated alcohol (B) comprises the steps (I) to (III) below:

Method for preparing acetylene alcohols and their secondary products

Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH /KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetates diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.

Preparation of higher &agr;, &bgr;-unsaturated alcohols

The invention relates to a packing sheet having straight-line kinks which divide the packing sheet into kink areas which have a width a, measured from kink edge to kink edge, and passage apertures, where a proportion X of at least 60% of the passage apertures has a separation b of at most 0.4 a from a kink edge.

Packing for heat-exchange and mass-transfer columns

A structured packing for heat exchange and mass transfer between a liquid and a gas in a column having at least one packing layer with a first, lower end and a second, upper end is described, the packing layer having an internal geometry which varies over its height so that by suitably setting the liquid and gas flow rates in a first, in particular lower, region of the packing layer a bubbling layer having a predominantly disperse gas phase forms in a targeted manner and simultaneously in a second, in particular upper, region of the packing layer a film flow of the liquid having a predominantly continuous gas phase forms in a targeted manner.

Structured packing for heat exchange and mass transfer

Selective liquid-phase hydrogenation of &agr;,&bgr;-unsaturated carbonyl compounds

Preparation of C10-C30-alkenes by partial hydrogenation of alkynes over fixed-bed supported palladium catalysts

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Ilvesheim, Germany

Manfred Stroezel