Basf Aktiengesellschaft

Basf Se Corporation

Anton Meier

Joaquim Henrique Teles

Johann-Peter Melder

Matthias Frauenkron

Volkmar Menger

Christian Müller

Michael Schelper

Michael Hesse

Christoph Sigwart

Wilhelm Ruppel

Ulrike Wegerle

Till Gerlach

Ortmund Lang

Wolfgang Reif

Frank Haese

Bernd Rumpf

Thomas Genger

Peter Resch

Beatrice Röβler-Feigel

Rolf Pinkos

Ulrich Müller

Rocco Paciello

Wolfgang Harder

Karsten Eller

Thomas Schaub

Lothar Franz

Frank-Friedrich Pape

Marco Bosch

Gerd-Dieter Tebben

Kai Gumlich

Andrea Haunert

Alexander Hauk

Alfred Krause

Wolfgang Gerlinger

Hans Hammer

Klaus-Peter Pfaff

Donata Maria Fries

Walter Himmel

Mirko Kreitschmann

Marek Pazicky

Tanja Kirchner

Arthur Höhn

Franz Borgel

Philip Buskens

Susanne Szeschkus

Heinz Rütter

Beatrice Rössler-Feigel

Guenther Ruider

Michael Salla

Jörg Unger

Helmut Berrsche

Mathieu Chabanas

Beatrice Roessler-Feigel

The invention relates to a tube bundle reactor with a flat feed hood. Alternatively, the release hood may also have a flat design. The flat design reduces the heat of reaction which arises in the hood in the case of reaction types which take place not only in the tube bundle (uncatalyzed reactions and reactions with homogeneously distributed catalyst). This greatly suppresses undesired reactions which already take place in the hood owing to accumulated heat, which achieves a higher selectivity in the case of thermally sensitive reactions. In addition, the thermal distribution within the hoods can be controlled precisely. The tube bundle reactor comprises a tube bundle which has a feed end which is connected to a feed hood of the tube bundle reactor, wherein the feed hood is configured in a flat design with a cross-sectional area at the feed end and an internal volume, and the ratio of internal volume to cross-sectional area is less than 0.35 m. The invention is further implemented by means of a process for operating a tube bundle reactor, comprising: introducing a reactant mixture into a tube bundle and converting at least a proportion of the reactant mixture within the tube bundle to a product. The introducing comprises: feeding the reactant mixture into an interior of a feed hood of the tube bundle reactor and passing the reactant mixture on into a feed end of the tube bundle in the form of a fluid stream. The fluid stream has a cross-sectional area on entry into the feed end, and the interior of the feed hood through which the fluid stream flows has an internal volume; where the ratio of internal volume to cross-sectional area is less than 0.35 m.

Tube bundle reactor for uncatalyzed or homogeneously catalyzed reactions

A method for reliably avoiding backflow in the transport of a liquid under pressure via a transport pipe (), in which a shut-off device () with differential pressure switching is arranged, into a container () which is under pressure and which comprises the liquid to be transported and/or another liquid is proposed, wherein a pressure accumulator () which is filled with the liquid to be transported up to a certain level and above the liquid level, in direct contact with the liquid to be transported, with an inert gas is arranged in the transport pipe () upstream from the shut-off device () in the transport direction, the inert gas being provided in the pressure accumulator () under an excess pressure and in an amount relative to the container () to be filled which are designed so that, in the case of a drop in the pressure in the transport pipe (), the inert gas ensures a positive pressure difference in the transport pipe () to the container () over a period which is at least as long as the reaction time of the shut-off device () and the shut-off device () has an emptying pipe () with emptying valve ().

Method for safely preventing backflowing in the conveying of a fluid

The invention relates to a process for preparing formic acid by reaction of carbon dioxide with hydrogen in a hydrogenation reactor in the presence of a transition metal complex as a catalyst comprising at least one element from group 8, 9 or 10 of the Periodic Table and at least one phosphine ligand with at least one organic radical having at least 13 carbon atoms, of a tertiary amine and of a polar solvent to form a formic acid-amine, adduct, which is subsequently dissociated thermally to formic acid and the corresponding tertiary amine. on unit.

Process for preparing formic acid by reaction of carbon dioxide with hydrogen

The present invention relates to a process for preparing at least one monocyclic ketone having from 4 to 20 carbon atoms by reacting a mixture Gcomprising at least one monocyclic olefin having from 4 to 20 carbon atoms with a mixture Gcomprising at least dinitrogen monoxide, wherein said reaction is performed adiabatically.

Process for preparing cyclic ketones

The present invention relates to a process for preparing 4-pentenoic acid, at least comprising the oxidation of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide, and to the use of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide for preparing 4-pentenoic acid. In the context of the present invention, the mixture (G) is preferably obtained as a by-product of the oxidation of cyclopentene to cyclopentanone by means of dinitrogen monoxide.

Process for preparing 4-pentenoic acid

The present invention relates to a process for preparing at least one cyclic compound with Z cycles and 7 to 16 carbon atoms with a keto group, at least comprising the stages:

Process for preparing pure cyclododecanone

Process for recovering cyclododecatriene (CDT) from a solution containing CDT and high boilers such as deactivated catalyst and polymers, which includes feeding the solution into a preheater and heating it, subsequently depressurizing it through a downstream pressure maintenance device and feeding the resulting two-phase mixture into a helical tube evaporator and there reducing the CDT content of the liquid phase by partial evaporation and discharging a gaseous product stream having an increased concentration of CDT.

Method for obtaining cyclododecatriene by evaporation

Processes comprising: (a) providing a first reactant comprising a bioethanol; and (b) reacting the first reactant with a second reactant comprising a component selected from the group consisting of ammonia, primary amines, secondary amines and mixtures thereof, in the presence of hydrogen and a catalytically effective amount of a heterogeneous hydrogenation/dehydrogenation catalyst to form an ethylamine; wherein the catalyst has been activated at a temperature of 100 to 500&#xb0; C. for at least 25 minutes; wherein prior to activation the catalyst comprises: (i) 20 to 65% by weight of a support material comprising one or both of zirconium dioxide (ZrO) and aluminum oxide (AlO), (ii) 1 to 30% by weight of oxygen-comprising compounds of copper, calculated as CuO, and (iii) 21 to 70% by weight of oxygen-comprising compounds of nickel, calculated as NiO; and wherein after activation the catalyst has a CO uptake capacity of &#x3e;110 &#x3bc;mol of CO/g of the catalyst.

Processes for preparing ethylamines

Process for preparing an ethylamine by reacting ethanol with ammonia, a primary amine or a secondary amine in the presence of hydrogen and a heterogeneous catalyst, in which a biochemically prepared ethanol (bioethanol) in which the concentration of sulfur and/or sulfur-containing compounds has been reduced beforehand by bringing it into contact with an adsorbent is used.

Method for producing an ethylamine

Process for separating triethanolamine continuously by distillation from a mixture of monoethanolamine, diethanolamine and triethanolamine together with ethanolamine ethers and water obtained by reaction of ammonia with ethylene oxide in the liquid phase under superatmospheric pressure and at elevated temperature, in which the mixture is distilled in two stages. The low-boiling fraction and the high-boiling fraction are taken off and discharged in the first stage and the intermediate-boiling fraction comprising &#x3e;99.4% by weight of triethanolamine and &#x3c;0.2% by weight of diethanolamine is distilled in the second stage. The distillation of the mixture is preferably carried out in a first column and a second column connected to this or in a dividing wall column.

Method for separating triethanolamin from a mixture obtainable by ammonia and ethylene oxide reaction

The invention provides a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, their monoesters or diesters and the monoesters or diesters of polytetrahydrofuran having a low color number in the presence of a catalyst, which comprises converting crude tetrahydrofuran which has been prepared in a manner per se into pure tetrahydrofuran by distillation, subsequently subjecting the latter to essentially complete hydrogenation and using the high-purity tetrahydrofuran obtained in this way for the polymerization directly after its preparation.

Method for producing polytetrahydrofurane having a low color indices

Process for purifying triethylenediamine (TEDA) by disillation, in which the fractionation is carried out in a dividing wall column.

Isolation of high-purity triethylenediamine (TEDA) by distillation

At least one alkanolamine is prepared by reacting ammonia with alkylene oxide in a reaction space in the presence of a catalyst to give monoalkanolamine or dialkanolamine or trialkanolamine or a mixture of two or three of these compounds, the distribution of the various alkanolamines within the product spectrum being controlled by means of the temperature in the reaction space, by a process in which the temperature is established by regulating the temperature profile in the reaction space.

Method for producing alkanolamines

In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, supported heterogeneous catalyst comprising at least one metal of groups 7 to 10 of the Periodic Table of the Elements as active metal.

Method for the production of polytetrahydrofuran with low color index

Method for processing pTHF polymerization catalysts

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Birkenheide, Germany

Anton Meier