Basf Se Corporation

Basf Aktiengesellschaft

Frank-Friedrich Pape

Johann-Peter Melder

Ulrich Kohler

Michael Hesse

Manfred Julius

Thomas Krug

Wolfgang Reif

Bram Willem Hoffer

Alfred Krause

Gunther Van Cauwenberge

Karin Pickenäcker

Ekkehard Schwab

Gerd Kaibel

Andreas Henne

Heinz-Josef Kneuper

Detlef Kratz

Frank Haese

Lothar Karrer

Roman Dostalek

Joachim Simon

Roland Bou Chedid

Willi Schmidt

Michael Hullmann

Cristina Freire Erdbrugger

Hans Jochen Mercker

Rolf Hartmuth Fischer

Rainer Becker

Wolfgang Hoelderich

Alexander Weck

Matthias Irgang

Wolf D Mross

Bernd Stein

Lothar Franz

Joachim Wulff-Doring

Gabriele Iffland

Anton Meier

Wolfgang Franzischka

Axel Paul

Ulrich Koehler

Joachim Wulff-Döring

Peter Polanek

Martin Rudloff

Peter Weidlich

Christof Palm

Jürgen Ciprian

Mirko Kreitschmann

Joachim-Thierry Anders

Joachim Wulff-Doering

Ulrich-Dieter Pessel

Franz Borgel

Wulfrich Friedemann Beer

Wolfgang Gunkel

Ulrich Köhler

Klaus Beiser

Peter Gaa

Klaus Fouquet

Elke Geiβler

Michael Salla

Elke Geiβbler

Elke Geißler

The invention relates to a shell-and-tube apparatus comprising a housing () having a bundle () of tubes accommodated therein, where the tubes () are joined on one side to a first tube plate () and on the side opposite the first tube plate () to a second tube plate (), with the first and second tube plates () being fastened detachably in the housing (). The side of the first tube plate () opposite the tubes () rests against a stop () on the housing () and is fixed on the stop () and the second tube plate () is installed with a sealing element () in the housing (). The invention further relates to the use of the shell-and-tube apparatus.

Tube bundle device and use thereof

Apparatus and processes for continuous distillative separation of a mixture comprising one or more alkanolamine(s) are described. The separation is performed in one or more dividing wall column(s) and the alkanolamine or the alkanolamines is/are withdrawn as a side draw stream or side draw streams (side fraction(s)).

Devices and method for continuous distillative separation of a mixture containing one or more alkanolamine(s)

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

A process for preparing an N,N-dialkylethanolamine of the formula I having high color stability where Rand Rare each independently a C- to C-alkyl group, by reacting ethylene oxide (EO) with a corresponding dialkylamine (RRNH) in the presence of water, wherein the reaction is effected continuously in a reactor, the reaction temperature is in the range from 90 to 180&#xb0; C. and the residence time (RT) in the reactor is in the range from 1 to 7 min, the reactor output is treated thermally at a temperature in the range from 80 to 160&#xb0; C. over a period in the range from 20 to 1000 min, and then the N,N-dialkylethanolamine is removed by distillation.

Process for preparing an N,N-dialky-ethanolamine having high color stability

Processes comprising: (a) reacting dimethylamine and ethylene oxide to form a product mixture comprising N,N-dimethylethanolamine and N,N-dimethylaminoethoxyethanol; (b) distilling the product mixture to obtain a bottom fraction comprising N,N-dimethylaminoethoxyethanol; and (c) distilling the bottom fraction to separate at least a portion of the N,N-dimethylaminoethoxyethanol from the bottom fraction; and apparatus for carrying out said processes.

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Apparatus and processes for continuous distillative separation of a mixture comprising one or more alkanolamine(s), wherein the separation is performed in one or more dividing wall column(s) and the alkanolamine or the alkanolamines is/are withdrawn as a side draw stream or side draw streams (side fraction(s)).

A method for depleting halide ions from liquid ammonia, which comprises bringing the liquid ammonia into contact with a strongly basic ion exchanger, where the basic structure of the strongly basic ion exchanger is a covalently crosslinked polymer matrix and the content of ammonia in the liquid ammonia is more than 98% by weight.

Method for removing halogen from liquid ammonia

Processes comprising: providing a mixture comprising monoethylene glycol and diethylenetriamine; and subjecting the mixture to extractive distillation with a diethylenetriamine-selective solvent comprising triethylene glycol to provide a first stream comprising monoethylene glycol and a second stream comprising diethylenetriamine; wherein the first stream is substantially free of diethylenetriamine, and wherein the second stream is substantially free of monoethylene glycol.

Process for the distillative separation of mixtures comprising monoethylene glycol and diethylentriamine

Processes comprising: providing an aromatic alcohol; and reacting the aromatic alcohol with ammonia at a temperature of 80 to 350&#xb0; C. in the presence of hydrogen and a heterogeneous catalyst to form a crude reaction product comprising a corresponding primary aromatic amine, wherein the heterogeneous catalyst comprises a catalytically active composition which, prior to reduction with hydrogen, comprises 90 to 99.8% by weight of zirconium dioxide (ZrO), 0.1 to 5.0% by weight of an oxygen-comprising compound of palladium, and 0.1 to 5.0% by weight of an oxygen-comprising compound of platinum.

Method for the continuous production of an amine

A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein the process is carried out in two process stages in which

Method for producing ethylene amines ethanol amines from monoethylene glycol (MEG)

A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein a catalyst having an active composition comprising ruthenium and cobalt and no further additional metal of group VIII and also no metal of group IB is used in the form of shaped catalyst bodies which in the case of a spherical shape or rod shape in each case have a diameter of &#x3c;3 mm, in the case of a pellet shape have a height of &#x3c;3 mm and in the case of all other geometries in each case have an equivalent diameter L=1/a' of &#x3c;0.70 mm, where a&#x2032; is the external surface area per unit volume (mm/mm) and: where Ais the external surface area of the shaped catalyst body (mm) and Vis the volume of the shaped catalyst body (mm), is proposed.

Method for producing ethylene amines and ethanol amines by the hydrogenating amination of monoethylene glycol and ammonia in the presence of a catalyst

A process for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone in the gas phase in the presence of a copper-containing catalyst, wherein the catalyst contains 4-40% by weight of copper and 0-5% by weight of Na.sub.2 O, based on the total weight of the catalyst, on a carrier consisting of 80-100% by weight of SiO.sub.2 and 0-20% by weight of CaO.

Catalyst for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone

The invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of a sodium-containing catalyst. In this process the polytetrahydrofuiran solution is passed in the presence of a catalytic amount of water directly through at least one ion exchanger following the transesterification in order to remove the sodium cations. The novel process makes it possible to remove the sodium cations from the sodium-containing catalyst in an economic manner and with little complexity. The residual sodium content can be reduced to values of less than 0.5 ppm.

Preparation of polytetrahydrofuran with terminal hydroxyl groups using

Dehydrogenation of 1,4-butanediol to .gamma.-butyrolactone

Preparation of aromatic or heteroaromatic nitrites of the formula I ##STR1## where X is nitrogen or C-R.sup.6 and all of the R substituents represent hydrogen, alkyl, halogen, nitro, amino or similar groups, provided at least one substituent is a cyano or alkylcyano group. The nitrites I are produced by reacting aromatic or heteroaromatic hydrocarbons of the formula II ##STR2## where X is nitrogen or C-R.sup.6, provided at least one substituent is C.sub.1 -C.sub.8 -alkyl, with ammonia and oxygen at 200 to 600.degree. C. under a pressure of 0.1 to 5 bar in the gas phase over a supported catalyst containing 0.5 to 20% by weight of vanadium oxide. The supported catalyst consists of from 2 to 30 particle fractions whose mean diameters differ by from 10 to 80% and the supporting carrier of the catalyst has a bulk density of 0.6 to 1.2 kg/liter.

Preparation of aromatic or heteroaromatic nitriles

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Kleinniedesheim, Germany

Frank-Friedrich Pape