Basf Se Corporation

Basf Aktiengesellschaft

Gabriele Iffland

Alexander Weck

Johann-Peter Melder

Wolfgang Siegel

Ulrich Müller

Gerhard Nestler

Andrei-Nicolae Parvulescu

Toni Dockner

Thomas Krug

Heinrich Aichinger

Holger Herbst

Sebastian Ahrens

Stephan Freyer

Laszlo Szarvas

Mathias Feyen

Albrecht Dams

Bianca Seelig

Herbert Exner

Jens Wittenberg

Suman Thotla

Bernd Bastian Schaack

Dirk Gerhard

Sunghee Son

Stefanie Demming

J&uuml;rgen Ciprian

Yvonne Hoelzl

Ulrich Mueller

Hermann Luyken

Martin Ernst

Bilge Yilmaz

Christof Wilhelm Wigbers

Ulrich Berens

Matthias Frauenkron

Frank Stein

Lothar Franz

Heinz Auer

Frank-Friedrich Pape

Simon Schroedle

Ralf Boehling

Wolfgang Franzischka

Erhard Henkes

Vijay Narayanan Swaminathan

Roland Bou Chedid

Willi Schmidt

Hans-Heinrich Bechtolsheimer

Christian Gruenanger

Werner Weinle

Ellen Dahlhoff

Jürgen Ciprian

J&uuml;rgen Mohr

Giovanni D'Andola

Falk Simon

Peter Raatz

Martin Gall

Matthias Geisendorfer

Till Christian Brueggemann

Peter Dransfeld

Stefan Martin

Jian Zhong Yi

Zeljko Kotanjac

Christian Brueggemann

Hans-Martin Mugrauer

Joachim Bader

Armin Brucker

Hans Klink

Till Christian BRÜGGEMANN

Simon SCHRÖDLE

Ralf BÖHLING

A process for continuous production of C-C-monoalkanolamines by reaction of a corresponding C-C-alkylene oxide with a molar excess of ammonia (NH), wherein aqueous ammonia is employed, in the liquid phase and in the presence of an acidic cation exchanger as catalyst which contains a crosslinked copolymer comprising acidic functional groups as the carrier matrix, wherein the cation exchanger has a total exchange capacity of not less than 1.8 eq/L.

Method for producing C-Cmono alkanol amines using an acid cation exchanger as a catalyst

The present invention relates to a process for the preparation of a zeolitic material comprising the steps of:

Zeolitic materials and methods for their preparation using alkenyltrialkylammonium compounds

The invention relates to a process for continuously preparing di-C-alkyl succinates by reacting succinic acid with an C-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100&#xb0; C., wherein a mixture, comprising succinic acid, C-alkanol, mono-C-alkyl succinate, di-C-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C-alkanol to succinic acid added to the mixing zone, and not including the C-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C-alkanol and water are removed in a top draw of the column, di-C-alkyl succinate is removed in a side draw of the column, and wherein mono-C-alkyl succinate and succinic acid are removed in a bottom draw of the column.

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The invention relates to a process for continuously preparing di-C-alkyl succinates by reacting succinic acid with an C-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100&#xb0; C., wherein a mixture, comprising succinic acid, C-alkanol, mono-C-alkyl succinate, di-C-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C-alkanol to succinic acid added to the mixing zone, and not including the C-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C-alkanol to give di-C-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C-alkanol and water are removed in a top draw of the column, di-C-alkyl succinate is removed in a side draw of the column, and wherein mono-C-alkyl succinate and succinic acid are removed in a bottom draw of the column.

The present invention relates to a process for the preparation of a zeolitic material having a structure comprising YOand optionally comprising XO, preferably comprising YOand XO, wherein said process comprises the steps of

Synthesis of zeolitic materials using N,N-dimethyl organotemplates

Process for preparing an aqueous cobalt sulfate solution having a pH in the range from 5 to 8, wherein

Process for preparing aqueous solutions of cobalt sulfate

The present invention relates to a process for preparing 1-adamantyltrimethylammonium hydroxide, by A) reacting 1-adamantyldimethylamine with dimethyl sulfate to give 1-adamantyltrimethylammonium sulfate; and B) subjecting the 1-adamantyltrimethylammonium sulfate obtained in A) to anion exchange with an ion exchanger loaded with OH ions.

Method for producing 1-adamantyl trimethylammonium hydroxide

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

Method for separating alkali metal ions from alkoxylates

The present 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 an alkali metal- or alkaline earth metal-containing catalyst, which entails the appropriate acyloxy-containing polymer being introduced together with the alcohol and the catalyst into a first prereactor (I) and converted therein at least partly to the hydroxyl-containing polymer, and the reaction solution being fed into the upper zone (IIa) of a distillation column (II) into whose lower zone (IIb) alcohol in vapor phase is additionally fed. This involves a phase exchange at the coherent and the disperse phase at the transition from the prereactor to the distillation column. Preferably, in addition to the first prereactor, a further 3 prereactors are used which serve as holdup reactors.

Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase

Method for producing hexanediol-1,6

A process for reducing the amine content of amine-contaminated N-substituted lactams comprises treating the contaminated N-substituted lactams with an acid macroporous cation exchanger.

Purification of N-substituted lactams

In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with alkanols having from 1 to 5 carbon atoms in a homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acid esterification catalyst, in which the (meth)acrylic acid, the alkanol and the catalyst are fed to a reaction zone, the water formed is removed by rectification during a residence time as constituent of a mixture comprising alkanol in a rectification unit superposed on the reaction zone, the distillate thus obtained is separated into an organic phase comprising alkanol and an aqueous phase comprising water, the organic phase is returned to the rectification unit, the reaction mixture is discharged from the reaction zone and conveyed into a distillative separation zone comprising further rectification units and in the latter the alkyl (meth)acrylate formed is separated off.

Continuous preparation of alkyl esters of (meth) acrylic acid

In the process for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with monohydric alkanols having from 1 to 8 carbon atoms in the presence of an acid esterification catalyst in a reaction zone, there is discharged from the reaction zone a product mixture which comprises the alkyl (meth)acrylate formed, the catalyst and the by-products formed during the course of the esterification having boiling points higher than that of the alkyl (meth)acrylate, and from which the alkyl (meth)acrylate is separated by distillation in a separation zone. The product mixture discharged from the reaction zone is fed to a rectification unit (I), in this unit the product mixture discharged is separated by rectification into at least one product (I) comprising the alkyl ester of (meth)acrylic acid and a product (II) comprising the catalyst, the product (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated off by rectification.

Continuous preparation of alkyl esters of (meth)acrylic acid

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Heidelberg, Germany

Gabriele Iffland