Basf Aktiengesellschaft

Basf Aktiengeselllschaft

Klaus Halbritter

Gerd Heilen

Walter Gramlich

Boris Breitscheidel

Klemens Massonne

Werner Aquila

Heinz Eckhardt

Karl Siegfried Brenner

Wolfgang Sauer

Ralf Noe

Jochem Henkelmann

Rolf Pinkos

Wolfgang Siegel

Hans-Josef Sterzel

Martin Fischer

Michael Bartsch

Wilhelm Ruppel

Ludwig Schuster

Matthias Maase

Rudolf Kropp

Manfred Eggersdorfer

Walter Rebafka

Veit Stegmann

Melanie Brunner

Hartwig Fuchs

Michael Becker

Lucien Thil

Oliver Huttenloch

Hans-Juergen Scheiper

Eva Freudenthaler

Miguel Flores

Rolf Hartmuth Fischer

Norbert Goetz

Klaus Ebel

Klaus Hahn

Hartmut Hibst

Gerd Kaibel

Wolfgang Harder

Wolfgang Rohr

Manfred Julius

Eckhard Hickmann

Michael Henningsen

Lothar Franz

Rainer Papp

Arnd B&ouml;ttcher

Heinz Engelbach

Heinz Weber

Frank Haese

Wolfgang Franzischka

Erhard Henkes

Matthias Eiermann

Christian Tragut

Horst Zimmermann

Hans-Juergen Gosch

Martin Volland

Otto Woerz

Eike Johannes Bergner

Arnd Böttcher

Herbert Mayr

Klaus-Dieter Malsch

Klaus Hinselmann

Axel Salden

Wolfgang Hoffmann

Melanie Maas-Brunner

Walter Best

Otto Worz

Verena Seitz

Wilhelm Striepe

Rudolf Pock

Wolf Stegmaier

Process for preparing aminodihalophosphines, diaminohalophosphines, triaminophosphines, phosphorous ester diamides, aminophosphines, diaminophosphines, phosphorous ester amide halides and aminophosphine halides with elimination of an acid in the presence of an auxiliary base, wherein the auxiliary base

Method for the separation of acids from chemical reaction mixtures by means of ionic fluids

A process for removing acids from reaction mixtures using an auxiliary base, in which the auxiliary base: combines with the acid to form a salt which is liquid at temperatures at which the product of value does not significantly decompose during the removal of the liquid salt, and the salt of the auxiliary base with the product of value or the solution of the product of value in a suitable solvent forms two immiscible liquid phases.

The invention relates to a process for preparing cyclohexanedicarboxylic acids or derivatives thereof, such as esters and/or anhydrides, encompassing the reaction of diene/maleic acid anhydride mixtures, in particular of butadiene/maleic acid anhydride mixtures or of mixtures of maleic acid anhydrides and C5-dienes to give alkyl-substituted or unsubstituted cyclohexenedicarboxylic acid anhydrides in the condensed phase, ester formation, and then hydrogenation to give the corresponding cyclohexanedicarboxylic acid derivative, and also to the use of the cyclohexanedicarboxylic acids or derivatives thereof prepared according to the invention as plasticizers for plastics.

Method for producing cyclohexane dicarboxylic acids and the derivatives thereof

A process for producing plasticizers in which a phthalic acid having the CAS Nos. 111381-89-6, 111381-90-9, 111381-91-0, 68515-44-6, 68515-45-7 and 3648-20-7, the formed plasticizers and a method of increasing the plasticity of a plastic product.

Hydrogenation of benzenepolycarboxylic acids or derivatives thereof using a catalyst containing macropores

Method for producing alkanesulfonic acids

Dimethyl sulfite is prepared by transesterification of a cyclic alkylene sulfite of at least 2 carbon atoms with methanol, in the presence or absence of a catalyst, by a process which is carried out continuously in a column.

Method of producing dimethyl sulfite

Method for hydrogenating benzene polycarboxylic acids or derivatives thereof by using a catalyst containing macropores

In the process for preparing acetylene and hydrocyanic acid by pyrolyzing acrylonitrile in a reactor, the gaseous reaction products of the pyrolysis are quenched down to less than 100.degree. C. immediately, advantageously within seconds, preferably within .ltoreq.1 s, of leaving the pyrolysis zone.

Coproduction of acetylene and hydrocyanic acid from acrylonitrile

A process for continuous industrial production of unsaturated aliphatic aldehydes having a boiling range from 95 to 136.degree. C. by oxidative dehydrogenation of the corresponding alcohols with an oxygen-comprising gas over a supported catalyst consisting of copper, silver and/or gold on an inert support in a tube bundle reactor, rapid cooling of the reaction gases and removal of the aldehydes from the resulting condensate with recycling of the unconverted alcohols comprises

Continuous industrial production of unsaturated aliphatic aldehydes in a

The invention relates to a process for preparing dialkyl malonates by ozonolysis of diketene, subsequent catalytic hydrogenation and esterification of the reaction products, the by-products being alkyl formates and dialkyl acetals.

Preparation of dialkyl malonates

In a tube bundle reactor for carrying out catalytic organic reactions in the gas phase, comprising reaction tubes (A) arranged between tubesheets (B), the reaction tubes have an inside diameter ranging from 0.5 to 3 cm, the ratio of reaction tube length to inside diameter ranges from 2 to 10, and the reaction tubes (A) are surrounded by a fluid heat transport medium flowing in the crosswise direction; said tube bundle reactor is useful in particular in exothermic organic reactions.

Tube bundle reactor, use thereof in exothermic organic reactions, and

Process for the preparation of 1,4-butanediol or tetrahydrofuran or both by the catalytic hydrogenation of maleic anhydride, succinic anhydride, maleic acid, succinic acid, fumaric acid, or the alkyl esters of these acids at temperatures of from 100.degree. C. to 350.degree. C. and pressures of from 50 bar to 350 bar over a catalyst containing cobalt as the active metal and one or both of the elements copper and phosphorus, if necessary in the presence of an aliphatic alcohol.

Preparation of 1,4-butanediol or tetrahydrofuran or both

4,4-Dimethyltetrahydrofuran-2,3-dione is prepared by reacting a dimethylpyruvate (II) with formaldehyde or a formaldehyde donor at 80.degree.-150.degree. C.

Preparation of 4,4-dimethyltetrahydrofuran-2,3-dione

.gamma.-butyrolactones of the general formula I ##STR1## where R.sup.1 is hydrogen or alkyl of 1 to 4 carbon atoms which may be substituted by lower alkoxy or acyloxy and R.sup.2 is hydrogen or straight-chain or branched alkyl which is unsubstituted or substituted by a functional group or is aryl, are prepared by reacting an alkylene oxide of the general formula II ##STR2## with an acylacetate of the general formla III ##STR3## where R.sup.1 and R.sup.2 have the above meanings and R.sup.3 and R.sup.4 are each alkyl of 1 to 6 carbon atoms or aryl, and R.sup.4 may furthermore be hydrogen, in the presence of a catalyst at elevated temperatures, by a process in which the reaction is carried out in the presence of an alkali metal halide, of an ammonium halide, preferably a quaternary ammonium halide, of a phosphonium halide, of an alkali metal phosphate or of an alkali metal carbonate at from 20.degree. to 200.degree. C. and under from 1 to 50 bar.

Preparation of alpha-substituted upsilon-butyrolactones

.beta.-Dicarbonyl and .beta.-cyanocarbonyl compounds ##STR1## where R.sup.1 is alkyl of 1-20 carbons, X is --COR.sup.2, Y is --COOR.sup.3, --COR.sup.3 or --CN, and R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.10 -alkyl, are prepared from R.sup.1 --CHO (II) and X--CH.sub.2 --Y (III) by reaction in the presence of a condensation catalyst, hydrogen and a hydrogenation catalyst, using an oxide or phosphate of Mg, Al, Ti, Zn or a rare earth metal as the condensation catalyst.

Preparation of .alpha.-substituted .beta.-dicarbonyl and

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Mannheim, Germany

Klaus Halbritter