Basf Aktiengesellschaft

Basf Aktiengeselllschaft

Werner Aquila

Gerd Kaibel

Hartwig Fuchs

Klaus Halbritter

Walter Dobler

Wolfgang Krause

Klaus Breuer

Christian Miller

J&ouml;rg Therre

Thomas Dirnsteiner

Wolfgang Siegel

Hardo Siegel

Werner Hoffmann

Walter Himmele

Klemens Flick

Wilhelm Ruppel

Alois Kindler

Manfred Stroezel

Udo Rheude

Axel Nissen

Klaus Pandl

Walter Rebafka

Matthias Kiefer

Melanie Brunner

J&ouml;rg Botzem

Karl Siegfried Brenner

Franz Josef Br&ouml;cker

Ernst Langguth

Melanie Pahl

Ulrich Sch&auml;fer-L&uuml;derssen

Achim Pommer

G&uuml;nter Wegner

Joachim Paust

Maximilian Vicari

Franz J Broecker

Hans-Georg Goebbel

Werner Fliege

Franz Josef Brocker

Michael Horner

Heinz Etzrodt

Wolfgang Sauer

Otto Woerz

Hans-Ulrich Scholz

Hans-Juergen Scheiper

Wolfgang Hoffmann

Guenter Wegner

Katrin Klass

Thilo Hahn

Otto Worz

Ulrich Sch{umlaut Over (a)}fer-L{umlaut Over (u)}derssen

Ulrich Schafer-Luderssen

Roland Pox

J&ouml;rg Niekerken

Katrin Klaβ

A process is described for preparing tetrahydrogeranylacetone in which pseudoionone, geranylacetone and/or dihydrogeranylacetone in a liquid phase, in which particles of a catalyst which is capable of preferentially hydrogenating carbon-carbon double bonds over carbon-oxygen double bonds are suspended, is conducted through a device which inhibits the transport of the catalyst particles in the presence of a hydrogen-containing gas.

Method for the production of tetrahydrogeranylacetone

A dividing-wall column having a dividing wall which is essentially disposed along the long direction of the column is proposed, which divides the column interior into a feed part, a take off part, an upper shared column part and a lower shared column part, with feed in whole or in part in the vaporous state of a mixture to be separated between the upper region of the feed part and the lower region of the feed part and/or side stream take off in whole or in part in the vaporous state between the upper region of the take off part and the lower region of the take off part, where if feed is in whole or in part in the vaporous state the cross-sectional area of the upper region of the feed part is increased by plane-parallel displacement of the dividing wall toward the upper region of the take off part, and/or if the side stream take off is in whole or in part in the vaporous state, the cross-sectional area of the lower region of the take off part is increased by displacement of the dividing wall toward the lower region of the feed part, in such a manner that the F factor is substantially the same in all column regions.

Dividing-wall column with feed in whole or in part in the vaporous state and/or side stream take off in whole or in part in the vaporous state

A process is proposed for preparing C acetate for Vitamin A synthesis by hydroformylation of 3,4-diacetoxybut-1-ene (3,4-DABE), according to which a 3,4-DABE is used which is obtained by acetoxylation of 1,3-butadiene with acetic acid and air in the presence of a catalyst and removing by distillation the 3,4-DABE formed in this case as by-product.

Process for preparing C5 acetate

The present invention relates to a continuous process for the preparation of unsaturated acetals by reacting olefinically unsaturated aliphatic compounds with allyl alcohols in a reaction column, where the reactants are only partially reacted in the reaction column, the resulting acetal is concentrated in at least two successive evaporation stages, and the recovered reactants are returned to the reaction column.

Continuous process for the preparation of acetals

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

The process for the preparation of carbonyl compounds of the formula I

Process for the preparation of &agr;-diketones from ketols or ketals from ketols

Catalyst and process for preparing 2-buten-1-ol compounds

Continuous preparation of dimethylvinylcarbinol by isomerizing prenol

3,7-Dimethyl-2,6-octadien-1-al of formula I is prepared continuously by:

Preparation of citral

A process for the preparation of acetates of alcohols or phenols, in particular linalyl acetate, by causing alcohols or phenols to react with ketene in the presence of a catalyst, wherein the reaction is carried out using approximately equimolar amounts of linalool and ketene in the presence of a zinc salt of a carboxylic acid, or alternatively in the presence of a zinc compound which forms zinc acetate under the conditions of the reaction, and with vigorous mixing of the reaction mixture. Using this process, linalyl acetate and numerous other acetates interesting as perfumes or active agents can be obtained to a good degree of purity in yields of more than 90% of theory and in very good space-time yields.

Preparation of acetates of hydroxyl group-containing organics, in

The invention relates to a process for the selective liquid-phase hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds of the formula I, ##STR1## where R.sub.1 is hydrogen or an organic radical, and R.sub.2, R.sub.3 and R.sub.4, independently of one another, are hydrogen or a C.sub.1 -- to C.sub.4 --alkyl group, to saturated carbonyl compounds of the formula II ##STR2## using hydrogen in the presence of a pulverulent palladium and/or rhodium catalyst and in the presence of an organic base. The process is carried out in a packed bubble column reactor (1, 2) with product recycling (11, 17) and circulating hydrogen gas (4, 15, 16). It is particularly suitable for the selective hydrogenation of citral to citronellal.

Selective liquid-phase hydrogenation of .alpha.,.beta.-unsaturated

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

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Mannheim, Germany

Werner Aquila