Basf Aktiengesellschaft

Klaus Reimer

Manfred Stroezel

Bernhard Bockstiegel

Heinz Etzrodt

Carsten Oost

Gerd Kaibel

Andreas Ansmann

Hagen Jaedicke

Dietmar Weller

Lothar Laupichler

Jochem Henkelmann

Walter Dobler

Alois Kindler

Mathias Haake

Susanne Stutz

Christian Tragut

Franz Josef Br&ouml;cker

Ulrich Kammel

Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH /KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetates diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.

Preparation of higher &agr;, &bgr;-unsaturated alcohols

Preparation of C10-C30-alkenes by partial hydrogenation of alkynes over fixed-bed supported palladium catalysts

Process for the continuous preparation of unsaturated ketones of the formula I

Continuous preparation of unsaturated ketones

A process for preparing .gamma.,.delta.-unsaturated ketones of the general formula I ##STR1## by reacting an allyl alcohol of the general formula II ##STR2## in which R.sup.1 is H or a hydrocarbon radical having 1 to 20 carbon atoms, with diketene or an alkyl acetoacetate of the general formula III ##STR3## in which R.sup.2 is alkyl having 1 to 4 carbon atoms in an unmodified or modified Carroll reaction in the presence of an aluminum catalyst, wherein aluminum compounds which are stable liquids at room temperature, or a mixture of such aluminum compounds, which comprise at least one radical formed from an alkyl acetoacetate and 1 or 2 alkoxy radicals, or else comprise exclusively radicals formed from alkyl acetoacetates, which are esterified with sec-butanol or isobutanol, or else are esterified with at least two different alcohols, are used as aluminum catalyst. Also claimed are the novel mixtures of aluminum compounds which comprise radicals which are formed exclusively from alkyl acetoacetates and are esterified with at least two different alkanols, and the batchwise and continuous preparation of the liquid aluminum catalysts.

Preparation of .gamma.,.delta.-unsaturated ketones by the Carroll

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Mutterstadt, Germany

Klaus Reimer