Basf Aktiengesellschaft

Basfaktiengesellschaft

Bernhard Bockstiegel

Kai-Uwe Baldenius

Harald Laas

Manfred Stroezel

Paul Grafen

Heinz Etzrodt

Wulf Kaiser

Klaus Reimer

Hagen Jaedicke

Horst Hartmann

Carsten Oost

Wolfram Burst

Gerd Kaibel

Andreas Ansmann

Martin Jochen Klatt

Dietmar Weller

Lothar Laupichler

Thomas M&uuml;ller

Jochem Henkelmann

Alois Kindler

Walter Dobler

Mathias Haake

Bernhard Schulz

Susanne Stutz

Christian Tragut

Franz Josef Br&ouml;cker

Detlef Ruff

Ulrich Kammel

Peter Schmitt

Ulrich Hoercher

Helmut Glietenberg

Barbara Jessel

Carsten Siedenbiedel

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

A reflection column which contains liquid distributors having at least 500 drip points/m , which are arranged at an angle of about 90&deg; C. to cloth layers of packing elements located immediately therebelow; and a combination of insulation and protective heating. The column is advantageously used for the rectification of mixtures of high-boiling air- or temperature-sensitive substances requiring effective separation efficiency.

Rectification column for isolating pure substances from high boiling air-and/or temperature sensitive substances

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

The present invention relates to a process for preparing 3,5, 5-trimethylcyclohex -2-ene-1,4-dione (oxoisophorone; OIP) by oxidation of 3,5,5-trimethylcyclohex-3-en-1-one (&bgr;-isophorone, &bgr;-IP) with molecular oxygen in the presence of a solvent, of a base and of a manganese salen derivative as catalyst.

Process for preparing oxoisophorone

The present invention relates to a process for preparing 3,5,5-trimethylcyclohex-2-ene-1,4-dione (oxoisophorone; OIP) by oxidation of 3,5,5-trimethylcyclohex-3-en-1-one (&bgr;-isophorone, &bgr;-IP) with molecular oxygen in the presence of a solvent, of a base and of a transition metal salen derivative as catalyst and of an additive.

Process for preparing oxoisophorone using additives

Process for isolation of pure substances from mixtures of high-boiling

A process for preparing chromanol derivatives of the formula I ##STR1## where n is from 1 to 10,

Process for preparing chromanol derivatives

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

A process for preparing .alpha.-tocopherol or .alpha.-tocopheryl acetate by reacting 2,3,5-trimethylhydroquinone with isophytol or phytol in the presence of a zinc halide condensation catalyst and a proton donor in a solvent with or without subsequent esterification with acetic anhydride, which comprises

Preparation of .alpha.-tocopherol or .alpha.-tocopheryl acetate by

Cloth or cloth-like packing which is subject to low pressure losses and

2,3,5-Trimethyl-p-benzoquinone is prepared by oxidation of trimethylphenol with oxygen or an oxygen-containing gas in the presence of a catalyst containing a copper(II) halide in a two-phase reaction medium consisting of water and an aliphatic alcohol at elevated temperatures by a process in which the reaction is carried out in a mixture of water and a saturated aliphatic alcohol of 12 to 18 carbon atoms, having a flashpoint greater than 120.degree. C., such as 1-dodecanol, 1-tetradecanol, 1-hexadecanol or 1-octadecanol, in particular 1-dodecanol, and at from 60.degree. to 100.degree. C. Particularly good yields of TMQ are obtained if the reaction is carried out in the presence of a copper(II) halide, such as CuCl.sub.2 or CuBr.sub.2, and of an alkaline earth metal halide, in particular CaCl.sub.2 or MgCl.sub.2, or of an alkali metal halide, in particular LiCl or NaCl, as the catalyst system.

Preparation of 2,3,5-trimethyl-p-benzoquinone

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Römerberg, Germany

Bernhard Bockstiegel