Basf Aktiengesellschaft

Peter R Laurer

Herwig Hoffmann

Wolfgang Schroeder

Heinz Lingk

Matthias Irgang

Axel Nissen

Michael Horner

Eckehard Danz

Gerd Krome

Heinrich Pasedach

Luc Cordemans

Reinhard Seifert

A supported catalyst containing copper and alkali metals, wherein the content of copper is from 1.0 to 12% by weight, based on total catalyst and expressed as metal, and the total content of the alkali metals potassium, lithium and sodium is from 0.3 to 9% by weight, based on total catalyst. The novel catalyst is useful for the preparation of 1,2-dichloroethane by oxychlorination of ethylene.

Supported catalyst containing copper and alkali metals

A process for the preparation of a very hard catalyst carrier from a mixture of aluminum oxides which in addition to .alpha.-Al.sub.2 O.sub.3 contains other modifications, preferably .gamma.-Al.sub.2 O.sub.3. The .alpha.-Al.sub.2 O.sub.3 is first pretreated with an acid, base and/or metal salt solution and is then mixed with the other aluminum oxides or their intermediates.

Preparation of a catalyst carrier from alumina mixtures

Carbonyl compounds R.sup.1 --CHR.sup.2 --CHR.sup.3 --CR.sup.4 O (I, R.sup.1 =H or an organic radical; R.sup.2 -R.sup.4 =H or C.sub.1 -C.sub.4 -alkyl) are prepared by selective hydrogenation of the .alpha.,.beta.-unsaturated carbonyl compounds R.sup.1 --CR.sup.2 =CR.sup.3 --CR.sup.4 O (II) in the liquid phase by means of hydrogen in the presence of a palladium catalyst and of from 15 to 50% by weight, based on (II), of a tertiary amine.

Preparation of carbonyl compounds

Basic carbonate which contains copper and aluminum and is suitable for the manufacture of copper-containing catalysts and which has the general formula Cu.sub.m Al.sub.6 (CO.sub.3).sub.0.5m O.sub.3 (OH).sub.m+12, where m may be an integer or non-integer between 2 and 6.

Butynediol manufacture

Basic carbonate which contains copper and aluminum and is suitable for the manufacture of copper-containing catalysts and which has the general formula Cu.sub.m Al.sub.6 (CO.sub.3).sub.0.5m O.sub.3 (OH).sub.m.sub.+12, where m may be an integer or non-integer between 2 and 6.

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Ludwigshafen, Germany

Peter R Laurer