Basf Aktiengesellschaft

Ernest Miesen

Franz Merger

Franz J Broecker

Leopold Hupfer

Juergen Paetsch

Wolfgang Schroeder

Karl Baer

Gerhard Nestler

Matthias Schwarzmann

Heinz Eilingsfeld

Matthias Irgang

Gerald Vorberg

Peter Stops

Gerd Duembgen

Volkmar Menger

Friedrich Wirth

Johannes E Schmidt

Fritz Graf

Eckehard Danz

Guenter Zirker

Helmut Glietenberg

Wolfgang Jürgen Pöpel

Theodor Jacobsen

Gerd Dumbgen

Catalysts for the purification of ethylene containing copper and zinc, optionally one or more promoters or supports. These catalysts are produced by precipitation, drying, calcination and compression, optionally with the addition of additives, the compressed catalyst particles are calcinated at a temperature between from 300 to 700&#xb0; C.

Catalysts containing copper and zinc for the purification of ethylene

Process and catalyst for the selective hydrogenation of butynediol to

A process for the continuous isolation of phthalic anhydride and maleic anhydride from the reaction gases obtained by catalytic oxidation of o-xylene or naphthalene with air, wherein the reaction gases are treated with a hydrocarbon of boiling range from 115.degree. to 175.degree. C. as the solvent in a column, and are then treated with an organic solvent of boiling range from 180.degree. to 290.degree. C. in a second column, the phthalic anhydride and maleic anhydride being isolated from the liquid bottom product of the first column.

Continuous isolation of phthalic anhydride and maleic anhydride from

Hydrogenation catalysts which are prepared from mixed crystals of copper-zinc compounds, obtained by precipitation, of the formula

Preparation of propanediols using a copper-and zinc containing

Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts. The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.

Hydrogenation catalysts for the preparation of propanediols

Hydrogenation catalysts for the preparation of propanediols and

.gamma.-Butyrolactone is manufactured by hydrogenating maleic anhydride in the presence of butyrolactone as the solvent. The hydrogenated reaction mixture, which contains butyrolactone, succinic anhydride and succinic acid, is fractionated in a thin film evaporator.

Manufacture of .gamma.-butyrolactone from maleic anhydride

Anthraquinones are manufactured by cyclizing o-benzoylbenzoic acids in the presence of oxygen-containing compounds of aluminum and silicon at elevated temperatures. The products are starting materials for the manufacture of dyes.

Manufacture of anthraquinones

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Ludwigshafen, Germany

Ernest Miesen