Hoechst Aktiengesellschaft

Hans Krekeler

Friedrich Wunder

Werner H Muller

Hans-Joachim Schmidt

Hans Fernholz

Wilhelm Riemenschneider

Heinz Schmitz

Helmut Meidert

Knut Riedel

G/u/ Nter Roscher

Unsaturated esters of carboxylic acids are prepared by reacting olefines or cycloolefines with carboxylic acids and oxygen in the gaseous phase in the presence of a catalyst containing noble metal salts or noble metals of the VIII.sup.th group of the Periodic System and alcali metal salts and/or alcaline earth metal salts, as activators the content of noble metal being in the range of from 1.2 to 5% by weight and the proportion of the metal fraction of each individual activator to the noble metal content being in the range of from 0.5 to 1 to 3:1.

Process for the manufacture of unsaturated esters of carboxylic acids

The present invention is related to a process for the manufacture of resorcinols by catalytic dehydrogenation of cyclohexane diones-(1,3) in the liquid phase by means of a dehydrogenating mixture consisting of a solvent and of a catalyst containing a noble metal from Group VIII of the Periodic Table.

Process for the manufacture of resorcinol

Process for regenerating palladium carrier catalysts for the oxacylation of olefins in the gaseous phase by treating the exhausted catalyst with a fatty acid blended with nitric oxides, nitric acid, peroxides or per-acids, by subsequent drying at temperatures below 90.degree. C and evaporation of the fatty acid to a residual content of below 8 weight %.

Process for regenerating palladium catalysts

The present invention is related to a process for the manufacture of hydroquinone by catalytic dehydrogenation of cyclohexanedione-(1,4) in the liquid phase by means of a dehydrogenation mixture composed of a solvent and a catalyst comprising a noble metal of Group VIII of the periodical system.

Process for the manufacture of hydroquinone

A process for the preparation of a mixture of carbon tetrachloride and phosgene in the absence of a catalyst from

Growing community of inventors

Wiesbaden, Germany

Hans Krekeler