Basf Aktiengesellschaft

Ulrich Kohler

Frank-Friedrich Pape

Michael Hesse

Andreas Henne

Detlef Kratz

Roman Dostalek

Joachim Simon

Cristina Freire Erdbrugger

Hans Jochen Mercker

Rainer Becker

Matthias Irgang

Heinz-Josef Kneuper

Joachim Wulff-Doring

Lothar Karrer

Peter Polanek

Peter Weidlich

Michael Hullmann

A process for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone in the gas phase in the presence of a copper-containing catalyst, wherein the catalyst contains 4-40% by weight of copper and 0-5% by weight of Na.sub.2 O, based on the total weight of the catalyst, on a carrier consisting of 80-100% by weight of SiO.sub.2 and 0-20% by weight of CaO.

Catalyst for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone

Dehydrogenation of 1,4-butanediol to .gamma.-butyrolactone

Supported catalysts which are suitable for ammonoxidation, comprising

Supported catalysts which are suitable for ammonoxidation

A process for the preparation of a phenyl amine which may be substituted by alkyl or cycloalkyl in which the corresponding cyolohexylamine is reduced at temperatures of 150.degree. to 300.degree. C. and pressures of 0.01 to 50 bar in the presence of a heterogeneous dehydrogenation catalyst consisting essentially of palladium or a palladium/platinum mixture supported on carrier consisting of the oxides of rare earth metals and and metals of Group IVb of the Periodic Table of Elements, with the proviso that the palladium/platinum mixture may also be supported on an alumina carrier. The cyclohexylamine reactant can be advantageously prepared by reacting the corresponding phenol with ammonia and hydrogen at 100.degree. to 250.degree. C. in the presence of the same heterogeneous catalyst as a preliminary step to provide a two stage process using the same catalyst in both stages.

Preparation of cyclic amines

Growing community of inventors

Mannheim, Germany

Ulrich Kohler