Huels Aktiengesellschaft

Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Evonik Degussa Gmbh

Hans-Gerd Lüken

Dirk Fridag

Alfred Kaizik

Dietrich Maschmeyer

Michael Grass

Klaus-Diether Wiese

Markus Winterberg

Wilhelm Droste

Thomas Quandt

Markus Priske

Wilfried Büschken

Uwe Ernst

Udo Lenz

Bernd Nowitzki

Joachim Schuler

Hermann-Josef Schulte-Althoff

Martin Rupp

Patrick Muhlack

Frank Höper

Heinz Bolz

Wolfgang Baldauf

Stefan Drees

Götz Baumgarten

Norbert Scholz

Michael Graß

The invention relates to a method for separating and partially returning transition metals and/or catalytically effective complex compounds thereof from a reaction mixture by combining one at least one-stage membrane separation and an adsorption, wherein a current comprising a catalyst, comprising a transition metal, is divided over at least one one-stage membrane separation step in a transition metal enriched retentate stream that resupplies the reaction mixture and a transition metal depleted permeate stream and the transition metal depleted permeate stream is further supplied to an adsorption step. The invention further relates to a method for producing tridecanals.

Method for separation and partial return of rhodium and catalytically effective complex compounds thereof from process streams

A hydrogenation catalyst is used for the catalytic hydrogenation of an ester-containing aldehyde mixture and the catalyst contains a &#x3b3;-alumina having a BET surface area of from 70 to 350 m/g as support material, and at least one component having hydrogenation activity and being selected from the group consisting of nickel, cobalt and mixtures thereof.

Process for the hydrogenation of oxo aldehydes having high ester contents

A nickel/aluminum oxide catalyst having a nickel content from 10 to 60% by weight, based on the total catalyst, in which the nickel is in the form of crystallites having an average diameter ranging from 15 nm to 50 nm.

Nickel/aluminum oxide catalyst, preparation thereof, use thereof and

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Marl, Germany

Hans-Gerd Lüken