Evonik Operations Gmbh

Evonik Oxeno Gmbh & Co. Kg

Anna Chiara Sale

Robert Franke

Dirk Fridag

Johannes Knossalla

Alexander Brächer

Peter Kucmierczyk

Ana Markovic

Detlef Selent

Armin Börner

Kerstin Romeike

Matthias Beller

Armin Matthias Rix

Frederik Gluth

Marc Schäpertöns

Jens Holz

Ricarda Dühren

Christoph Kubis

Amin Borner

Thomas Quell

Gudrun Wenzel

Maren Termühlen

Annika Reinhardt

Robert Francke

Process for alkoxycarbonylation of ethylenically unsaturated compounds using benzene-based diphosphine ligands and aluminium triflate.

Process for alkoxycarbonylation of ethylenically unsaturated compounds using benzene-based diphosphine ligands and aluminium triflate

A process for preparing Caldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.

Process for preparing Caldehydes

A process can be used for preparing aldehydes from C2 to C20 olefins with a subsequent thermal separation for removal of the aldehyde formed. The process involves a membrane separation, which is preceded by performance of a gas exchange by which the proportion of the partial pressure represented by carbon monoxide or hydrogen is increased in order to reduce catalyst losses.

Optimized thermal separation by prior gas exchange

Bisphosphite ligands based on benzopinacol with an open outer unit, and the use thereof in hydroformylation.

Bisphosphite ligands based on benzopinacol with an open outer unit

Diphosphites having an open, 2,4-methylated outer unit and use thereof in hydroformylation.

Diphosphites having an open, 2,4-methylated outer unit

Bisphosphite ligands based on benzopinacol, and the use thereof in hydroformylation.

Bisphosphite ligands based on benzopinacol

New diphosphites based on cis-butene-1,4-diol.

Diphosphites based on cis-butene-1,4-diol

Diphosphites having an open, 3-methylated outer unit and use thereof in hydroformylation.

Diphosphites with an open, 3-methylated outer unit

Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylation.

Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylation

Diphosphites having an open and a closed 2,4-methylated outer unit and use thereof in hydroformylation.

Diphosphites having an open and a closed 2,4-methylated outer unit

The present invention provides a process for preparing aldehydes from C2 to C20 olefins using a subsequent membrane separation to separate the homogeneously dissolved catalyst system, wherein prior to the membrane separation a gas exchange that increases the partial pressure fraction of carbon monoxide or hydrogen is carried out in order to boost catalyst retention by the membrane.

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Recklinghausen, Germany

Anna Chiara Sale