Evonik Operations Gmbh

Evonik Oxeno Gmbh & Co. Kg

Ana Markovic

Robert Franke

Dirk Fridag

Alexander Brächer

Peter Kucmierczyk

Johannes Knossalla

Anna Chiara Sale

Frank Geilen

Detlef Selent

Stefan Drees

Kerstin Romeike

Matthias Beller

Armin Matthias Rix

Armin Börner

Marc Schäpertöns

Frederik Gluth

Jens Holz

Benedikt Dercks

Ricarda Dühren

Christoph Kubis

Martin Oldemeyer

Amin Borner

Benedikt Dereks

Tonia Weber

Gudrun Wenzel

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

A process for preparing aldehydes by a homogeneously catalysed hydroformylation of Cto Colefins involves withdrawing a biphasic stream (liquid/gaseous) and expanding in two stages. Before, between, or after the two stages, the liquid phase is cooled. Only after expansion and cooling is the homogeneously dissolved rhodium catalyst system separated from the residual stream.

Process for preparing aldehydes and cooling a stream of matter

A process for preparing aldehydes by a homogeneously catalyzed hydroformylation of Cto Colefins involves withdrawing a biphasic stream (liquid/gaseous) and expanding in two stages. Before, between, or after the two stages, the liquid phase is cooled. Only after expansion and cooling is the homogeneously dissolved rhodium catalyst system separated from the residual stream in a three-stage removal.

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

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

Bisphosphite ligands based on benzopinacol

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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Haltern am See, Germany

Ana Markovic