Evonik Degussa Gmbh

Merck Patent Gmbh

Sartorius Stedim Biotech Gmbh

Evonik Oxeno Gmbh & Co. Kg

Andrzej Górak

Robert Franke

Michael Schulte

Wolfgang Demmer

Markus Priske

Bart Hamers

Peter Kreis

Annebart Engbert Wentink

William-Robert Pitner

René Faber

Patrick Schmidt

Peter Van Beijeren Bergen En Henegouwen

Constantin Frerick

Francesca Santangelo

The invention relates to a process for separating a composition of matter with the aid of a membrane cascade having at least two stages, in which a separation is effected in each stage at at least one membrane at a separation temperature set for the particular stage. The invention further relates to a corresponding membrane cascade, to the use of said membrane cascade for catalyst separation from homogeneously catalyzed mixtures, and to a process for hydroformylation, in which the catalyst is separated by means of a membrane cascade. The problem addressed thereby is that of specifying a membrane-based process for separating compositions of matter, which has a minimum membrane area requirement and nevertheless fulfills the separation task and separation performance required. This problem is solved by the use of a membrane cascade with falling separation temperature.

Membrane cascade with falling separation temperature

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Witten, Germany

Andrzej Górak