PROCESS FOR PREPARING ALDEHYDES AND SEPARATION OF THE CATALYST SYSTEM BY MEMBRANE SEPARATION

Japanese Patent JP2022027550

A

To provide a process for preparing aldehydes in which the catalyst losses during separation of the homogeneously dissolved catalyst system by membrane separation are decreased compared to known processes.SOLUTION: A process for preparing aldehydes is provided, comprising at least the following steps: a hydroformylation through the reaction of C2 to C20 olefins with syngas in the presence of a homogeneously dissolved catalyst system that comprises at least Co or Rh, in at least one reaction zone, yielding a liquid reaction output containing the product, wherein the partial pressure fraction of CO or H2 in the hydroformylation constitutes not more than 75% of the total gas pressure, the total gas pressure being the sum of the pressures occurring from all the gaseous substances present; and a membrane separation for separating the homogeneously dissolved catalyst system, wherein, before the membrane separation, a gas exchange with CO or H2 is carried out, as a result of which the partial pressure fraction of CO or H2 constitutes more than 80% of the total gas pressure.SELECTED DRAWING: None

JPS5283311	PREPARATION OF ALDEHYDES
WO/2015/054212	INTEGRATED PROCESS FOR CONVERTING METHANE TO AROMATICS AND OTHER CHEMICALS
JP2602707	INDUSTRIAL APPLICABILITY: Method for recovering rhodium from hydroformylation reaction product

ALEXANDER BRAECHER
JOHANNES KNOSSALLA
DIRK FRIDAG
ROBERT FRANKE
FREDERIK GLUTH
MARC SCHAEPERTOENS
CHRISTOPH KUBIS
ANNA CHIARA SALE
PETER KUCMIERCZYK
ANA MARKOVIC

JP2021120945A

February 10, 2022

July 21, 2021

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EVONIK OPERATIONS GMBH

C07C45/50; B01D69/02; B01D71/32; B01D71/52; B01D71/62; B01D71/64; B01D71/70; B01J31/24; B01J38/00; C07C47/02; C07C47/058

Tadashige Ito
Tadahiko Ito
Osamu Miyazaki

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