Separation of a dissolved metal complex catalyst, preferably rhodium complex catalyst, comprises passing hydroformylating reaction mixture over a membrane, which is more permeable for hydroformylating product than organophosphorous ligand

摘要

Separation of a dissolved complex catalyst containing metal from group IV-X and an organophosphorous ligand, from a non-aqueous hydroformylating reaction mixture containing a hydroformylating product and an organic solvent, comprises passing the hydroformylating reaction mixture over a membrane, which is more permeable for the hydroformylating product than for the organophosphorous ligand, at a carbon monoxide partial pressure of at least 200 kPa, at the membrane -supply and -discharge as well as in the permeate.