Preparation of aldehydes
AssigneeBASF SE
InventorsClaudius Kormann, Heinz-Josef Kneuper
Life of this patent
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Abstract
Aldehydes and/or alcohols are prepared by the hydroformylation of olefins of more than 3 carbon atoms by means of a bare rhodium catalyst dissolved homogeneously in the reaction medium, at superatmospheric pressure and at elevated temperatures, and separation of the rhodium catalyst from the liquid reaction mixture, by a process in which a magnetizable, inorganic pigment coated with a polymeric binder is used for separating the homogeneously dissolved, bare rhodium catalyst from the hydroformylation medium, and this pigment, after it has been laden with the rhodium contained in the hydroformylation medium, is separated from the liquid hydroformylation medium by applying an external magnetic field.
Claims11
A process for the preparation of aldehydes or alcohols by the hydroformylation of olefins of more than 3 carbon atoms by means of a bare rhodium catalyst dissolved homogeneously in the reaction medium, at superatmospheric pressure and at elevated temperatures, and separation of the rhodium catalyst from the liquid reaction mixture, wherein a magnetizable, inorganic pigment coated with a polymeric binder is used for separating the homogeneously dissolved, bare rhodium catalyst from the hydroformylation medium, and this pigment, after it has been laden with the rhodium contained in the hydroformylation medium, is separated from the liquid hydroformylation medium by applying an external magnetic field.
A process for the preparation of aldehydes or alcohols by the hydroformylation of olefins of more than 3 carbon atoms by means of a bare rhodium catalyst dissolved homogeneously in the reaction medium, at superatmospheric pressure and at elevated temperatures, and separation of the rhodium catalyst from the reaction mixture, wherein the rhodium source used for producing the rhodium catalyst which is homogeneously soluble in the reaction medium is a magnetizable, inorganic pigment which is uncoated or coated with a polymeric binder and contains the rhodium in a reversibly complexed or adsorptively bound form under the conditions of the hydroformylation reaction, and, after the hydroformylation, the magnetizable pigment again laden with the rhodium is separated from the liquid hydroformylation medium by applying an external magnetic field.
Dependencies are inferred from the claim text.