| abstract |
The invention relates to a method for producing a product mixture ( 2 ) by means of the technical hydroformylation of a hydrocarbon stream ( 1 ) that contains isobutene, and for separating the product mixture ( 2 ) that is obtained, as well as to a device for the claimed method and to the use of a claimed device. The problem addressed thereby is that of providing a method and an associated device that allow the amount of high-boiling substances in the product mixture ( 2 ) to be kept as low as possible and thus the yield of the reaction to be increased. The problem is solved by the use of a nano-filtration device (M) for separating the catalyst from the product mixture ( 2 ), said device having especially high permeability to 3-methylbutanoic acid. |