| 摘要 |
The present invention relates to an improved process for the production of methyl heptanone and corresponding homologous methyl ketones, in particular phytone and tetrahydrogeranyl acetone, by aldolisation of isovaleraldehyde or prenal or of the corresponding aldehydes with acetone in the presence of a polyhydric alcohol containing the aldolisation catalyst and the heterogeneous hydrogenation catalyst. The working-up of the two-phase reaction mixture is carried out by simple separation of the supernatant produce phase from the catalyst suspension containing the active hydrogenation catalyst, optionally with distillative removal of the water of reaction that is formed, and recycling of the active catalyst phase. |
