A method for the production of tiglic aldehyde.

摘要

Ethylacrolein is isomerized in the presence of a hydrogenation catalyst, e.g. a group VIII metal, e.g. Pt, Pd, Rh or Ru at a temperature of below 300 DEG C, or Si, Al or Si-Al at 200-400 DEG C, optionally in the presence of hydrogen gas.
<??>In the liquid phase a solvent is present, e.g. an aromatic hydrocarbon; or in the gaseous phase any inert gas is present, with a fixed or fluidized bed. Both methods give good yields of up to 75% of tiglic aldehyde. The catalyst is separated and reused.
<??>The ethylacrolein is prepared by condensing n-butylaldehyde and aqueous formaldehyde solution.