To profitably obtain the subject aldehyde in a good yield by subjecting an unsaturated aliphatic alcohol and an oxygen-containing gas to an oxidative dehydrogenation reaction in a bundle reactor.
This method for continuously and industrially producing an aldehyde of formula II comprises passing an oxygen-containing alcohol vapor comprising the vapor of a 3-alkyl-buten-1-ol of formula I (R1 is H; R2 is isoprenal, or R1 and R2 together forms a prenal group) and an oxygen-containing gas through a silver-carried catalyst layer having a thickness of at least 0.5 cm at a temperature which is higher than the dew point of the alcohol but lower than a reaction-starting temperature, bringing the passed vapor into contact with a silver-carried catalyst in parallel plural reaction pipes each having an inner diameter of about 0.5-3 cm and a length of at least 5 cm and heated with a liquid thermal medium flowing around the reaction pipes at 300-600°C to subject the vapor to an oxidative dehydrogenation reaction, immediately cooling the reaction gas and subsequently separating the aldehyde of formula II from the obtained condensed product.
FUCHS HARTWIG
WOERZ OTTO DR
RUPPEL WILHELM DR
HALBRITTER KLAUS DR
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