A process is described for preparing tetrahydrogeranylacetone in which
pseudoionone, geranylacetone and/or dihydrogeranylacetone in a liquid
phase, in which particles of a catalyst which is capable of
preferentially hydrogenating carbon-carbon double bonds over
carbon-oxygen double bonds are suspended, is conducted through a device
which inhibits the transport of the catalyst particles in the presence of
a hydrogen-containing gas.