78247-20-8Relevant academic research and scientific papers
Pd/AlPO4 CATALYSED SELECTIVE LIQUID-PHASE HYDROGENATION OF β-IONONE INTO CIS-DIHYDROIONONE
Bouchry, Naima,Aune, Jean-Pierre,Rais, Taoufiq
, p. 439 - 448 (2007/10/02)
The liquid-phase hydrogenation of β-ionone 1 was carried out at 302 K with 0.205 MPa of initial hydrogen pressure in methanol on Pd/AlPO4 catalyst (2-3 percent).The cis-dihydroionone 2 was obtained with a 83 percent selectivity which is independent of the degree of conversion.The reaction rate depends on the chloride concentration in the catalyst and the rection selectivity is a function of the support of the Pd.According to the Langmuir-Hinshelwood kinetic models and the Horiuti-Polanyi type mechanism, the reaction order with respect to β-ionone concentration is negative and of one half order with respect to the hydrogen pressure.The comparison with results obtained over Pd/C catalyst and those obtained in the catalytic hydrogenation of α-ionone suggests that the catalytic hydrogenation of β-ionone could take place on two different active sites of the Pd.
