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Dehydrogenation and oxidative dehydrogenation of six different primary and secondary, aliphatic and aromatic alcohols to the corresponding carbonyl compounds were studied in cyclohexane, in the presence and absence of air. The reaction network was examined by attenuated total reflection infrared (ATR-IR) spectroscopy of the catalytic solid–liquid interface and by GC analysis of the effluent in a continuous-flow...
“Supercritical” (dense) carbon dioxide has been applied as solvent for the partial oxidation of benzyl alcohol with molecular oxygen in a fixed-bed reactor. High rate and good selectivity to benzaldehyde (93–97%) has been achieved with 0.5 wt% Pd/alumina or 0.5 wt% Pd/C, at around 100 ○C and 100 bar, using only moderate excess of oxygen. The by-product benzoic acid has an autocatalytic effect on the...
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