high yields

selective oxidation

oxidative dehydrogenation

citations number articles

oxidation

molar ratio

Journal of Molecular Catalysis A Chemical

V 2 O 5 /Al 2 O 3  exhibits the high selectivity to partial oxidation compounds (cyclohexanol and cyclohexanone) as compared with TiO 2  in the photo-oxidation of cyclohexane in the liquid phase. This reaction is an environmentally friendly reaction since it proceeds at ambient temperature and atmospheric pressure without a solvent. The features of the reaction are a high selectivity to partial oxidation products and a reasonable ketone/alcohol ratio (K/A ratio). However, by elongation of the photoirradiation time, cyclohexyl hexanoate as a by-product was generated and the K/A ratio decreased gradually. Retention of the high O 2  concentration in the gas phase and irradiation of light  λ >330 nm are keys to the selective formation of the partial oxidation compounds with a reasonable K/A ratio in the photo-oxidation of cyclohexane over V 2 O 5 /Al 2 O 3 . In the present study, a selectivity of 87% to the partial oxidation compounds was achieved with the K/A ratio of 3.8.

Selective photo-oxidation of neat cyclohexane in the liquid phase over V2O5/Al2O3