Direct vapor phase oxidation of propylene by molecular oxygen over MCM-41 or MCM-22 based catalysts

Ti and Al containing MCM-41 (Al-c-MCM-41 and Al-Ti-c-MCM-41) have been synthesized and tested for direct oxidation of propylene with molecular oxygen. Al-Ti-c-MCM-41 is more effective than Al-c-MCM-41, while no product was formed for MCM-41 alone. It is also found that MCM-22 with Si/Al2 ratio of 30 and Na/SiO2 ratio of 0.18 is active for the reaction and a highest PO yield of 11.3% was obtained at 573 K. [Copyright &y& Elsevier]