Catalytic Synthesis of Cyclohexanone Ethylene Ketal with H_3PW_6Mo_6O_(40)/TiO_2

A new environmental friendly catalyst, H3PW6Mo6O40/TiO2 was prepared. The optimum conditions are found. That is, mass ratio of m(TiO2)∶m(H3PW6Mo6O40) is 1∶2.0, volume of water is 30 mL,the reflux reaction time is 2 h,and activated temperature is 150℃. H3PW6Mo6O40/TiO2 was used as the catalyst in the synthesis of cyclohexanone ethylene ketal. The effects of varying the n(cyclohexanone)∶n(glycol) ratio, catalyst dosage and reaction time on the yield were investigated. The optimal conditions were found to be: n(cyclohexanone)∶n(glycol)=1∶1.5; mass fraction of catalyst to reactants, 0.8%; reaction time, 1.0 h and dried cyclohexane, 8 mL. Under these conditions, the yield of cyclohexanone ethylene ketal was 86.3%.