Catalytic synthesis of butyraldehyde glycol acetal with H_3PW_6Mo_6O_(40)/TiO_2

A new environmental friendly catalyst,H3PW6Mo6O40/TiO2 was prepared.The optimum conditions have been found,that is,mass ratio of m(TiO2): m(H3PW6Mo6O40) is 1/1.0,volume of water is 30mL,the soaked time is 12 h,and activated temperature is 150 ℃.H3PW6Mo6O40/TiO2 was used as catalyst in catalytic synthesis of butyraldehyde glycol acetal.Effects of n(benzaldehyde)∶n(glycol),catalyst dosage and reaction time on yield were investigated.Optimal conditions were: n(butyraldehyde)∶n(glycol)=1.0∶1.4;mass fraction of catalyst to reactants,0.8%;reaction time,1.5 h and cyclohexane as water-stripped reagent,8 mL.Under these conditions,yield of butyraldehyde glycol acetal was 51.3%.