Synthesis of cyclohexanone 1,2-propanediol ketal with H_3PW_(12)O_(40)/SiO_2 as catalyst

H3PW12O40/SiO2 catalyst was prepared by sol-gel method.The catalyst was characterized by infra red spectrum and X-ray diffraction pattern.By using this catalyst,cyclohexanone 1,2-propanediol ketal was synthesized with cyclohexanone and 1,2-propanediol as starting materials.Factors that influencing the synthesis,such as molar ratio of the starting materials,dosage of the catalyst and reaction time et al on the yield of the product were examined and the catalytic activity of the H3PW12O40/SiO2 catalyst was investigated.Experimental results showed that on the basis of 0.2 mol of cyclohexanone,when molar ratio of cyclohexanone to 1,2-propanediol is 1∶ 1.3,dosage of the catalyst is 1.3% of total mass of the starting materials,volume of cyclohexane as water stripping agent is 6 mL,and the reaction time is 45 min,yield of the product achieves 88.1%.