Catalytic synthesis of cyclohexanone 1,2- propanediol ketal by H_6P_2W_(18)O_(62)/SiO_2

Cyclohexanone 1,2- propanediol ketal was synthesized from cyclohexanone and 1,2- propanediol in the presence of H6P2W18O62/SiO2 as catalyst. The factors influencing the synthesis were discussed and the best reaction conditions were found out. Experimental results showed that H6P2W18O62/SiO2 was an excellent catalyst. The optimum conditions are: molar ratio of cyclohexanone to 1,2- propanediol is 1∶ 1. 5,the volume of cyclohexane as the water- carrying agent is 6 mL,the quantity of catalyst is equal to 0. 6% of feed stocks,and the reaction time is 60 min. Under these conditions,the yield of cyclohexanone 1,2- propanediol ketal can reach 85. 4 %.