Catalytic Synthesis of Cyclohexanone 1,2-Propylene Ketal by Chitosan Supported With Iodine

Chitosan supported with Iodine was synthesized at room temperature and the structure was characterized by IR, XRD,and TGA.Ketalization of cyclohexanone and 1,2-propanediol catalyzed by chitosan supported with iodine was studied. The effect of reaction time,the ratio of alcohol and ketone,catalyst amount,and the volume of water-carrying agent on the yield of cyclohexanone 1,2-propylene ketal were investigated.The results show that the suitable condition for the reaction are as follows:the amount of cyclohexanone is 0.1 mol,the molar ratio of 1,2-propanediol and cyclohexanone is 1.3,the amount of catalyst is 0.4 g,the volume of cyclohexane used as the wate-carrying agent is 8 mL,reaction time is 60 min.The ketal yield is up to 96.3%.The catalyst could be reused five times without significant declining of catalytic activity.