Catalytic synthesis of butanone 1,2-propanediol ketal by p-CH_3C_6H_4SO_3H·H_2O

Butanone-1,2-propanediol ketal was prepared from butanone and 1,2-propanediol using p-CH3C6H4SO3H·H2O as a catalyst.The optimal reaction conditions were screened by orthogonal test method.The yield of butanone-1,2-propanediolketal can reach 72.89% under the optimum reaction conditions that butanone is 0.2mol,molar ratio of butanone to 1,2-propanediolglycol is1.0∶1.6,the quantity of catalyst is equal to 1.3% of the feed stocks,the volume of cyclohexane as the carrying-water agent is 15mL,and the reaction time is 1.0h.The product was characterized by the index of refractive,IR and 1H NMR.