Synthesis of Butyraldehyde 1,2-Propanediol Acetal with H_3PW_6Mo_6O_(40)/TiO_2 as Catalyst

Using butyraldehyde and 1,2-propanediol as raw materials, H3PW6Mo6O 40 /TiO2 as catalyst, butyraldehyde 1,2-propanediol acetal is synthesized. Various factors concerned in the reaction, such as mass ratio, the content of catalyst and reaction time have been investigated. The optimum conditions have been found, that is, the molar ratio of butyraldehyde to 1,2-propanediol is 1 to 1.7, the mass ratio of the catalyst used is 1.0% of the total reactants, the water-carrying agent cyclohexane is 8 mL and the reaction time is 1.0h. Under these conditions, the yield of butyraldehyde 1,2-propanediol acetal can be reached 80.8%.