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以H3PW6Mo6O40/SiO2为催化剂,用丁醛和1,2-丙二醇为原料催化合成了丁醛1,2-丙二醇缩醛,正交实验法探讨得出的适宜反应条件为:固定丁醛用量0.2mol,丁醛与1,2-丙二醇的物质的量之比为1.0:1.5,催化剂H3PW6Mo6O40/SiO2用量占反应物料总质量的0.8%,反应时间30min,带水剂环己烷的用量12mL。在该反应条件下,丁醛1,2-丙二醇缩醛的收率可达83.42%。
The butyraldehyde 1,2-propanediol acetal was synthesized from butyraldehyde and 1,2-propanediol using H3PW6Mo6O40 / SiO2 as catalyst. The suitable reaction conditions obtained by orthogonal experiment were as follows: the amount of butyraldehyde was fixed at 0.2mol , The ratio of the amount of butyraldehyde to 1,2-propanediol was 1.0: 1.5, the amount of H3PW6Mo6O40 / SiO2 catalyst accounted for 0.8% of the total mass of the reaction mass, the reaction time was 30 min, and the amount of cyclohexane in the water-carrying agent was 12 mL. Under the reaction conditions, the yield of butyraldehyde 1,2-propanediol acetal reached 83.42%.