摘要
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%。
Butyraldehyde1,2-propanediol acetal was synthesized from butyraldehyde and 1,2-propanediol in the presence of H3PW6Mo6O40/SiO2 as catalyst.The optimal reaction conditions were screened by orthogonal test method.The yield of butyraldehyde 1,2-propanediol acetal can reach 83.42% under the optimum reaction conditions that butanone is 0.2mol,molar ratio of butyraldehyde to 1,2-propanediol is 1:1.5,the quantity of catalyst is 0.8%,the reaction time is 30min and the cyclohexane as carrying-water reagent is 12mL.
