【摘要】 本文以二氧化硅负载磷钨酸(H₃PW₁₂O₄₀/SiO₂)为催化剂,丁醛和乙二醇为原料合成丁醛乙二醇缩醛,探讨了H₃PW₁₂O₄₀/SiO₂/SiO₂对缩醛反应的催化活性,研究了醛醇物质的量比、催化剂用量、反应时间等因素对产物收率的影响。实验结果表明:H₃PW₁₂O₄₀/SiO₂/SiO₂是合成丁醛乙二醇缩醛的良好催化剂。在固定丁醛用量为0.2mol的情况下,n（丁醛）:n（乙二醇）=1:1.4,催化剂的用量占反应物料总质量的1%,环已烷用量为4mL,反应时间为45min的条件下,产品收率可达77.6%。更多还原

【Abstract】 A novel catalyst,H,PW₁₂O₄₀/SiO₂ was synthesized by a sol-gel technique,and characterized by FT-IR and XRD.Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol in the presence of H₃PW₁₂O₄₀/SiO₂as catalyst.The factors influencing the synthesis were discussed and the best reaction conditions were found out.Experimental results showed that H₃PW₁₂O₄₀/SiO₂ is an excellent catalyst.Under the experimental conditions of molar ratio of butyraldehyde to glycol is 1:1.4,the mass ratio of the catalyst is 1.0%of all the reactants,volume of cyclohexane is 4mL,and the reaction time is45 min,the yield of butyraldehyde glycol acetal can reach 77.6%.更多还原