以活性炭负载磷钨酸作催化剂,对以苯乙醛和乙二醇为原料合成苯乙醛乙二醇缩醛的反应条件进行了研究。实验结果表明:活性炭负载磷钨酸是合成苯乙醛乙二醇缩醛的良好催化剂,较系统地研究了醛醇摩尔比、催化剂用量、反应时间诸因素对产率的影响。最佳反应条件为:n(苯乙醛)∶n(乙二醇)∶n(催化剂)=1∶1.2∶0.0034,带水剂环己烷12m l,反应时间90min。上述条件下,苯乙醛乙二醇缩醛的产率可达90.24% The conditions for the synthesis of phenylacetaldehyde glycol acetal from phenylacetaldehyde and ethylene glycol were studied by using activated carbon supported phosphotungstic acid as catalyst. The experimental results show that the activated carbon supported phosphotungstic acid is a good catalyst for the synthesis of acetaldehyde ethylene glycol acetal. The effects of the molar ratio of aldol to alcohol, the amount of catalyst and the reaction time on the yield were studied systematically. The optimal reaction conditions are as follows: n (phenylacetaldehyde): n (ethylene glycol): n (catalyst) = 1: 1.2: 0.0034, cyclohexane 12m l, reaction time 90min. Under the above conditions, the yield of phenyl acetal ethylene glycol acetal can reach 90.24%