强酸性阳离子交换树脂催化合成异丁醛乙二醇缩醛的研究

运用条件实验法，以异丁醛、乙二醇为原料，强酸性阳离子交换树脂为催化剂，合成了异丁醛乙二醇缩醛产品。考察了带水剂品种及用量、反应时间、原料异丁醛与乙二醇摩尔比、催化剂用量等反应条件对产品收率的影响。结果表明，在反应温度95℃，反应时间4h，异丁醛与乙二醇摩尔比1：1．5，带水剂苯用量为25mL，催化剂强酸性阳离子交换树脂用量为2．5g（相对0．2mol异丁醛）的催化反应条件下，异丁醛乙二醇缩醛产品收率达到88．16％，产品纯度达到99．5％以上。

Study on Catalytic Synthesis of Isobutyraldehyde Glycol Acetal by Strong Acidic Cation Exchange Resin

Using conditional test, the isobutyraldehyde glycol acetal was synthesized from isobutyraldehyde and ethylene glycol by direct esterification using strong acidic cation exchange resin as catalyst. The effects on reaction conditions including kinds and dosage of water - carrying agent, reaction time, molar ratio, the content of catalyst on yield of product were examined. The yield and the purity of the product could be up to 88.16% and 99.5% respectively under the reaction conditions as follows： reaction temperature 95 ℃, reaction time 4 hours, molar ratio of isobutyraldehyde to glycol 1 ： 1.5, volume of benzene as water - carrying agent 25 mL, dosage of catalysts 2.5 g （ based on 0. 2 mole isobutyraldehyde）.