首次以固体超强酸SO42-/SnO2-S iO2为催化剂合成柠檬酸异辛酯,考察了合成柠檬酸异辛酯所用固体超强酸SO42-/SnO2-S iO2的最佳制备条件:n(Sn)∶n(S i)=1∶1,浸渍液H2SO4为3 mol/L,浸渍时间为1 h,在550℃下焙烧3 h,并通过XRD、FT-IR等方法对其进行表征;此外还考察了摩尔比、催化剂用量、反应时间及催化剂重复使用对酯化反应的影响。结果表明,酯化反应的最佳条件为:酸醇摩尔比为1∶5,催化剂用量为反应物总质量的1.2%,反应时间为20 m in,反应微波辐射功率为680 W,此条件下酯收率可达99.5%。 For the first time, isooctyl citrate was synthesized using solid superacid SO42- / SnO2-S iO2 as catalyst. The optimum conditions for the synthesis of solid superacid SO42- / SnO2-S iO2 for synthesizing isooctyl citrate were investigated: n (Sn) (S i) = 1: 1, the impregnation solution H2SO4 is 3 mol / L, the impregnation time is 1 h, calcined at 550 ℃ for 3 h, and characterized by XRD, FT-IR and other methods The effects of molar ratio, amount of catalyst, reaction time and repeated use of catalyst on the esterification reaction were investigated. The results showed that the optimum conditions of esterification were as follows: the molar ratio of alcohol to alcohol was 1: 5, the amount of catalyst was 1.2% of the total mass of the reactants, the reaction time was 20 min, the reaction microwave power was 680 W Ester yield up to 99.5%.