【摘要】 研究了合成苹果酯的催化剂固体酸SnCl4/C、固体超强酸SO2 -4/Fe2 O3 、SO2 -4/TiO2 /La3 + 、离子交换树脂的催化效能。从中筛选出最佳催化剂———固体超强酸SO2 -4/TiO2 /La3 + 。使用该催化剂进行苹果酯合成的最佳工艺条件为 :当乙酰乙酸乙酯和乙二醇的用量分别为 0 1和 0 2mol时 ,催化剂用量为 2g ,带水剂苯的用量为 15mL ,反应时间为 2h ,酯化产率达到了 84 7%。更多还原

【Abstract】 SnCl 4/C, SO 2- 4/Fe 2O 3, SO 2- 4/TiO 2/La 3+ and ion exchange resin were used as the catalyst in the synthesis of apple essence It was found that SO 2- 4/TiO 2/La 3+ was the best catalyst, and the best conditions of synthesizing apple essence using this catalyst was 0 1 mol of molar ethyl acetoacetate, 0 2 mol of molar of glyco, 2 g of catalyst, 15 mL of water born reagent(benzene), and 2 hours of reaction time更多还原