固体超强酸SO_4^(2-)/TiO_2催化合成蔗糖八乙酸酯研究

Studies on the Synthesis of Sucrose Octaacetate by SO_4^(2-)/TiO_2 Solid Superacid

采用固体超强酸ＳＯ２－４ ／ＴｉＯ２ 为催化剂，蔗糖和乙酸酐反应合成蔗糖八乙酸酯。最佳反应条件为：糖酸摩尔比１∶１０，催化剂用量９％ ，反应时间３ ｈ，反应温度１３４～１３６℃，产率可达９１．２％ 。

From sucrose and acetic anhydride the synthesis of sucrose octaacetate was catalyzed by SO 2- 4/TiO 2 solid superacid. The factors influencing on the yield of the reaction were discussed. The reaction conditions recommended are: molar ratio of sucrose to acetic anhydride, 1∶10; amount of SO 2- 4/TiO 2 catalyst, 9%; reaction temperature, 134～136℃; reaction time, 3 h; yeild, 91.2%.