TiSiW_(12)O_(40)/TiO_2催化合成葡萄糖酯的研究

以固载杂多酸盐TiSiW12 O4 0 /TiO2 为多相催化剂 ,对以乙酸酐、丙酸、丁酸、异丁酸和葡萄糖为原料合成葡萄糖酯的反应条件进行了研究。实验表明 :TiSiW12 O4 0 /TiO2 是合成葡萄糖酯的良好催化剂 ,最佳反应条件为 :n(糖 )∶n(酸 ) =1∶6 ,催化剂用量为反应物料总质量的 2 0 % ,反应时间为 2h。上述条件下 ,葡萄糖五乙酸酯的产率为 88 7% ,葡萄糖五丙酸酯的产率为 84 5 % ,葡萄糖五丁酸酯的产率为 85 4% ,葡萄糖五异丁酸酯的产率为 86 4%。

Study of Catalytic Synthesis of Glucose Esters with TiSiW_(12)O_(40)/TiO_2

Glucose esters were synthesized with acetic anhydride,propionic acid,butyric acid,isobutyric acid and glucose as reactants,and the reaction conditions were selected.It showed that TiSiW 12 O 40 /TiO 2 was an excellent catalyst for synthesis of glucose esters,and the optimun reaction conditions were that the molar ratio of glucose to acid was 1∶6,the mass ratio of catalyst to reactants was 2 0%,and the reaction time was 2 0 h.Under these conditions,yield of glucose pentaacetate was 88 7%,glucose pentapropionate 84 5%,glucose pentabutyrate 85 4% and glucose pentaisobutyate 86 4%.