新型稀土铁系固体超强酸的制备和三醋酸甘油酯的催化合成

Preparation of Rare Earth Ironic Solid-Superacid and Its Use in Catalyzing the Synthesis of Glyceryl Triacetates

用稀土元素La3 + 对铁系固体超强酸Fe2 O3 /S2 O2 -8进行改性 ,制备出新型稀土铁系固体超强酸催化剂Fe2 O3 /S2 O2 -8/La3 + ,并将其用于催化合成三醋酸甘油酯。酯化反应的最佳条件为 :甘油 10 0mmol,n(酸 )∶n(醇 ) =6∶1,催化剂用量为原料总质量的 3.3% ,反应时间 3h ,带水剂苯 7mL ,酯化率达

A catalyst of rare earth and ironic solid-superacids(Fe 2O 3/S 2O 2 - 8/La 3 +) was prepared by modifying the solid superacids with lanthanum, and was used in the synthesis of glyceryl triacetates. The optimum reacting conditions were as follows: glycerine was 100mmol, the mole ratio of acetic acid to glycerine 1 ∶6, the quantity of catalyst was 1.5g, the reaction time was 3h,benzene of bring-water reagent was 7mL. The yield of esterification was up to 93% under the optimum conditions.