稀土固体超强酸Gd3+-SO42-/ZrO2催化合成乙酸异戊酯

以乙酸、异戊醇为原料,固体超强酸Gd3+-SO2-4/ZrO2为催化剂,催化合成乙酸异戊酯。确定了固体超强酸的最佳焙烧温度,进行了固体超强酸Gd3+-SO2-4/ZrO2和SO2-4/ZrO2催化活性对比实验,以及考察了原料酸醇比、反应时间、催化剂用量对酯化率的影响。实验结果表明:反应温度110~115℃,催化剂用量2 g,n(异戊醇)∶n(乙酸)=2.0∶1.0,反应时间2 h,酯化率可达88.4%,催化剂重复使用效果明显,加Gd3+的固体超强酸的催化活性明显增强。

Synthesis of Isoamyl Acetateby Rare Earth Solid Superacid Gd3+-SO2-4/ZrO2 Catalyst

Isoamyl acetate was obtained by the reaction of acetic acid with isoamyl alcohol , with rare earth solid superacid Gd 3＋-SO2-4 /ZrO2 as the reactive catalyst was described.The esterification reaction was performed to confirm the optimal conditions of preparation.The experiments were compared with the rare earth solid superacid Gd 3＋-SO2 -4 /ZrO2 catalyst, and the ratio of isoamyl alcohol was investigated with acetic acid , reacted time, the mass of catalyst influences on the catalytic activity.The results showed that isoamyl alcohol acetate was prepared by reaction at 110 ~115 ℃for 2 h with n（isoamyl alcohol）：n（acetic acid）=2.0：1.0, and（catalyst）=2 g, the conversion of acetic acid amounts was 88.4%, catalyst was used repeatedly but still had high catalytic activity , and catalytic activity of the solid super acid which added Gd 3＋improved apparently.