固体超强酸SO_4^(2-)/TiO_2-WO_3催化合成乙酸正戊酯

Catalytic Synthesis of n-Amyl Acetate with Solid Superacid SO_4^(2-)/TiO_2-WO_3

以新型固体超强酸SO2 -4/TiO2 WO3 为催化剂 ,用乙酸和正戊醇反应合成乙酸正戊酯。探讨了醇酸物质的量比、催化剂用量、反应时间等因素对酯收率的影响。实验表明 :固体超强酸SO2 -4/TiO2 WO3 具有较好的催化活性 ,醇酸物质的量比为 1.35∶1,催化剂用量为反应物料总质量的 1.0 % ,反应时间为 2 .0h ,反应温度 10 4～ 116℃ ,收率达 6 5 .0 %

The n-amyl acetate was synthesized from the reaction of acetic acid and n-amyl alcohol with a new type of solid superacid SO 2- 4/TiO 2-WO 3 as catalyst.The influence of the molar ratio of n-amyl alcohol and acetic acid , the quantity of the catalyst , the reaction time etc on the ester yield was discussed .The experiments showed that the solid superacid SO 2- 4/TiO 2-WO 3 has a better catalytic activity, the molar ratio of n-amyl alcohol and acetic acid is 1.35∶1,the quantity of catalyst is equal to 1.0% by mass of the total feed stocks , the reaction temperature is 104～116?℃, the reaction time is 2.0?h , and the yield reaches 65.0%.