SO_4^(2-)/TiO_2催化合成乙酸戊酯

Synthesis of Amyl Acetate Using SO_4^(2-)/TiO_2 as a Catalyst

以Ti(OBu)4为原料,采用溶胶-凝胶法制备了固体超强酸SO24-/TiO2,其结构经XRD,DRS及IR表征。以SO24-/TiO2为催化剂,通过乙酸与戊醇反应合成了乙酸戊酯。讨论了影响酯化率的主要因素。实验结果表明,当催化剂用量为0.6 g,乙酸87.3 mmol,醇酸摩尔比为1.4∶1.0,于115℃反应6 h时,平行实验的平均酯化率可达94.2%。

Solid superacid SO4^2-/TiO2 was prepared by a sol-gel method with titanium tetrabutoxide as precursor and was characterized by XRD, DRS and IR. Amyl acetate was synthesized from acetic acid and amyl alcohol in the presence of SO4^2-/TiO2. The primary factors which influence the esterification efficiency of acetic acid are discussed. The optimal reaction conditions were as follows： acetic acid was 87.3 mmol; n（ amyl alcohol） ： n（ acetic tion at 115℃ for 6 h. The average esterification under the optimal reaction conditions. acid） was 1.4 ： 1.0 ; SO4^2-/TiO2 was 0.6 g; reacefficiency of parallel experiments can reach 94.2% under the optimal reaction conditions.