微波辐射对甲苯磺酸催化合成丙酸异戊酯

Synthesis of Iso-amyl Propionate Catalyzed by P-Toluene Sulfonic Acid under Microwave Irradiation

在常压、微波辐射条件下,以对甲苯磺酸为催化剂,以丙酸和异戊醇为原料,合成了丙酸异戊酯。实验结果表明：催化剂对甲苯磺酸的用量为0．25 g,丙酸的用量为0．2 mol,异戊醇的用量为0．60 mol,微波辐射功率为750 W,辐射回流时间为12 min,酯化率可达96．6%。与常规加热方法相比,具有反应速度快、转化率高等优点。

With propionic acid and iso-amyl alcohol as raw material, p-Toluene sulfonic acid as catalyst, isoamyl propionate was synthesized directly under normal pressure and microwave irradiation. The most suitable reaction conditions were 0.25 g p -Toluenc suifonic acid ,0.2 mol propionic acid ,0.6 mol iso - amyl alcohol, and the microwave irradiation time were 2 rain with the power of 750 w. The conversion rate of propionic acid was 96.6% under the above reaction conditions. Compared with conventional heating method ,microwave irradiation has such advantages as faster reactions ,higher yields.