硅胶负载硅钨酸催化合成乙酸异戊酯

Catalytic synthesis of isoamyl acetate with H_4SiW_(12)O_(40)/SG

以硅胶负载硅钨酸为催化剂,乙酸和异戊醇为原料催化合成了乙酸异戊酯。探讨了乙酸与异戊醇量比、催化剂用量、带水剂及反应时间对收率的影响。结果表明,在n(乙酸):n(异戊醇)=1:1.6,催化剂用量为0.3g,带水剂环己烷8mL,反应时间45min的优化条件下,乙酸异戊酯的收率可达93.0%。

The synthesis of isoamyl acetate was studied with H4 SiW：2 040/silica gel （SG） as catalyst. Effect of molar ratio of acetic acid to isoamyl alcohol, the dosage of catalyst, the volume of cyclohexane as the water-carrying agent and reaction time on the yield were discussed and the best conditions were found out. The optimum conditions are： molar ratio of acetic acid to isoamyl alcohol is 1 ： 1.6, the quantity of catalyst is 0. 3g, the volume of cyclohexane as the water-carrying agent is 8 mL, and the reaction time is 45min. H4 SiW12 040/silica gel is an excellent catalyst for synthetizing isoamyl acetate and its yield can reach 93.0%.