摘要
以γ-丁内酯,乙酸乙酯为原料,金属钠和乙醇钠为催化剂,甲苯为溶剂合成α-乙酰基-γ-丁内酯。在金属钠与乙醇钠的钠摩尔比为7:3,甲苯/γ-丁内酯(w/w)=2.51,反应温度85~90℃,反应时间5h,n(乙酸乙酯):n(GBL):金属钠为2.27:0.9:1的条件下;GBL转化率≥98%,ABL收率≥95%。
α-Acetyl-γ-Butyrolactone is prepared with γ-Butyrolactone,ethyl acetate as materials;Useing Sodium and Sodium-ethylate as the Catalyst;Using Toluene as the Solvent.Molar ratio of Sodium about Sodium and Sodium-ethylate that is 7:3;Ratio of Toluene and γ-butyrolactone(w/w)that is 2.51;Reaction temperature 85~90℃;Reacti-on time 5 h,Molar ratio of ethyl acetate,γ-butyrolactone and sodium that is 2.27:0.9:1.the conversion of γ-buryrolactone is above 98%,selectivity of α-Acetyl-γ-Butyrolactone 95%.
