【摘要】 用氨基磺酸两步法催化合成乙酰柠檬酸三丁酯。实验确定了最佳工艺条件 :(1 )酯化反应 :以 0 2mol柠檬酸为基准 ,n (柠檬酸 )∶n (正丁醇 ) =1 0∶4 0 ,m(催化剂 ) =1 5g ,t =1 1 0～1 6 0℃ ,t=2 5h ,转化率为 98 2 % ;(2 )乙酰化反应 :以 0 2mol柠檬酸三丁酯为基准 ,n (柠檬酸三丁酯 )∶n (乙酸酐 ) =1 0∶1 5 ,m(催化剂 ) =2 0g ,t =85℃ ,t=1 5h ,乙酰化收率为 91 3%。催化剂易回收 ,可循环使用 ,不污染环境。更多还原

【Abstract】 Tributyl acetylcitrate was prepared in two steps with aminosulfonic acid as catalyst.The optimun reaction conditions were determined.(1)In esterification reaction,molar ratio of citric acid to butyl alcohol was 1.0∶4.0,reaction time was 2.5 h at 110～160 ℃,and mass of catalyst was 1.5 g(based on 0.2 mol citric acid).The yield of esterification reached 98.2%.(2)In acetylation reaction,molar ratio of tributyl citrate to acetic anhydride was 1.0∶1.5,reaction time was 1.5 h at 85 ℃,and mass of catalyst was 2 g(based on 0.2 mol tributyl citrate).The yield of acetylation was 91.3%.This catalyst had many advantages,such as easy to be recovered,feasible to be used repeatedly,and less pollution to environment.更多还原