稀土固体超强酸催化合成柠檬酸三戊酯  

Synthesis of Tri(n-amy1) citrate catalyzed by rare-earth solid excess strong acid

作　　者：林谦[1] 陈秀宇[1] 

机构地区：[1]福建师范大学福清分校生物与化学系,福建福清350300

出　　处：《闽江学院学报》2012年第2期112-115,120,共5页Journal of Minjiang University

摘　　要：以柠檬酸和正戊醇为原料,采用自制的稀土固体超强酸SO42-/TiO2/La3+、SO42-/SnO2/La3+、SO42-/ZrO2/La3+、SO42-/Fe2O3/La3+为催化剂催化合成增塑剂柠檬酸三戊酯.通过单因素和正交实验考察了各反应因素对反应酯化率的影响.实验表明:当柠檬酸与正戊醇摩尔比为1:4.0、SO42-/TiO2/La3+催化剂用量为柠檬酸总量的4%、催化剂活化温度为250℃、反应温度140-150℃和反应时间3.0 h条件下,柠檬酸三戊酯的酯化率可达到97.3%,催化剂重复使用多次,活性未见明显降低.产品经红外光谱定性分析,纯度经气相色谱分析大于99%.Tri （n-amyl） citrate was synthesized from citric acid and n-amyl alcohol using selfCmade rareearth solid excess strong acid SO4^2-/TiO2/La^3＋、SO4^2-/SnO2/La^3＋、SO4^2-/ZrO2/La^3＋、SO4^2-/Fe2O3/La^3＋. Effects of different factors on the reaction were investigated by single-factor and orthogonal experiment. Experiment shows ： when file ration of citric acid to n-amyl alcohol molar is 1 ： 4. 0, the amount of catalyst is 4% of the total citric acid,the catalyst activation temperature is 250 ℃, the reaction temperature is 140 - 150 ℃ ,and the reaction time is 3 h ,Tri（ n-amyl ） citrate yield of 97.3% was attained. When the catalyst was repetitively used, the active didn＇t reduce obviously. The product was identified by IR and the purity determined by GC is over 99%.

关 键 词：稀土固体超强酸 催化合成 柠檬酸三戊酯 

分 类 号：TQ414.99[化学工程]