活性炭负载磷钨酸催化合成硬脂酸乙酯  

Catalytic synthesis of ethyl stearate over active carbon supported phosphotungstic acid

作　　者：马荣萱[1] 李西安[1] 

机构地区：[1]延安大学化学与化工学院,陕西延安716000

出　　处：《工业催化》2010年第12期63-65,共3页Industrial Catalysis

摘　　要：研究以活性炭负载磷钨酸为催化剂合成硬脂酸乙酯,考察了催化剂种类和用量、酸醇物质的量比、反应时间和带水剂对酯化反应的影响。结果表明,在酸醇物质的量比为1:8、催化剂用量1.2 g,为反应物总质量的5.22%(磷钨酸质量分数为1.95%)、带水剂为环己烷、反应温度(80～85)℃和反应时间4 h的条件下,酯化率可达85.57%。Ethyl stearate was synthesized using stearic acid and anhydrous ethanol as raw materials and active carbon supported phosphotungstic acid as the catalyst. Influence of the catalyst kinds and dosage, molar ratio of stearic acid/anhydrous ethanol, reaction time and water carrying agents was investigated. The results showed that esterification rate of 85. 57% was attained under the reaction condition as follows ： n （ stearie acid） ： n （ anhydrous ethanol） = 1 ： 8, catalyst dosage 1.2 g [ 5.22% of the mass of the total reactants （ phosphotungstic acid net content 1.95 % ） ], cyelohexane as water carrying agent, reaction temperature （80 - 85） ℃ and reaction time 4 h.

关 键 词：催化化学 硬脂酸乙酯合成 活性炭负载磷钨酸 带水剂 

分 类 号：O643.36[理学—物理化学] O623.624.2[理学—化学]