固体酸SO_4^(2-)/MoO_3-TiO_2-SiO_2催化合成硬脂酸月桂酯  

Synthesis of dodecyl stearate catalyzed by solid acid SO_4^(2-)/MoO_3-TiO_2-SiO_2

作　　者：施宇[1] 邓宝祥[1] 王华锋[1] 

机构地区：[1]天津工业大学环境与化学工程学院,天津300160

出　　处：《天津工业大学学报》2011年第1期66-69,共4页Journal of Tiangong University

摘　　要：以固体酸SO42-/MoO3-TiO2-SiO2为催化剂,以硬脂酸和月桂醇为原料催化合成硬脂酸月桂酯,得出最佳酯化反应条件为:醇酸物质的量比1.2∶1.0,催化剂的质量分数2%,反应时间3h,甲苯用量5mL,反应温度140℃.该反应的酯化率可达97.9%,且催化剂可重复使用.最后用FT-IR对催化剂SO42-/MoO3-TiO2-SiO2进行分析表征,表明SO42-在催化剂表面为螯合双配位吸附.Dodecyl stearate was synthesized from stearic acid and dodecanol using solid acid SO42-/MoO3-TiO2-SiO2 as catalyst.The better process conditions of synthesis of dodecyl stearate were obtained with a alcohol to acid ratio of 1.2∶1.0,catalyst amount of 2%,methylbenzene amount of 5 mL,reaction time 3 h,reaction temperature 140 ℃ with the ratio of esterification 97.9%,and the catalyst could be used repeatedly.At last,the characteristic of solid acid SO42-/MoO3-TiO2-SiO2 is analyzed by using infrared absorption spectrum.The results show that the acid sites on SMT surface exhibited a chelating ligand structure.

关 键 词：固体酸SO42-/MoO3-TiO2-SiO2 硬脂酸月桂酯 酯化 

分 类 号：O643.36[理学—物理化学] O623.6[理学—化学]