玻璃球负载纳米级SO_4^(2-)/TiO_2固体超强酸催化合成丙酸苄酯  

Catalytic synthesis of benxyl propinate with crystal ball supported nano-sized SO_4^(2-)/TiO_2 solid superacid

作　　者：魏青[1] 张萍[1] 刘占荣[1] 刘树彬[1] 

机构地区：[1]石家庄学院化工学院,河北石家庄050035

出　　处：《河北科技大学学报》2009年第2期109-111,115,共4页Journal of Hebei University of Science and Technology

摘　　要：用玻璃球负载纳米级SO42-/TiO2固体超强酸催化合成丙酸苄酯,对丙酸苄酯的合成条件和催化剂的重复使用效果进行了研究。在最佳反应条件下,丙酸的转化率为97.5%。实验还表明,该催化剂对丙酸和苄醇的酯化反应在重复使用5次后,反应3.0 h时丙酸的转化率变为90.3%,催化产物的气相色谱说明该催化剂选择性好,无副产物生成,是合成丙酸苄酯的良好催化剂,具有较好的应用前景。The synthesis of benxyl propinate with the crystal ball supported nano-sized SO4^2-/TiO2 solid superacid as catalysts was studied, including esterifieation conditions and effect of repeated use of the catalyst. Under optimum synthesis condition, the conversion rate of propionic acid is 97.5%. As a result, after the catalyst is used repeatedly for five times （3.0 h one time）, the 3.0 h conversion rate of propionic acid becomes down to 90.3% for the esterificational reaction of propionic acid and alpha-hydroxytoluene. The selectivity of catalyst is good and no by products were formed by gas chromatography. It is excellent for the synthesis of benxyl propinate.

关 键 词：纳米级SO42-/TiO2 固体超强酸 催化 丙酸苄酯 

分 类 号：O643.36[理学—物理化学]