摘要
用沉淀浸渍法制备固体超强酸SO42-/ZrO2-TiO2-Fe2O3催化剂,利用TG和XRD进行表征.将该催化剂用于醇酸反应制备乙酸异戊酯,考察了反应条件对酯化率的影响.结果表明,当Zr、Ti和Fe的摩尔比为1∶3∶2时,催化剂活性最高.其催化合成乙酸异戊酯的适宜工艺条件为:醇酸摩尔比1.3∶1,催化剂用量(以0.25 mol乙酸计)1.0 g,带水剂用量10 mL,反应时间3 h.在此条件下,酯化率达98.5%.
A solid superacid catalyst of SO4^2-/ZrO2-TiO2-Fe2O3 was prepared by precipitation impregnation method and was characterized by TG and XRD. The effects of catalyst synthesis and esterification reaction conditions on the yield of the isoamyl acetate were investigated. The results show that the activity of the SO4^2-/ZrO2-TiO2-Fe2O3 catalyst is the highest when the Zr/Ti/Fe atom molar ratio in the catalyst is 1.3 ： 2, The optimum reaction conditions are 10 mL catalyst of 1.0 g , alcohol to acid mole ratio of 1.3 ： 2, water carrying agent of 10 mL and reflux time of 3.0 h. Under these conditions, the yield of esterification is up to 98.5%.
出处
《大连交通大学学报》
CAS
2009年第4期39-42,共4页
Journal of Dalian Jiaotong University
关键词
固体超强酸
乙酸异戊酯
酯化率
solid superacid
isoamyl acetate
esterification yield
