纳米固体超强酸SO_4^(2-)/Fe_2O_3的制备及其催化合成尼泊金酯  

Preparation of nano solid superacid SO_4^(2-)/Fe_2O_3 used as a catalyst to synthesize nipagin esters

作　　者：王文敏[1] 许文苑[2] 罗明标[2] 

机构地区：[1]江西农业大学理学院,南昌330045 [2]东华理工学院应用化学系,抚州344000

出　　处：《食品科技》2005年第8期49-51,共3页Food Science and Technology

基　　金：国家自然科学基金资助项目(40371067)。

摘　　要：纳米粉体Fe2O3经一定浓度H2SO4浸泡活化后制成纳米固体超强酸SO24-/Fe2O3,将其应用于催化合成尼泊金酯以考察催化活性。研究了纳米固体超强酸制备过程及酯化过程中各因素的影响,研究结果表明较好的制备条件是:1.0mol/LH2SO4、焙烧温度500℃、焙烧时间3h。在优化反应条件下,尼泊金正丁酯收率为95.18%;尼泊金异丁酯收率为92.76%。Nano solid superacid SO^2- 4/Fe2O3 was prepared by immersing nano Fe2O3 powder into sulphuric acid and activating it. Its activity was examined by acting as a catalyst to synthesize nipagin esters. The effects of varied factors in nano solid superacid preparation and esterification were investigated. The results indicated that the better reaction conditions were as follows： 1.0mol/L of H2SO4 concentration, baking temperature at 500℃ and 3 hours of baking time. Under optimum conditions, the yield of n-butyl p-hydroxybenzoate was 95.18% and the yield of iso-butyl p-hydroxybenzoate was 92.76%.

关 键 词：纳米 固体超强酸 制备 尼泊金酯 

分 类 号：TS201.2[轻工技术与工程—食品科学]