磁性纳米固体超强酸SO_4^(2-)/TiO_2催化合成没食子酸正丙酯催化剂合成条件的考察

Synthesis of Gallicacid Propyl Ester Catalyzed by Magnetic Nanograde Solid Super Acid

研究了磁性纳米固体超强酸SO42-/TiO2为催化剂,以没食子酸与正丙醇为原料合成没食子酸酯的反应。探讨了固体超强酸制备过程中浸泡液浓度、浸泡时间、焙烧温度、焙烧时间对酯产率的影响。结果表明最适宜的制备条件是:浸泡液硫酸浓度0.5 mol/L,浸泡时间2 h,焙烧温度500℃,焙烧时间2 h制得的催化剂催化合成没食子酸正丙酯催化活性最好,酯收率可达82.2%。

The synthesis of gallic acid ester was studied using magnetic nanograde SO4^2-/TiO2 solid super acid as catalyst with gallic acid and n - propylalcohol as maters. The factors on which influence catalytic form four points： the diplye concentration of H2SO4, the soaking time, the baking temperation and thebaking time. The result showed that the optimal preparation conditions were as follow：the diplye concentration of H2SO4 was 0.5 mol/L, the soaking time was 2 h, the baking temperature was 500℃, the baking time was 2 h and the yield of gallic acid ester was 82.2%.