固体超强酸SO_4^(2-)/TiO_2催化合成苹果酸二丁酯的研究

Synthesis of Dibutyl Malate with Solid Superacid SO_4^(2-)/TiO_2 as Catalyst

以固体超强酸SO42-/TiO2为催化剂,以苹果酸和正丁醇为原料催化合成苹果酸二丁酯,并探讨了酸醇比、催化剂的用量、反应时间、带水剂等因素对酯化反应的影响。结果表明,酸醇比为1∶4(苹果酸0.04 mol),催化剂用量为0.80 g,带水剂用量为2 mL,反应时间为5 h时,苹果酸二丁酯的产率可达90%以上。

Dibutyl malate was synthesized from malic acid and butyl alcohol used solid superacid SO4^2-/TiO2 as catalyst.The influence factors such as kind and amount of catalyst,reaction time,reaction temperature and so on were studied.The results showed that when the molar ratio of malic acid to butyl alcohol was 1∶4（0.04 mol of malic acid）,amount of catalyst was 0.8 g,benzene of bring-water reagent 2 mL,reaction time 5 h,the yield of esterification was up to 90%.