硫酸钛催化合成乙酸异戊酯的工艺研究

The Study on Synthesis Technique of Isoamyl Acetate Catalyzed by Titanium Sulphate

以硫酸钛为催化剂,乙酸与异戊醇为原料合成了乙酸异戊酯,分别讨论了酸醇物质的量比、催化剂用量、反应时间等因素对酯化率的影响。确定了最佳工艺条件为:以0.2 mol乙醇为基准,酸醇物质的量比为1.5:2,催化剂用量为0.5g,反应时间为90min,乙酸异戊酯的酯化率为99.18%。该催化剂具有催化活性高、用量小、反应时间短、可连续使用多次、与目前工业中使用的硫酸相比污染小、对设备无腐蚀等优点,且硫酸钛来源广泛、性质稳定、不溶于反应体系,是一种很有发展前景的催化剂。

Using titanium sulphate as the catalyst, isoamyl acetate was synthesized from acetic acid and isoamyl alcohol. The effects of the amount of catalyst, reaction time, molar ratio of acid to alcohol on esterification rate were discussed respectively and the optimal reaction conditions were obtained ： based on 0.2 mol alcohols, the molar ratio of acetic acid to isoamyl alcohol was 1.5： 2, the amount of catalyst was 0.5g, and the reaction time was 90 min. Under these conditions, the esterification rate could reach 99.18 %. Titanium sulphate catalyst had many advantages, such as high activity, less required amount, short reaction time, non - corrosion and non - pollution to the environment compared with sulfuric acid which was used in industry at present and could be used repeatedly. And the catalyst was abundant, stable, not dissolving into reaction system, and it had a good developing foreground.