SO_4^(2-)/ZrO_2-TiO_2催化合成乙酸环乙酯

Synthesis of Cyclohexyl Acetate Catalyzed by SO_4^(2-)/ZrO_2-TiO_2

研究了SO42-/ZrO2-TiO2催化乙酸与环己醇的酯化反应,考察了醇酸物质的量比、催化剂用量、反应时间和带水剂用量等因素对酯化率的影响。结果表明,乙酸用量0.5mol,醇酸物质的量比1.2,SO42-/ZrO2-TiO2用量5%,带水剂环己烷2.50mL。回流反应60min后酯化率可达96.4%,催化剂重复使用5次仍保持较高活性。

The esterification reaction of acetic acid and cyclohexanol catalyzed by SO42-/ZrO2-TiO2 was studied.The effects of different factors such as molar ratio of alcohol to acid,dosage of catalyst and water-carrying agent,reaction time on the yield of cyclohexyl acetate were examined.The result showed that,the optimal reaction conditions were as follows：dosage of acetic acid 0.50 mol,molar ratio of cyclohexanol to acetic acid 1.2,dosage of SO42-/ZrO2-TiO2 5%,dosage of cyclohexane as water-carrying agent 2.50 mL,reaction time 60 min at reflux temperature.The esterification rate could reach 96.4%.The catalyst kept high activity after recycling for 5 times.