水热法制备固体酸SO_4^(2-)/ZrO_2催化合成乙酸正丁酯

SO_4^(2-)/ZrO_2 Solid Acid Catalyst was Prepared by Hydrothermal Method and its Application in the Synthesis of N-butyl Acetate

通过水热法制备出SO42-/ZrO2固体酸催化剂,对催化剂进行XRD、IR表征,并以冰乙酸和正丁醇的酯化反应为探针,探讨了各个因素对反应的影响.结果表明:当反应时间为2 h,n(正丁醇):n(冰乙酸)=2:1,催化剂用量为0.2%(占总物料的质量分数),酯化率可达99.1%.同时利用未经水热反应制备SO42-/ZrO2做对比实验,结果发现水热法比常规法制备的材料比表面积增加一倍.

SO4^2-/ZrO2 solid acid catalyst was prepared by hydrothermal method,the catalyst was phase esterification of acetic acid with n-butanol preformed to confirm the optimal conditions of preparation SO4^2-/ZrO2solid acid catalyst through hydrothermal modification made experiments in comparison with normal preparation method. At the same time, the influence of different factors on conversion of acetic acid was studied, The test results show in esterification reaction of SO4^2-/ZrO2 catalyst through hydrothermal modification; the technological conditions of n-butyl acetate are that the reaction time is 2h, n （ n - butanol） ： n （ acetic acid） = 2 ： 1, and w （ catalyst ） is 0.2% based on the total mass of initial materials. Conversion of acetic acid amounts to 99.1%. The catalysts were characterized with XRD and IR.