欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2016, Vol. 16 ›› Issue (5): 876-881.DOI: 10.12034/j.issn.1009-606X.216145

• 材料工程专栏 • 上一篇    下一篇

ZrO2?TiO2复合催化剂的制备及其催化合成柠檬酸三丁酯

于清跃,王监宗,于荟,武文良,朱新宝   

  1. 南京林业大学化工学院
  • 收稿日期:2016-03-02 修回日期:2016-05-12 出版日期:2016-10-20 发布日期:2016-10-14
  • 通讯作者: 武文良 wwl@njut.edu.cn

Preparation of ZrO2?TiO2 Composite Catalyst and Its Function for Synthesis of Tributyl Citrate

YU Qing-yue 1,WANG Jian-song 1,YU Hui 1,WU Wen-liang 2,ZHU Xin-bao 1   

  1. 1. College of Chemical Engineering, Nanjing Forestry University
    2. State key Laboratory of Materials-Oriented Chemical Engineering，College of Chemistry and Chemical Engineering, Nanjing University of Technology
  • Received:2016-03-02 Revised:2016-05-12 Online:2016-10-20 Published:2016-10-14
  • Contact: WU Wen-liang wwl@njut.edu.cn

PDF

摘要： 采用共沉淀法制备复合催化剂ZrO2?TiO2，对其晶体形态、形貌、比表面积、孔性质、酸性质进行了表征，考察了其对柠檬酸与正丁醇酯化反应的催化性能. 结果表明，复合物中ZrO2含量为25%(?)时，ZrO2?TiO2呈无定型形态，比表面积为239.6 m2/g，兼具B酸和L酸，NH3吸附量为670 μmol/g. 25% ZrO2?TiO2对柠檬酸与正丁醇酯化反应催化效果最好，柠檬酸转化率最大，为96.6%，柠檬酸正三丁酯的选择性为98.2%，适宜的反应条件为反应温度115℃，反应时间90 min，反应5次后柠檬酸转化率保持80%以上，柠檬酸三丁酯选择性约为98%.

关键词: 柠檬酸三丁酯, 柠檬酸, 正丁醇, 二氧化锆, 二氧化钛

Abstract: ZrO2?TiO2 composite catalysts were prepared by method of coprecipitation. The crystal morphologies of samples were characterized, specific surface area and pore size distribution of samples were identified, the acid properties of catalysts were identified, and catalytic performances were investigated by esterification of citric acid with n-butyl alcohol. The results showed that when ZrO2 was 25%(?) among the complex oxide, sample ZrO2?TiO2 was shown amorphous, its specific surface area of 239.6 m2/g, with B acid and L acid centres for NH3 adsorption capacity of 670 μmol/g. Esterification of citric acid with n-butyl alcohol was investigated over 25%ZrO2?TiO2 as catalyst. The conversion rate of citric acid reached to 96.6% and selectivity of trbutyl citrate exhibited is 98.2% while the suitable reaction conditions are reaction temperature of 115℃ and balanced time of 90 min. After reaction 5 times, conversion rate of citric acid keeps higher than 80%, and selectivity of tributyl citrate is about 98%.

Key words: tributyl citrate, citric acid, n-butyl alcohol, zirconium dioxide, titanium dioxide

中图分类号: