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《Chinese Rare Earths》 2010-04
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Synthesis of Isobutyl Isobutyrate with Solid Superacid SO_4~(2-)/SnO_2-CeO_2-kaolin as Catalyst

ZHOU Hui1,ZHANG Xia2,HE Jian-ying1,CHEN Dan-yun1(1.Chemistry and Chemical Engineering College of Henan University,Institute of Fine Chemistry and Engineering,Henan Kaifeng 475004;2.College of Continuous Education,Zhengzhou University of Light Industry,Zhengzhou 450002,China)  
Isobutyl isobutyrate was synthesized from isobutyric acid and isobutyl alcohol with solid superacid catalyst SO42-/SnO2-CeO2-kaolin.The catalyst was prepared under the conditions of mass ratio of ammonium ceric nitrate to kaolin to SnCl4·5H2O 1:9:20,concentration of sulfuric acid 2.0mol/L,impregnation time 12h,and calcination at 350℃ for 3h.The catalyst was characterized by Hammett indicator method and XRD.As using synthesis of isobutyl isobutyrate,the optimal conditions were:mass fraction of catalyst in all of reaction system 2.5%,mole ratio of isobutyl alcohol to isobutyric acid 1.4,reaction time 100min and toluene 10mL,the yield was 94.5%.The catalyst also has excellent stability.When it was reused for six times,the yield could be greater than 80%.The catalyst takes advantages of low cost,highly active,non-polluting and reusable.
【Fund】: 河南省科技厅2009年科技发展计划项目(092102210171);; 河南省教育厅自然科学研究计划项目(2008A150002)
【CateGory Index】: TQ225.241
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