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Citation: CHEN Dan-Yun, ZOU Xue-Yan, HE Jian-Ying. Preparation of Solid Acid SO₄^2-/SnO₂-Diatomite and Its Catalytic Application for Synthesis of Isoamyl Butyrate[J]. Chinese Journal of Applied Chemistry, ;2010, 27(7): 797-800. doi: 10.3724/SP.J.1095.2010.90563 shu

Preparation of Solid Acid SO₄^2-/SnO₂-Diatomite and Its Catalytic Application for Synthesis of Isoamyl Butyrate

a. Institute of Fine Chemistry and Engineering, Henan University, Kaifeng 475004;
b. Teaching Center for Fundamental Experiment, Henan University, Kaifeng 475004

Received Date: 27 August 2009
Revised Date: 25 November 2009

A solid acid SO₄^2-/SnO₂-diatomite was prepared by aging of diatomite-Sn(OH)₄ sol at 70℃ for 12 h,drying for 12 h at 90℃,impregnating in 3.0 mol/L H₂SO₄ for 3 h,and calcinating at 550℃ for 3.5 h. The solid acid was characterized by using IR,XRD and TG methods. The sol of diatiomite-Sn(OH)₄ was prepared with 1:3 mass ratio of SnCl₄·5H₂O to diatomite. Then isoamyl butyrate was synthesized from n-butyric acid and isoamyl alcohol in the presence of the composite solid acid as the catalyst. Effects of catalyst dosage,molar ratio of isoamyl alcohol to n-butyric acid,reaction time,and type of water entrainer on the yield of isoamyl butyrate (IAB) were examed. Under the optimized reaction conditions,n(isoamyl alcohol):n(n-butyric acid)=1.4:1,reaction time in 70 min,benzene 10 mL,and the mass fraction of catalyst in total mass of reactants 2.5%,the yield of IAB was 97.7%. Compared with multi-composite solid acid and SO₄^2-/clay,the prepared catalyst possesses advantages of low cost,high activity,facile preparation and easy separation from the reaction system. It can be reused to a certain extent.
- solid acid,
- diatomite,
- isoamyl butyrate,
- catalysis,
- synthesis
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Preparation of Solid Acid SO42-/SnO2-Diatomite and Its Catalytic Application for Synthesis of Isoamyl Butyrate

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通讯作者: 陈斌, bchen63@163.com

Preparation of Solid Acid SO₄^2-/SnO₂-Diatomite and Its Catalytic Application for Synthesis of Isoamyl Butyrate