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Citation: WU Jie, JIANG Jinlong, XUE Yinfei. Preparation and Characterization of Attapulgite Supported AlCl₃ Catalyst and Its Catalytic Properties[J]. Chinese Journal of Applied Chemistry, ;2011, 28(7): 791-797. doi: 10.3724/SP.J.1095.2011.00545 shu

Preparation and Characterization of Attapulgite Supported AlCl₃ Catalyst and Its Catalytic Properties

1.
a Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Department of Life Science and Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003;
2.
b Huaian Science and Technology Bureau, Huaian

Corresponding author: WU Jie,
Received Date: 25 November 2010
Available Online: 28 December 2010
Fund Project: 江苏省科技厅工业支撑计划资助项目(BE2009098) (BE2009098)

Immobilized AlCl₃ catalyst(AlCl₃/ATP) was prepared through solvent refluxing and adsorption method with attapulgite as the support and then used in the synthesis of aspirin.The catalyst was characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),specific surface area(BET),X-ray energy dispersive spectrometry(EDS) and Hammett indicators.Factors influencing the catalytic properties such as concentration of hydrochloric acid,heat-treated temperature,AlCl₃ loading and amount of catalyst were optimized according to the yield of aspirin.The catalytic properties of the catalysts and the support were compared before and after loading.The results show that the amount of AlCl₃ loading on ATP reached 1.18 mmol/g after ATP acidified with 10 mol/L HCl for 12 h at room temperature and then heat-treated under 300℃ for 2 h.The yield of aspirin catalyzed by AlCl₃/ATP reaches 92.5% when the dosage of the AlCl₃/ATP is 5% mass fraction of salicylic acid,which is higher than that of unloaded AlCl₃ and the support itself.The catalyst also exhibits excellent catalytic stability within 5 times reused.
- attapulgite,
- loading,
- AlCl₃,
- aspirin,
- catalytic properties
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Preparation and Characterization of Attapulgite Supported AlCl₃ Catalyst and Its Catalytic Properties