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Citation: DAN You-Meng, MI Yuan-Zhu, TIAN Da-Ting. Preparation and Application of S₂O₈^2-/ZrO₂-Al₂O₃ Solid Superacid Catalysts[J]. Chinese Journal of Applied Chemistry, ;2001, 18(10): 840-842. shu

Preparation and Application of S₂O₈^2-/ZrO₂-Al₂O₃ Solid Superacid Catalysts

1.
Department of Chemical Engineering, Hubei Institute for Nationalities, Enshi 445000

Received Date: 5 December 2000
Available Online: 8 May 2001
Fund Project: 湖北省教育厅重点资助课题(2000A09009) (2000A09009)

A S₂O₈^2-/ZrO₂-Al₂O₃ type solid superacid catalyst was prepared from ZrOCl₂·8H₂O, AlCl₃·6H₂O and (NH₄)₂S₂O₈ by coprecipitation, maceration and calcination processes. Their crystal structures and acidities were determined by XRD and Hammett method, respectively. The activity of the catalyst was studied as function of Al₂O₃ content, calcination temperature and time in the esterification of acetic acid with butanol, and a conversion of 96.5% was obtained. The catalyst gave also higher yields in syntheses of ketals and acetals:cyclohexanone ethylene ketal(86.2%), acetophenone ethylene ketal(78.5%), acetylacetic ester ketal(88.5%), benzaldehyde glycol acetal(76.3%). The chemical structures of the products were confirmed by IR spectra.
- S₂O₈^2-/ZrO₂-Al₂O₃,
- solid superacid catalyst,
- esterification,
- acetalization,
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Preparation and Application of S₂O₈^2-/ZrO₂-Al₂O₃ Solid Superacid Catalysts