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Citation: HE Jie-Yu, LIAO De-Zhong. Catalytic Synthesis of Ketal over Zirconium Oxychloride[J]. Chinese Journal of Applied Chemistry, ;2005, 22(9): 1002-1006. shu

Catalytic Synthesis of Ketal over Zirconium Oxychloride

HE Jie-Yu ^, ,
LIAO De-Zhong

1.
Department of Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000

Corresponding author: HE Jie-Yu,
Received Date: 18 November 2004
Available Online: 15 March 2005

The acid property of zirconium oxychloride was characterized by means of DTA and FT-IR spectra of pyridine absorbed on the surface. Its acid strength was estimated with Hammett indictor. With ketalization between cyclohexanone and 2, 3-butanediol as a probe reaction, the optimum conditions were obtained. ZrOCl₂ catalytic activity in other ketalization was investigated and its catalytic activity was compared with those of other catalysts in ketalization. The results show that the catalyst has Broensted acid centers that could change the color of Hammett indictor (p-nitrophenylamine). The yield of cyclohexanone 2, 3-butanediol ketal is 96. 5% under the optimum conditions, and it shows excellent catalytic activity in other ketal synthesis. The catalyst could be recovered easily and the post-treatment was simple. No waste acid was discharged. The drawback brought by using conventional liquid inorganic acid to catalyze ketalization could be avoided. It is an environmental friendly catalyst to ketalization.
- zirconium oxychloride,
- cyclohexanone butanediol ketal,
- ketal synthesis,
- Brönsted acid
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