An Improvement on the Preparation of SO42-/ZrO2Superacid

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (4): 591.

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An Improvement on the Preparation of SO₄^2-/ZrO₂Superacid

MIAO Chang-Xi, CHEN Jian-Min, GAO Zi

Department of Chemistry, Fudan University, Shanghai, 200433

Received:1994-06-23 Revised:1994-10-28 Online:1995-04-24 Published:1995-04-24

Abstract

Abstract: The effects of preparative conditions on the properties of ZrO₂precursor and SO₄^2-/ZrO₂superacid were studied in detail by means of BET,XRD,flow Hammett indicator method, hemical analysis and butane isomerization reaction at low temperature. Under different conditions. the specific surface area of ZrO₂precursor may differ by a factor of 1.8,while the acid strength and the rate constant for butane isomerization at 20℃ of SO₄^2-/ZrO₂superacid may differ approximately by a factor of 1000 and 300, respectively. When appropriate preparative conditions are selected, the maximum specific surface area of ZrO₂obtained is 245 m²/g and the maximum acid strength and rate constant for butane isomerization at 20℃ are H₀≤-16. 0 and 15. 5×10^-3h^-1,respectively.

Key words: ZrO₂precursor.SO₄^2-/ZrO₂superacid, Specific surface area, Acid strength, Activity of butane isomerization

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MIAO Chang-Xi, CHEN Jian-Min, GAO Zi. An Improvement on the Preparation of SO₄^2-/ZrO₂Superacid[J]. Chem. J. Chinese Universities, 1995, 16(4): 591.

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An Improvement on the Preparation of SO₄^2-/ZrO₂Superacid

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