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Effects of boehmite synthesis conditions on the epoxidation of styrene

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Abstract

The influence of synthesis conditions on the properties of nanocrystalline boehmite catalysts was studied for styrene epoxidation reaction in liquid phase. At hydrothermal synthesis of boehmite, effects of pH, aging time and precursor aluminum salts were studied by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and total surface area. Characterization results showed that boehmite samples were in the nanosize range and single-phase with high crystallinity. Styrene epoxidation reaction in liquid phase was performed over boehmite catalysts at 80 °C in ethanol, using 30% aqueous hydrogen peroxide solution and urea + 30% aqueous hydrogen peroxide solution as oxidants. The progress of the reaction was followed by gas chromatography (GC). Higher styrene conversion and higher epoxide selectivities were achieved when urea was mixed with H2O2 solution. Boehmite catalyst samples aged for 8 h resulted in higher epoxide selectivities.

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Acknowledgement

This work was supported by Research Fund of the Istanbul University. Project number T-1398.

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  1. Chemical Engineering Department, Faculty of Engineering, Istanbul University, Avcilar, 34320, Istanbul, Turkey

    İsmail Boz & Özge Kerkez

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  1. İsmail Boz
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  2. Özge Kerkez
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Correspondence to İsmail Boz.

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Boz, İ., Kerkez, Ö. Effects of boehmite synthesis conditions on the epoxidation of styrene. Reac Kinet Mech Cat 100, 237–247 (2010). https://doi.org/10.1007/s11144-010-0177-z

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