Effects of boehmite synthesis conditions on the epoxidation of styrene

İsmail Boz; Özge Kerkez

doi:10.1007/s11144-010-0177-z

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Reaction Kinetics, Mechanisms and Catalysis

Volume/Issue:: Volume 100: Issue 1

Effects of boehmite synthesis conditions on the epoxidation of styrene

Authors:

İsmail Boz

İsmail Boz Istanbul University Chemical Engineering Department, Faculty of Engineering Avcilar 34320 Istanbul Turkey

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Özge Kerkez

Özge Kerkez Istanbul University Chemical Engineering Department, Faculty of Engineering Avcilar 34320 Istanbul Turkey

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Pages:: 237–247

Online Publication Date:: 08 Apr 2010

Publication Date:: 01 Jun 2010

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s11144-010-0177-z

Keywords:: Epoxidation; Styrene; Boehmite; Urea–hydrogen peroxide

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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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Reaction Kinetics, Mechanisms and Catalysis

Print ISSN:: 1878-5190

Online ISSN:: 1878-5204

Reaction Kinetics, Mechanisms and Catalysis
Language	English
Size	B5
Year of Foundation	1974
Volumes per Year	1
Issues per Year	6
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	1878-5190 (Print)
ISSN	1878-5204 (Online)