Selective Oxidation of Toluene to Benzaldehyde Catalyzed by Co/Al Hydrotalcite-like Materials in Liquid Phase

doi:10.3724/SP.J.1095.2014.30364

Chinese Journal of Applied Chemistry

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Selective Oxidation of Toluene to Benzaldehyde Catalyzed by Co/Al Hydrotalcite-like Materials in Liquid Phase

CAO Mingming, ZHOU Weiyou, ZHONG Xia, SUN Fu′an, HE Mingyang^*

(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

Received:2013-07-19 Revised:2013-09-08 Published:2014-05-10 Online:2014-05-10
Contact: Mingyang

Abstract

Abstract: Co/Al layered double hydroxides(LDHs) with different Co/Al ratios（Cox/Al-LDHs， x=2， 3 and 4） and their calcined samples（Cox/Al-LDOs） were prepared and characterized by XRD, FT-IR, BET and ICP techniques. These catalysts were studied for selective oxidation of toluene to benzaldehyde. The results indicate that under the optimized condition(0.6 mL(5.43 mmol) of toluene, 100 mg of Co4/Al-LDO, 21.7 mmol of tert-butyl hydroperoxide（TBHP）, 10 mL of acetonitrile, reaction temperature 70 ℃, and reaction time 9 h), the conversion of toluene is 8.2% and the selectivity of benzaldehyde is 77.6%. Repeated runs indicate that these catalysts are stable up to 7 cycles without obvious change of the catalytic activity and selectivity.

Key words: hydrotalcite-like compounds, toluene, selective oxidation, benzaldehyde

CLC Number:

O625

CAO Mingming, ZHOU Weiyou, ZHONG Xia, SUN Fu′an, HE Mingyang*. Selective Oxidation of Toluene to Benzaldehyde Catalyzed by Co/Al Hydrotalcite-like Materials in Liquid Phase[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30364.

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Selective Oxidation of Toluene to Benzaldehyde Catalyzed by Co/Al Hydrotalcite-like Materials in Liquid Phase

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