Li Zhang, Hui-hui Liu, Gui-ying Li, Chang-wei Hu. Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 585-591. doi: 10.1088/1674-0068/25/05/585-591
Citation: Li Zhang, Hui-hui Liu, Gui-ying Li, Chang-wei Hu. Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 585-591. doi: 10.1088/1674-0068/25/05/585-591

Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide

doi: 10.1088/1674-0068/25/05/585-591
Funds:  This work was supported by the National Natu-ral Science Foundation of China (No.20502017 and No.21021001). Characterization of the catalyst from Analytic and Testing Center of Sichuan University are greatly appreciated.
  • Received Date: 2012-04-02
  • The direct hydroxylation of benzene to phenol catalyzed by activated carbon-supported Fe (Fe/AC) in acetonitrile using H2O2 as the oxidant was studied in a continuous flow reactor. Results showed that the continuous operation could obtain high phenol yield of 28.1%, coupled with the turnover frequency of 3 h-1, and high selectivity of 98% under mild condition. The catalyst was characterized by N2 adsorption/desorption, Boehm titration, X-ray photoelectron spectra, and Fourier transform infrared spectroscopy. It was observed that iron may interact with the carboxyl group forming iron-carboxylate like species, which act as the active phase. The apparent activation energy obtained by fitting an Arrhenius model to the experimental data was 13.4 kJ/mol. The reaction order was calculated to be about 1, 0.2 for benzene and 0.7 for H2O2.
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Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide

doi: 10.1088/1674-0068/25/05/585-591
Funds:  This work was supported by the National Natu-ral Science Foundation of China (No.20502017 and No.21021001). Characterization of the catalyst from Analytic and Testing Center of Sichuan University are greatly appreciated.

Abstract: The direct hydroxylation of benzene to phenol catalyzed by activated carbon-supported Fe (Fe/AC) in acetonitrile using H2O2 as the oxidant was studied in a continuous flow reactor. Results showed that the continuous operation could obtain high phenol yield of 28.1%, coupled with the turnover frequency of 3 h-1, and high selectivity of 98% under mild condition. The catalyst was characterized by N2 adsorption/desorption, Boehm titration, X-ray photoelectron spectra, and Fourier transform infrared spectroscopy. It was observed that iron may interact with the carboxyl group forming iron-carboxylate like species, which act as the active phase. The apparent activation energy obtained by fitting an Arrhenius model to the experimental data was 13.4 kJ/mol. The reaction order was calculated to be about 1, 0.2 for benzene and 0.7 for H2O2.

Li Zhang, Hui-hui Liu, Gui-ying Li, Chang-wei Hu. Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 585-591. doi: 10.1088/1674-0068/25/05/585-591
Citation: Li Zhang, Hui-hui Liu, Gui-ying Li, Chang-wei Hu. Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 585-591. doi: 10.1088/1674-0068/25/05/585-591

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