Direct Oxidation of Benzene to Phenol Catalyzed by Vanadium Substituted Heteropolymolybdic Acid |
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Authors: | Ying Tang Jin Zhang |
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Institution: | (1) Department of Chemistry, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402168, P.R. China |
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Abstract: | Direct synthesis of phenol by hydroxylation of benzene with H2O2 over the vanadium-substituted heteropolymolybdic acid catalyst was investigated at 70 °C. H2O2 was used as an oxidant while 36 wt.% MeCO2H was employed as the solvent. After 100 min the selectivity for phenol was 93% and the yield of PhOH was 10.1%. The catalyst
was characterized by elemental analysis, thermal gravimetric analysis, infrared spectroscopy, u.v.–vis spectroscopy, X-ray
diffraction, and 31P-n.m.r. and 51V-n.m.r. techniques. The experimental conditions such as reaction temperature, the amounts of H2O2 and catalyst were explored. The as-prepared phenol could be separated by column chromatography and was characterized by infrared
and mass spectrometry. |
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