Selective catalytic oxidation of aniline to azoxybenzene over titanium silicate molecular sieves |
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Authors: | T Selvam A V Ramaswamy |
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Affiliation: | (1) National Chemical Laboratory, 411008 Pune, India |
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Abstract: | The oxidation of aniline using aqueous H2O2 and titanium silicates, TS-1 and TS-2 as catalysts was carried out in a batch reactor in the temperature range 333–353 K. TS-1 catalyzes aniline selectively to azoxybenzene and is superior to TS-2. The influence of different solvents, concentration of H2O2 and the catalyst in the reaction mixture on the conversion and product distribution has been studied. Acetonitrile is a suitable solvent in this reaction, while acetone is not. For the TS-1 catalyzed oxidation reaction,t-butyl hydroperoxide is not a suitable oxidant. At optimum conditions, a H2O2 efficiency of about 100% for aniline conversion is obtained with a selectivity of 97% to azoxybenzene in the product. |
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Keywords: | aniline oxidation titanium silicates selective oxidation of aniline catalytic oxidation with H2O2 oxidation with TS-1 and TS-2 |
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