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Dual amphiphilic catalyst, paratungstate X and heteropoly acidic salts Y with two defects were synthesized. IR, UV, single crystal diffraction and TG were used to investigate the structure.  After the oxidation sweetening simulation of  diesel oil, it was found that  emulsion systems had good oxidation effect on organic sulfide of different types and concentration,  dibenzothiophene and its derivatives  were more easily oxidized than benzothiophene and its derivatives,  and the rate of oxidation reaction was accelerated as the sulphide concentration increased under the appropriate condition (50 ¡æ, O:S mole ration 5:1).
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In tihs experiment, we have synthesized two kinds of amphiphilic catalysts, paratungstate X and polyoxotungstate Y containing two defects, and characterized with IR, UV-vis, single crystal X-ray diffraction, and thermogravimetry. In oxidative desulfurization of the model diesel compound,   the emulsion system has good performance on different types of organosulfides with different concentrations at the optimal reaction conditions (50C, O/S = 5/1), and the dibenothiophene and derivatives are more readily oxided than the benzothiophene and derivatives, in the meantime, th oxidation reaction rate increases with the increase of the sulfur concentration.
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