Synthetic and mechanistic aspects of metal-catalysed epoxidations with hydroperoxides

“…The product from the oxidation of DBT with t-BuOCl was DBT sulfone, and t-BuOCl was transformed to t-butyl chlorite (t-BuCl). The mech anism involved a metal peroxide intermediate formed by reaction of an oxometal group with alkyl hydro peroxide 82) . A hypothetical mechanism of DBT oxi dation with t-BuOCl is shown in Scheme 4 31) .…”

Section: 3 Oxidation With T-butyl Hypochloritementioning

confidence: 99%

Development of Novel Nonhydrogenation Desulfurization Process — Oxidative Desulfurization of Distillate —

Qian

2008

J. Jpn. Petrol. Inst.

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This selective review discusses nonhydrogenation desulfurization processes, particularly oxidative desulfuriza tion, for the manufacture of ultra clean fuels. The environmental regulations for transportation fuels are becom ing more and more severe, and the statutory sulfur content in various fuels was reduced to below 10 ppm in 2005, and will be lower in the near future. However, there is considerable doubt whether conventional hydrodesulfur ization processes can provide fuels with sulfur content less than 5 ppm. This review describes recent advances in nonhydrogenation desulfurization processes, particularly oxidative desulfurization, as well as our latest research results. The review consists of three sections as follows. (I) The oxidation reactivities of various sulfurcontaining compounds present in fuels, oxidation and oxidative mechanisms for various oxidant-catalyst systems are introduced. (II) The oxidation of various practical fuels such as light gas oil, kerosene, and vacuum gas oil, and others are described; and the potential of various oxidative desulfurization processes for the fuels are evaluated. (III) Removal methods of oxidized sulfur compounds in various fuels are described.

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“…Complexes of various transition metals are used as the homogeneous catalysts in the oxidation of saturated and unsaturated hydrocarbons by molecular oxygen [7,8]. However, the separation and recycling of the homogeneous catalysts are, in general, very difficult, and therefore, production of toxic waste is unavoidable.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Metal Carbides on the Oxidation Processes of 1-Octene by Molecular Oxygen and tert-Butyl Hydroperoxide

Makota

Bulgakova

2012

ISRN Physical Chemistry

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The influence of metal carbides, TiC, VC, ZrC, Mo 2 C, TaC, and WC, on the liquid-phase oxidation processes of 1-octene by molecular oxygen and tert-butyl hydroperoxide was investigated. It was established that vanadium carbide is the most active in the oxidation process of 1-octene by molecular oxygen as well as in the tert-butyl hydroperoxide unproductive decomposition process in the hydroperoxide oxidation reaction. It was shown that there is a correlation among the activities of metal carbides in these processes.

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Synthetic and mechanistic aspects of metal-catalysed epoxidations with hydroperoxides

Cited by 322 publications

References 40 publications

VAPO as catalyst for liquid phase oxidation reactions. Part II: stability of VAPO-5 during catalytic operation

VAPO as catalyst for liquid phase oxidation reactions. Part II: stability of VAPO-5 during catalytic operation

Development of Novel Nonhydrogenation Desulfurization Process — Oxidative Desulfurization of Distillate —

The Influence of Metal Carbides on the Oxidation Processes of 1-Octene by Molecular Oxygen and tert-Butyl Hydroperoxide

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