ChemInform Abstract: Surface‐Mediated Reactions. Part 8. Oxidation of Sulfides and Sulfoxides with tert‐Butyl Hydroperoxide and OXONE.

Kropp, Paul J.; Breton, Gary W.; Fields, John D.; Tung, Jesse C.; Loomis, Brian R.

doi:10.1002/chin.200032050

Cited by 7 publications

(8 citation statements)

References 1 publication

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“…Heterogeneous catalysts promote oxidation reactions via attracting oxygen from oxidants, such as TBHP (tert-BuO 2 H) and HP (H 2 O 2 ) [39,40]. In the last decade, TBHP has been used as oxidant for various oxidation reactions such as alkyl benzene and benzyl alcohol oxidation.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Heterogeneous Metal Catalysts for Oxidation Reactions

Ali

Rahman

Sarkar

et al. 2014

Journal of Nanomaterials

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Oxidation reactions may be considered as the heart of chemical synthesis. However, the indiscriminate uses of harsh and corrosive chemicals in this endeavor are threating to the ecosystems, public health, and terrestrial, aquatic, and aerial flora and fauna. Heterogeneous catalysts with various supports are brought to the spotlight because of their excellent capabilities to accelerate the rate of chemical reactions with low cost. They also minimize the use of chemicals in industries and thus are friendly and green to the environment. However, heterogeneous oxidation catalysis are not comprehensively presented in literature. In this short review, we clearly depicted the current state of catalytic oxidation reactions in chemical industries with specific emphasis on heterogeneous catalysts. We outlined here both the synthesis and applications of important oxidation catalysts. We believe it would serve as a reference guide for the selection of oxidation catalysts for both industries and academics.

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Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Heterogeneous Metal Catalysts for Oxidation Reactions

Ali

Rahman

Sarkar

et al. 2014

Journal of Nanomaterials

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“…These studies afforded insights into the mechanism of surface-mediated processes. It was found that oxidation of sulfides or sulfoxides by TBHP/silica gel occurs at least predominantly via nucleophilic attack by the substrate molecule on the hydroperoxide, which is activated by being bound to isolated silanol sites on the silica gel surface [271].…”

Section: Other Catalystsmentioning

confidence: 99%

Non-Metal and Enzymatic Catalysts for Hydroperoxide Oxidation of Organic Compounds

Młochowski¹

2011

TOCATJ

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Oxidation of different groups of organic compounds, with hydroperoxides catalyzed by non-heavy metal containing low-molecular-weight compounds and enzymes is reviewed. This article is concentrated mainly on the hydrogen peroxide and tert-butyl hydroperoxide, however other less common hydroperoxides are also mentioned. Since hydroperoxides themselves are inactive toward most of the organic substrates, in situ activation of the oxidant is necessary. For this purpose various activators have been applied in stoichiometric or catalytic amounts. The carboxylic acids, nitriles, amides and urea are representative for the first category. The organocatalysts such as-halo carbonyl compounds, ketones, imines, iminium salts, nitroxyl radicals and polyaminoacids, selenium compounds and enzymes are presented. They are involved in oxygen, and electron transfer processes whose mechanisms are briefly discussed, and their applications in laboratory and industrial synthesis are indicated.

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“…All forms of silica contain the Si−O bone, 44 a kind of stable Lewis acid site. Taking the advantages of the rich porous structure, high chemical stability, abundant surface hydroxyl groups, and low cost, silica gels have been widely used as adsorbents, 45,46 supporting materials, 47,48 and catalysts 49,50 in various applications, such as adsorptive removal of water contaminants, chromatographic analyses, etc. Zhang and Wang 51 reported a core−shell microsphere catalyst incorporated with a solid silica core and mesoporous shell for dibenzothiophene oxidation, which yielded a 98% of DBT conversion rate from simulated oil.…”

Section: Introductionmentioning

confidence: 99%

“…With the presence of isolated and associated silanol sites on the silica surface, silica can be used to mediate the oxidation of sulfides and sulfoxides with (CH 3 ) 3 COOH and OXONE, and result in reasonably high selectivity to sulfoxides. 49 Stanger and Angelici 50 reported the silica-catalyzed oxidation of DBT and 4,6-DMDBT by TBHP. It appears that the silica materials have the prospect of oxidative desulfurization, but the more accurate mechanism of oxidative desulfurization needs to be further explored.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Deep Desulfurization of Real Diesel Using Two-Layer Silica Gels under Mild Conditions

Miao

Dai

et al. 2019

Energy Fuels

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The objective of this work is to explore ultra-deep oxidative desulfurization (ODS) of real diesel using two-layer silica gels as both the guard adsorbent and oxidation catalyst under mild conditions. A series of commercial silica gels were screened for ODS in the presence of cumene hydrogen peroxide, with the dibenzothiophene conversion varying diversely from 1.2 to 99.8%. The best silica gel SC-2 is capable of treating >375 cm3 of simulated diesel per gram of catalyst with ∼3 ppmw S at 373 K. Fairly trace Ti species of ∼0.02 wt % in silica gel was detected and quantified by inductively coupled plasma, which was identified as the major Lewis acidic species correlating to the high ODS conversion. Moreover, the effects of real diesel composition, including model aromatics, olefin, oxygen fuel additive, and trace organonitrogen compounds, on ODS using silica gel were investigated, where nitrogen compounds, such as indole, were identified as major inhibitors, even at a low concentration of 150 ppmw. Accordingly, guard adsorbents were investigated for adsorptive denitrogenation prior to ODS, the N-capacity followed the order of SC-2 ∼ AC > Al2O3 > 13X. The layered-bed combination for deep desulfurization was optimized to be 5 and 2.5 mg/mL of SC-2, respectively, as the guard adsorbent and oxidation catalyst. The matrix is capable of processing deep-desulfurized diesel below 10 ppm with the total sulfur capacity of up to 4.2 mg-S/g. The process using two-layer commercial silica gel beds provides a new path for ultra-deep oxidative desulfurization of diesel under mild conditions.

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ChemInform Abstract: Surface‐Mediated Reactions. Part 8. Oxidation of Sulfides and Sulfoxides with tert‐Butyl Hydroperoxide and OXONE.

Cited by 7 publications

References 1 publication

Heterogeneous Metal Catalysts for Oxidation Reactions

Heterogeneous Metal Catalysts for Oxidation Reactions

Non-Metal and Enzymatic Catalysts for Hydroperoxide Oxidation of Organic Compounds

Ultra-Deep Desulfurization of Real Diesel Using Two-Layer Silica Gels under Mild Conditions

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