Tungstophosphoric acid (H3PW12O40) catalyzed oxidation of organic compounds with NaBrO3

Shaabani, Ahmad; Behnam, Maryam; Rezayan, Ali Hossein

doi:10.1016/j.catcom.2008.12.059

Cited by 29 publications

(10 citation statements)

References 30 publications

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“…In (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) aqueous solution and different organic reagents. Soaking in the same volume of aqueous solution with pH range between 2-12 for 24 hours, as shown in Figure 3a, 3c, 3e, the PXRD peaks of the three compounds have no significant changes indicated that the three compounds were stable between the pH range of 2-12.…”

Section: Chemical Stability Studiesmentioning

confidence: 99%

“…[4,5] With the enhancement of awareness of environment protection, scientist are working on small corrosion performance, low price, high performance catalyst. [6][7][8][9] Polyoxometalates (POMs), as a class of nanosized metaloxo clusters composed of group VI (Mo and W) and group V (V, Nb and Ta) elements in their highest oxidation state, have received increasing attention owing to their aesthetically appealing structures and wide applications such as in the fields of magnetism, [10][11][12] catalysis, [13][14][15][16][17][18][19][20] and proton conduction. [22][23][24] Due to their strong acidity and fast multielectron transformation activity, POMs can be employed as acid, redox and bifunctional (acid and redox) catalyst for organic reactions.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of n-Butyl Lactate by Transition-Metal-Substituted Phosphotungstic Acid Salt

Ke¹

2018

SJC

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Fatty acid ester perfume occupied an important position in food industry. The characteristics of them were variety, easy synthesis and low price. They were widely used in daily flavor, edible flavor and industrial flavor. POMs were a kind of stong acid bifunctional mild environment-friendly catalysts, their drawback was excellent solubility and could not be reused. Here, series of transition-metal-substituted phosphotungstate K 6 [PW 11 O 39 M Ⅱ (H 2 O)] (M = Cu, Co, Ni) Lewis acid heterogeneous phase catalysts based on mono-lacunary-Keggin type K 7 [PW 11 O 39 ] were prepared by stereoselect-eve method, K 6 [PW 11 O 39 M Ⅱ (H 2 O)] (M = Cu, Co, Ni) were abbreviated as PW 11 M Ⅱ (H 2 O) (M = Cu, Co, Ni). They were characterized by FT-IR, PXRD and element analysis. The coordinating water of transition metal was Lewis acid catalytic sites after activated. When mole ratio of butanol and lactic acid was 2: 1, amount of PW 11 M Ⅱ (H 2 O) (M = Cu, Co, Ni) was 0.125 g, volume of cyclohexane was 15 mL, the reaction temperature was 105°C, reaction time was 2 h, conversion rate of n-butyl lactate were in order: 85.9%, 79.6%, 66.3%. Activity of PW 11 X (X = Cu, Co, Ni) had no obvious changes after three times recycling. In addition, magnetic studies indicate that antiferromagnetic interactions exist in the three compounds.

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Section: Chemical Stability Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of n-Butyl Lactate by Transition-Metal-Substituted Phosphotungstic Acid Salt

Ke¹

2018

SJC

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Section: (B) Oxidation Of Alkyl Arenes and Alcohols To The Correspondmentioning

confidence: 99%

“…In a similar manner, alkyl benzenes are regioselectively oxidized at the a-position to afford the corresponding ketones. 11 The oxidation of alcohols and alkyl benzenes to carbonyl compounds can also be performed by treatment with NaBrO 3 in ionic liquids. 12 The oxidation of sulfides with NaBrO 3 in the presence of a catalytic amount of ceric ammonium nitrate (CAN) supported on silica lead to excellent yields of the corresponding sulfoxides with no overoxidation to sulfones.…”

Section: (B) Oxidation Of Alkyl Arenes and Alcohols To The Corresponding Carbonyl Compoundsmentioning

confidence: 99%

Sodium Bromate: An Eco-Friendly Brominating and Oxidizing Reagent

Lü¹

2011

Synlett

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“…In this latter case, the recalcitrant sulfur compounds are oxidized to corresponding sulfoxides and sulfones, followed by distillation, liquid-liquid extraction, or solid-liquid adsorption removal procedures [47]. ODS is accomplished using t-butyl-hydroperoxide (TBHP) [48], superoxides [49], sodium bromate (NaBrO 3 ) [50] and hydrogen peroxide (H 2 O 2 ), along with mixtures of formic acid with H 2 O 2 [51][52][53][54] as primary oxidants. Hydrogen peroxide is the oxidant of choice for ODS, since it is a low cost, mild and environmentally benign reagent [55].…”

Section: Introductionmentioning

confidence: 99%

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

2019

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Recalcitrant sulfur compounds are common impurities in crude oil. During combustion they produce SOx derivatives that are able to affect the atmospheric ozone layer, increasing the formation of acid rains, and reducing the life of the engine due to corrosion. In the last twenty years, many efforts have been devoted to develop conventional hydrodesulfurization (HDS) procedures, as well as alternative methods, such as selective adsorption, bio-desulfurization, oxidative desulfurization (ODS) under extractive conditions (ECODS), and others. Among them, the oxidative procedures have been usually accomplished by the use of toxic stoichiometric oxidants, namely potassium permanganate, sodium bromate and carboxylic and sulfonic peracids. As an alternative, increasing interest is devoted to selective and economical procedures based upon catalytic methods. Heterogeneous catalysis is of relevance in industrial ODS processes, since it reduces the leaching of active species and favors the recovery and reuse of the catalyst for successive transformations. The heterogenization of different types of high-valent metal transition-based organometallic complexes, able to promote the activation of stoichiometric benign oxidants like peroxides, can be achieved using various solid supports. Many successful cases have been frequently associated with the use of mesoporous silicas that have the advantage of easy surface modification by reaction with organosilanes, facilitating the immobilization of homogeneous catalysts. In this manuscript the application of SBA-15 as efficient support for different active metal species, able to promote the catalytic ODS of either model or real fuels is reviewed, highlighting its beneficial properties such as high surface area, narrow pore size distribution and tunable pore diameter dimensions. Related to this topic, the most relevant advances recently published, will be discussed and critically described.

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Tungstophosphoric acid (H3PW12O40) catalyzed oxidation of organic compounds with NaBrO3

Cited by 29 publications

References 30 publications

Synthesis of n-Butyl Lactate by Transition-Metal-Substituted Phosphotungstic Acid Salt

Synthesis of n-Butyl Lactate by Transition-Metal-Substituted Phosphotungstic Acid Salt

Sodium Bromate: An Eco-Friendly Brominating and Oxidizing Reagent

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

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