Oxidation of alcohols using H2O2 as oxidant catalyzed by AlCl3

Lei, Ziqiang; Wang, Ren-ren

doi:10.1016/j.catcom.2007.08.012

Cited by 23 publications

(24 citation statements)

References 16 publications

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“…There is a current significant scientific effort concerning the development of cleaner catalytic selective oxidation processes using hydrogen peroxide,1 molecular oxygen2 and compressed air3 to substitute stoichiometric oxidants at industrial scale. In particularly, hydrogen peroxide (H 2 O 2 ) is an oxidising agent with a high active oxygen content that produces only water as a co‐product.…”

Section: Methodsmentioning

confidence: 99%

Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts

2015

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Alcohol oxidation with 100 % selectivity to the aldehyde product (versus acid formation) is achieved at mild conditions by a tandem-type system where the intermediate species of hydrogen peroxide formation from an O 2 /H 2 mixture are formed and utilised directly over Au-Pd/Ti-NT catalysts. In situ reaction of the intermediate species minimises the parallel decomposition of hydrogen peroxide into water, overcoming one of the limitations on the use of hydrogen peroxide as a green oxidant.There is a current significant scientific effort concerning the development of cleaner catalytic selective oxidation processes using hydrogen peroxide,[1] molecular oxygen [2] and compressed air [3] to substitute stoichiometric oxidants at industrial scale. In particularly, hydrogen peroxide (H 2 O 2 ) is an oxidising agent with a high active oxygen content that produces only water as a co-product. However, the large scale use of H 2 O 2 still presents a series of challenges associated with waste production from its anthraquinone autoxidation synthesis and safe transport and storage. Consequently, there has been continuing interest in the local direct synthesis of hydrogen peroxide from H 2 and O 2 .[4] We have recently reported the high activity of Au-Pd nanoparticles supported on titanate nanotubes (Ti-NT) for the direct synthesis of H 2 O 2 with productivities in excess of 10 kmol H 2 O 2 kg metal À1 h À1. The high activity of these nanostructured catalysts is attributed to a very small metal particle size (< 1.5 nm) and high dispersion afforded by its high metal-support interaction and physical constraints created by the high aspect ratio morphology of the support.[5] Despite the potential of this catalytic system, the hydrogen utilisation is compromised by the parallel decomposition of H 2 O 2 to water and oxygen. To avoid this problem, integration of the in situ generation and utilisation of hydrogen peroxide is presented as an efficient way of reducing cost, avoiding intermediate purification or separation steps, and transportation and storage of H 2 O 2 .[6] Ultimate integration would be achieved by aligning the rate of H 2 O 2 production and consumption, ideally with the use of only a single catalyst for both reaction steps.The current development of gold-based catalysts for oxidation reactions [7] and reported outstanding selectivities [7b, 8] has prompted the use of Au-Pd on titanate nanotubes as a catalyst for the tandem generation of H 2 O 2 and in situ oxidation reactions. An interesting oxidation reaction is the selective oxidation of o-hydroxy benzylalcohol (salicylic alcohol) to o-hydroxy benzaldehyde (salicylic aldehyde), which is an intermediate compound for the synthesis of pesticides, polymers, perfumes, etc., [9] and can serve as a model reaction for selective oxidation in aqueous phase. Several patents have covered this reaction [10] based on processes using palladium and platinum catalysts and promoters (bismuth, lead, tellurium, etc.). The current main limitation is the formation of by-products that a...

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Section: Methodsmentioning

confidence: 99%

Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts

2015

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“…The use of aqueous hydrogen peroxide as an oxidant is very attractive, since it is environmentally friendly and easy to handle. 5 A variety of different catalytic systems for the hydrogen peroxide-promoted oxidation of alcohols have been developed, e.g., tungsten-based polyoxometalate catalyst, 6,7 Lewis acid iron aluminum chloride, 8 dinuclear Mn (IV) complexes, 9 metal-organic gel-based on Fe(III) 10 and CuCl 2 bifunctional ionic liquid. 11 Recently, Maity et al described an efficient aqueous system to perform selective oxidation of primary and secondary alcohols using platinum nanoparticules as catalyst.…”

Section: Introductionmentioning

confidence: 99%

Role of vanadium and pyridine in heteropolycompounds for selective oxidation of alcohols with hydrogen peroxide

et al. 2013

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and a hybrid pyridine-modified heteropolyacid with Keggin structure for selective oxidation of alcohols to ketones or aldehydes using aqueous hydrogen peroxide and acetonitrile as solvent. Performance of these different catalysts in 1-phenylethanol oxidation was studied. Influence of reaction temperature, amount of catalyst and hydrogen peroxide and reaction time on the yield of acetophenone was investigated to obtain optimal reaction conditions. Oxidation ability of the catalyst depended on the number of vanadium atoms present in the Keggin ion and to a lesser extent on pyridine substitution in the Keggin secondary structure. In order to explore the applicability of the method for selective oxidation of alcohols to ketones or aldehydes, various alcohols were investigated according to the general procedure using hybrid pyridine-modified heteropolyacid.

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“…Thus, today, there is a strong interest in finding alternative methods that are both more economically efficient and more environmentally friendly. One possible solution is the use of molecular oxygen or hydrogen peroxide catalyzed by a transition metal compound . Use of molecular oxygen generates considerable amounts of inorganic waste and is therefore environmentally not very attractive.…”

Section: Introductionmentioning

confidence: 99%

Facile Method for the Synthesis of Phosphomolybdic Acid Supported on Zirconia–Ceria Mixed Oxide and Its Catalytic Evaluation in the Solvent-Free Oxidation of Benzyl Alcohol

Mallick

Rana

Parida

2012

Ind. Eng. Chem. Res.

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A series of phosphomolybdic acid (5−20 wt % PMA) promoted zirconia−ceria (ZrO 2 −CeO 2 ) mixed oxides were synthesized by an impregnation method and characterized by XRD, nitrogen adsorption/desorption, UV−vis DR spectroscopy, TPR/TPD, and 31 P MAS NMR spectroscopy. NMR spectra revealed that the catalyst retained the Keggin structure of PMA even after calcination at 500 °C. The catalysts were screened for the solvent-free liquid-phase oxidation of benzyl alcohols using hydrogen peroxide as the oxidizing agent. The sample of 15 wt % PMA/ZrO 2 −CeO 2 showed 85% conversion and 96% selectivity to the corresponding aldehydes.

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Oxidation of alcohols using H2O2 as oxidant catalyzed by AlCl3

Cited by 23 publications

References 16 publications

Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts

Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts

Role of vanadium and pyridine in heteropolycompounds for selective oxidation of alcohols with hydrogen peroxide

Facile Method for the Synthesis of Phosphomolybdic Acid Supported on Zirconia–Ceria Mixed Oxide and Its Catalytic Evaluation in the Solvent-Free Oxidation of Benzyl Alcohol

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Oxidation of alcohols using H2O2 as oxidant catalyzed by AlCl3

Cited by 23 publications

References 16 publications

Selective Oxidation of Salicylic Alcohol to Aldehyde with O2/H2 using Au‐Pd on Titanate Nanotubes Catalysts

Selective Oxidation of Salicylic Alcohol to Aldehyde with O2/H2 using Au‐Pd on Titanate Nanotubes Catalysts

Role of vanadium and pyridine in heteropolycompounds for selective oxidation of alcohols with hydrogen peroxide

Facile Method for the Synthesis of Phosphomolybdic Acid Supported on Zirconia–Ceria Mixed Oxide and Its Catalytic Evaluation in the Solvent-Free Oxidation of Benzyl Alcohol

Contact Info

Product

Resources

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Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts

Selective Oxidation of Salicylic Alcohol to Aldehyde with O₂/H₂ using Au‐Pd on Titanate Nanotubes Catalysts