Aerobic oxidation of alcohols by organically modified ruthenium hydroxyapatite

Opre, Z.; Ferri, Davide; Krumeich, Frank; Mallát, Tamás; Baiker, Alfons

doi:10.1016/j.jcat.2006.05.011

Cited by 66 publications

(46 citation statements)

References 51 publications

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“…After two hours of reaction, there was a conversion of 83% styrene with an epoxide selectivity of 62%. Opre et al [22,23] also studied the selective oxidation of alcohols with oxygen on cobalt promoted ruthenium-hydroxyapatite. Earlier, hydroxyapatites were used as supports in a many studies [24][25][26][27][28].…”

Section: +mentioning

confidence: 99%

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Singh¹,

Jonnalagadda²

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. Hydroxyapatite and a series of hydroxyapatite-type compounds containing Co, Fe or Sr were synthesized by co-precipitation and characterized by ICP-OES, BET, IR, Raman spectroscopy, powder and in-situ XRD, SEM, TEM, TPR, TPD and TGA. In-situ XRD and TGA studies indicate that the materials are able to maintain their structure at temperatures reaching 900 °C. The TPD data indicated that acidic sites of varying strengths were present in all the three hydroxyapatites. From SEM, the surface of the materials consisted of an agglomeration of irregular plate-like particles. The catalytic activity of the compounds was investigated in the oxidation of n-pentane and n-hexane. The conversion of the feed and composition of the products were largely influenced by changes in the temperature and flow rates. For n-pentane, the products consisted of lower hydrocarbons and oxygenated compounds, carbon oxides and very small amounts 1,3-pentadiene, furan and furfural. Low conversions of n-hexane were obtained for all the tested catalysts and selective products were the hexene isomers and some aromatics.

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Section: +mentioning

confidence: 99%

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Singh¹,

Jonnalagadda²

2012

Bull. Chem. Soc. Eth.

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“…For this purpose, oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) was used as a model reaction. Opre et al [9,10] have also used conversion of benzyl alcohol to benzaldehyde as a model reaction for oxidation of aromatic alcohols. The reaction was catalyzed by Ru-hydroxyapatite and Ru/Co-hydroxyapatite in toluene.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction was catalyzed by Ru-hydroxyapatite and Ru/Co-hydroxyapatite in toluene. Toluene is more frequently used as a solvent for alcohol oxidation [1,[9][10][11][12][13][14][15]. However, there is a report that manganese oxide can catalyze the conversion of toluene to benzoic acid, benzaldehyde, benzyl alcohol, and benzyl benzoate in solvent free conditions [23].…”

Section: Introductionmentioning

confidence: 99%

Liquid‐Phase Aerobic Oxidation of Benzyl Alcohol Catalyzed by Pt/ZrO₂

Ilyas

Sadiq

2007

Chem Eng & Technol

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The oxidation of benzyl alcohol by molecular oxygen in the liquid phase and catalyzed by Pt/ZrO2 using n-heptane as the solvent was studied. Pt/ZrO 2 was very active and 100 % selective for benzyl alcohol conversion to benzaldehyde. The catalyst can be separated by filtration and reused. No leaching of Pt or Zr into the solution was observed. Typical batch reactor kinetic data were obtained and fitted to the Langmuir-Hinshelwood, Eley-Rideal and Mars-van Krevelen models of heterogeneously catalyzed reactions. The Langmuir-Hinshelwood model was found to give a better fit. The rate-determining step was proposed to involve direct interaction of an adsorbed oxidizing species with the adsorbed reactant or an intermediate product of the reactant. H 2 O 2 was also proposed to be an intermediate product.n-Heptane was found to be an appropriate solvent in this reaction system.

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“…[14] The benefit of utilizing gallium oxide as a support has been attributed to a unique cooperative interaction between gold and surface Lewis acidic sites on the b-Ga 2 O 3 support. Herein, we report that gold nanoparticles supported on hydroxyapatite [15] possessing a unique amphoteric character are efficient multifunctional catalysts for rapid direct synthesis of imines and oximes from amines under mild conditions by a facile tandem oxidation-condensation pathway. Prior to this work, there have been no examples in the literature of recyclable multitask gold catalysts for the direct tandem synthesis of imines or oximes.…”

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Gold Supported on Hydroxyapatite as a Versatile Multifunctional Catalyst for the Direct Tandem Synthesis of Imines and Oximes

et al. 2009

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Aerobic oxidation of alcohols by organically modified ruthenium hydroxyapatite

Cited by 66 publications

References 51 publications

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Liquid‐Phase Aerobic Oxidation of Benzyl Alcohol Catalyzed by Pt/ZrO₂

Gold Supported on Hydroxyapatite as a Versatile Multifunctional Catalyst for the Direct Tandem Synthesis of Imines and Oximes

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Aerobic oxidation of alcohols by organically modified ruthenium hydroxyapatite

Cited by 66 publications

References 51 publications

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Synthesis of thermally stable metal substituted hydroxy apatites for the selective oxidation of light paraffins

Liquid‐Phase Aerobic Oxidation of Benzyl Alcohol Catalyzed by Pt/ZrO2

Gold Supported on Hydroxyapatite as a Versatile Multifunctional Catalyst for the Direct Tandem Synthesis of Imines and Oximes

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Liquid‐Phase Aerobic Oxidation of Benzyl Alcohol Catalyzed by Pt/ZrO₂