Selective oxidation of 1,2-propanediol to lactic acid catalyzed by hydroxyapatite-supported Pd and Pd–Ag nanoparticles

1,2-Propanediol selective oxidation with molecular oxygen in presence of heterogeneous catalyst is one of the most nature friendly 1,2-propanediol conversion methods. This work demonstrates Au, Pt and Pd containing catalysts’ activity and selectivity in a 1,2-propanediol oxidation process. The main product of the 1,2-propanediol catalytic oxidation was lactic acid, by-products were acetic and formic acids. It was found that Au based catalysts are best for 1,2-propanediol oxidation in alkaline water solutions. The best result was achieved using the 4.8wt%Au/Al2O3catalyst: selectivity by lactic acid was 94% with 1,2-propanediol conversion 100% (c0(1,2-propanediol) = 0.3 mol/L, P(O2) = 6 atm, n (1,2-propanediol)/n (Au) = 500, t = 60°C, c0(NaOH) = 1.5 mol/L).

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Selective Oxidation of Styrene to Benzaldehyde by Co-Ag Codoped ZnO Catalyst and H2O2 as Oxidant

Advances in Materials Science and Engineering ◽

10.1155/2018/2716435 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 5

Author(s):

Abderrazak Aberkouks ◽

Ayoub Abdelkader Mekkaoui ◽

Brahim Boualy ◽

Soufiane El Houssame ◽

Mustapha Ait Ali ◽

...

Keyword(s):

Reaction Time ◽

Catalytic Oxidation ◽

Selective Oxidation ◽

High Selectivity ◽

Sol Gel ◽

Good Activity ◽

Molar Ratios ◽

Selective Catalytic Oxidation ◽

Sol Gel Process ◽

Ft Ir

Various ratio of Co-Ag supported on ZnO have been evaluated in the selective catalytic oxidation of styrene to benzaldehyde, using H2O2 as an oxidant. The catalysts were prepared by a sol-gel process and were characterized using XRD, FT-IR, TG-DTG, BET, and SEM/EDX. The performance of the prepared catalyst was investigated under different parameters such as solvent, temperature, substrate/oxidant molar ratios, reaction time, and doping percent. The Zn1−x−yAgxCoyO catalysts exhibit a good activity and a high selectivity towards benzaldehyde (95%) with the formation of only 5% of acetophenone.

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A nanohybrid self-assembled from exfoliated layered vanadium oxide nanosheets and Keggin Al13 for selective catalytic oxidation of alcohols

Dalton Transactions ◽

10.1039/c9dt04485j ◽

2020 ◽

Vol 49 (8) ◽

pp. 2559-2569 ◽

Cited By ~ 3

Author(s):

Shuang Wang ◽

Shuying Li ◽

Rui Shi ◽

Xinyu Zou ◽

Zhijuan Zhang ◽

...

Keyword(s):

Vanadium Oxide ◽

Catalytic Oxidation ◽

Selective Oxidation ◽

Self Assembly ◽

The Self ◽

Selective Catalytic Oxidation ◽

Oxidation Of Alcohols ◽

Self Assembled

A porous V2O5–Al13 nanohybrid based on the self-assembly of Keggin Al13 and exfoliated V2O5 nanosheets for selective oxidation of alcohols.

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Hollow ZSM-5 zeolite encapsulated Ag nanoparticles for SO2-resistant selective catalytic oxidation of ammonia to nitrogen

Separation and Purification Technology ◽

10.1016/j.seppur.2018.09.045 ◽

2019 ◽

Vol 209 ◽

pp. 1016-1026 ◽

Cited By ~ 61

Author(s):

Zhong Wang ◽

Qiang Sun ◽

Da Wang ◽

Zhe Hong ◽

Zhenping Qu ◽

...

Keyword(s):

Catalytic Oxidation ◽

Ag Nanoparticles ◽

Selective Catalytic Oxidation ◽

Oxidation Of Ammonia

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Water-Involved Methane Selective Catalytic Oxidation by Dioxygen over Copper-Zeolites

10.26434/chemrxiv.12715502 ◽

2020 ◽

Author(s):

Lanlan Sun ◽

Yu Wang ◽

Chuanming Wang ◽

Zaiku Xie ◽

Naijia Guan ◽

...

Keyword(s):

Catalytic Oxidation ◽

Selective Oxidation ◽

Density Functional ◽

Density Functional Theory Calculations ◽

High Catalytic Activity ◽

Oxidation Of Methane ◽

Selective Catalytic Oxidation ◽

Catalyst Temperature ◽

Temperature Programmed ◽

Space Time Yield

The selective oxidation of methane to methanol is a dream reaction of direct methane functionalization, which remains a key challenge in catalysis and a hot issue of controversy. Herein, we report the water-involved methane selective catalytic oxidation by dioxygen over copper-zeolites. At 573 K, a state-of-the-art methanol space-time yield of 543 mmol/molCu/h with methanol selectivity of 91 % is achieved with Cu-CHA catalyst. Temperature-programmed surface reactions with isotope labelling determine water as the dominating oxygen and hydrogen source of hydroxyl in methanol while dioxygen participates in the reaction <a></a><a>through reducing to water</a>. Spectroscopic analyses reveal the fast redox cycle of Cu2+-Cu+-Cu2+ during methane selective oxidation, which is closely related to the high catalytic activity of Cu-CHA. Density functional theory calculations suggest that both CuOH monomer and dimer in Cu-CHA can catalyze the selective oxidation of methane to methanol with Cu-OOH as the key reaction intermediate, and meanwhile, various copper sites undergo interconversion under reaction conditions.

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High-Selective Oxidation of n-Propanol to Propionic Acid Catalysed by Amino-Acid-Based Polyoxometalates

10.21203/rs.3.rs-141763/v1 ◽

2021 ◽

Author(s):

Minxue Liu ◽

Fengli Yu ◽

Bing Yuan ◽

Congxia Xie ◽

Shitao Yu

Keyword(s):

Amino Acid ◽

Catalytic Oxidation ◽

Propionic Acid ◽

Selective Oxidation ◽

High Capacity ◽

Primary Alcohols ◽

Reaction Conditions ◽

Green Route ◽

Selective Catalytic Oxidation ◽

High Efficient

Abstract Background: Propionic acid as a very valuable chemical is in high demand, and it is industrially produced via the oxo-synthesis of ethylene or ethyl alcohol and via the oxidation of propionaldehyde with oxygen. It is urgent to discover a new preparation method for propionic acid via a green route. Recyclable amino-acid-based organic-inorganic heteropolyoxometalates were first used to high-efficiently catalyse the selective oxidation of n-propanol to propionic acid with H2O2 as an oxidant.Result: A series of amino-acid-based heteropoly catalysts using different types of amino acids and heteropoly acids were synthesized, and the experimental results showed proline-based heteropolyphosphatotungstate [ProH]3PW12O40 exhibited excellent catalytic activity for the selective catalytic oxidation of n-propanol to propionic acid owing to its high capacity as an oxygen transfer agent and suitable acidity. Under optimized reaction conditions, the conversion of n-propanol and the selectivity of propionic acid reached 88% and 75%, respectively. Over four cycles, the conversion remained at ˃80%, and the selectivity was ˃60%. [ProH]3PW12O40 was also used to catalyse the oxidations of n-butanol, n-pentanol, n-hexanol, and benzyl alcohol. All the reactions had high conversions, with the corresponding acids being the primary oxidation product.Conclusions: Proline-based heteropolyoxometalate [ProH]3PW12O40 has been successfully used to catalyse the selective oxidation of primary alcohols to the corresponding carboxylic acids with H2O2 as the oxidant. The new developed catalytic oxidation system is mild, high-efficient, and reliable. This study provides a potential green route for the preparation propionic acid.

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