Vapor-Phase Oxidation of Ethyl Lactate to Pyruvate over Various Oxide Catalysts

Sugiyama, Shigeru; Shigemoto, Naoya; Masaoka, N.; Suetoh, S.; Kawami, H.; Miyaura, K.; Hayashi, Hiromu

doi:10.1246/bcsj.66.1542

Cited by 31 publications

(19 citation statements)

References 9 publications

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“…This is a green and atom-economical reaction route which has received extensive attention from the scientific and industrial circles. This highly atom-efficient catalytic oxidative dehydrogenation process includes liquid and vapor phase strategies [5,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

High-Performance Vapor-Phase Selective Oxidation of Ethyl Lactate to Ethyl Pyruvate over SiO2 Supported PMoVNb Oxides

et al. 2020

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This paper describes the application of P-Mo-V-Nb/SiO 2 catalysts for the selective oxidation of ethyl lactate (EL) to ethyl pyruvate (EP). The P-Mo-V-Nb/SiO 2 catalysts exhibit superior performance for EP selectivity than the corresponding samples of binary V-Nb/SiO 2 ternary P-Mo-V/SiO 2 and P-Mo-Nb/SiO 2 catalysts at same temperatures. The origin of high EP selectivity of the P-Mo-V-Nb/SiO 2 catalysts is explored and attributed to the synergistic effect of P, Mo, V, and Nb mixed oxides presented on the surface of the catalyst. The highly dispersive sites separated active species under the action of phosphorus, suppressing over oxidation and improving the selectivity. The existence of MoO 3 to provide higher oxidation for catalyst. The redox cycle of V and Nb oxides could be completed through electron transfer between lattice oxygen and metal cations. Moreover, the weak acidity of catalyst surface is favorable to avoid the decarboxylation reaction to target a high selectivity of EP. Therefore, the P-Mo-V-Nb/SiO 2 catalyst obtained the maximum yield of 91.8% with a selectivity of 93.8% and a conversion of 99.0% simultaneously at 280 • C.

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Section: Introductionmentioning

confidence: 99%

High-Performance Vapor-Phase Selective Oxidation of Ethyl Lactate to Ethyl Pyruvate over SiO2 Supported PMoVNb Oxides

et al. 2020

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“…Molybdena and various binary oxides containing MoO 3 and SnO 2 , Fe 2 O 3 or TeO 2 were not only active but also selective in the synthesis of ethyl pyruvate from ethyl lactate [34]. Under optimized conditions, ethyl pyruvate was astonishingly stable and formation of the major byproduct acetaldehyde became dominant only at high temperatures.…”

Section: Reactantmentioning

confidence: 99%

Oxidation of Alcohols with Molecular Oxygen

Mallát

Baiker

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Oxidation in the Gas Phase Metals Oxides Phosphates Zeolites Oxidation in the Liquid Phase Platinum‐Group Metals Gold Oxides Molecular Sieves Hydrotalcites Phosphates and Apatites Heterogenized Metal Complexes Summary

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“…The substrate is vaporized in this process. This process has been improved with the development of various catalysts, for example, binary oxides containing molybdenum such as Fe 2 O 3 -MoO 3 and TeO 2 -MoO 3 [5], vanadium oxide species [6], and iron phosphate [7][8][9]. Although this process can be used to obtain high productivity of pyruvate from lactate, the process requires a reaction temperature of 473-573 K to vaporize lactate as a starting material, leading to a large running cost.…”

Section: Introductionmentioning

confidence: 99%

Enhanced production of ethyl pyruvate using gas–liquid slug flow in microchannel

Yasukawa¹,

Ninomiya²,

Ooyachi³

et al. 2011

Chemical Engineering Journal

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a b s t r a c tThe use of a gas-liquid slug flow in a microreactor has several advantages such as a large surface area for contacting gas and liquid phases and circulation flow inside slugs. These advantages accelerate the mass transfer between the two phases, resulting in a high concentration of dissolved gas. The enhanced mass transfer is useful in carrying out liquid phase oxidation that uses oxygen gas as the oxidizing agent. The gas-liquid slug flow in a microreactor system is applied to the oxidation of ethyl lactate using an oxyvanadium species for producing ethyl pyruvate. The reactor system includes two T-shaped micromixers: one for mixing the substrate with a catalyst solution and the other for generating slug flow by the addition of oxygen. The oxidation reaction proceeds right after the slug flow is generated in the second mixer, because the substrate and the catalyst mix rapidly in the first micromixer. Moreover, a high concentration of dissolved oxygen due to improved mass transfer in slug flow increases the oxidation reaction rate. Therefore, compared to a batch reaction, the synthesis using slug flow provides high yields of ethyl pyruvate per unit time and achieves satisfactory productivity at the reaction temperature of 323 K, which is lower than that employed in conventional syntheses. The proposed system enables the production of ethyl pyruvate using a simple reactor setup with reduced energy consumption.

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Vapor-Phase Oxidation of Ethyl Lactate to Pyruvate over Various Oxide Catalysts

Cited by 31 publications

References 9 publications

High-Performance Vapor-Phase Selective Oxidation of Ethyl Lactate to Ethyl Pyruvate over SiO2 Supported PMoVNb Oxides

High-Performance Vapor-Phase Selective Oxidation of Ethyl Lactate to Ethyl Pyruvate over SiO2 Supported PMoVNb Oxides

Oxidation of Alcohols with Molecular Oxygen

Enhanced production of ethyl pyruvate using gas–liquid slug flow in microchannel

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