Homogeneous Liquid Phase Oxidation of Methacrolein. I.

Ishikawa, Toshio; Tezuka, Takashi; Kaneko, Katsumi; Hayakawa, T.; Kin, Yuzo

doi:10.5650/jos1956.15.516

Cited by 2 publications

(1 citation statement)

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“…The selective oxidation reaction of MAL was studied as early as the 1930s, when salts of Cu, Ni, and Mn were screened as catalysts in a benzene-containing system operated at 50 °C . Metal oxides of copper, molybdenum, and iron were then introduced into the gas-phase catalytic oxidation reaction but suffered from low reactivity. , Mo-based heteropoly compounds were then proposed by researchers for their outstanding acidity and redox properties and were successfully applied to industrial production …”

Section: Introductionmentioning

confidence: 99%

Selective Methacrolein Oxidation Catalyzed with Heteropoly Compounds: Effect of the Oxidation State Modulated with Hydrogen Pretreatment

Yang

Chen

et al. 2022

Ind. Eng. Chem. Res.

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The chemical state of catalysts is a vital factor affecting their catalytic performance. Herein, a method for controllable modification of the chemical state was proposed for the heteropoly catalyst in the methacrolein oxidation reaction to methacrylic acid by means of hydrogen pretreatment. The inherent relationship between the chemical state and the catalytic performance of the Keggin catalyst was systematically investigated. The changes in structure and element valence induced by hydrogen pretreatment were characterized with various methods, including XRD, FTIR, UV, Raman, SEM, O2-TPD, XPS, and ESR spectra. The pretreatment conditions were optimized on a fixed-bed tubular reactor, and the favored chemical state of the catalyst was obtained. This report provides an effective approach to activating the Keggin catalyst for oxidation reactions.

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