Oxidation of coals in liquid phases. VII. Oxidation of oxygen-containing model compounds of coal by oxygen in concentrated sodium hydroxide solutions.

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概要

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• Oxidation of 26 model compounds of low-ranked coal was performed to study the formation mechanisms of oxalic acid from coal. A mixture of 0.02 mol of the model compound, 4–60 g of NaOH, and 50 g of water was placed in a 300 cm<SUP>3</SUP> autoclave and oxidized at 523 K and <I>P</I><SUB>O<SUB>2</SUB></SUB>=5 MPa for 120 min. Acetic acid was produced from phenols within 15 min and oxidized selectively to oxalic acid. The yield ratio(yield of oxalic acid(%)/yield of CO<SUB>2</SUB> (%)) from most of the model compounds was higher than 1. These phenomena agreed well with those of low-ranked coal under the same oxidation conditions. The overall reaction rates, yields of oxalic acid, and yield ratios increased rapidly with an increasing concentration of NaOH as in the oxidation of coal. This behavior can be explained resonably well by an alkali-catalyzed oxidation mechanism regarding organic substances.

• 公益社団法人 日本化学会の論文

著者

• Okabe Taijiro

  Department Of Medicine And Bioregulatory Science (third Department Of Internal Medicine) Graduate Sc

• OKUWAKI Akitsugu

  Department of Applied Chemistry, Graduate School of Engineering, Tohoku University

• Amano Akira

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Furuya Hirohide

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Uwabe Ryoichi

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Sutoh Nobuyuki

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Okabe Taijiro

  Department of Applied Chemistry, Faculty of Engineering

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