A green method of adipic acid synthesis: Organic solvent- and halide-free oxidation of cycloalkanones with 30% hydrogen peroxide

  • Usui Y
  • Sato K
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Cyclohexanone and cyclohexanol are oxidized to adipic acid in high yield with aqueous 30% HO in the presence of HWO as a catalyst under organic solvent- and halide-free conditions. It is important that no solvent is used in order to achieve high reactivity in this heterogeneous reaction. The use of -butyl alcohol or dioxane as a solvent (homogeneous conditions) significantly decreases the yield of adipic acid from cyclohexanone. This ketone-to-dicarboxylic acid conversion is applicable to five- to eight-membered cyclic ketones. No operational problems are foreseen for a large-scale version of this green process.

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  • Yoko Usui

  • Kazuhiko Sato

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