Influence of the Structure and Composition of H3–2xMnxPMo12O40 AND (NH4)3–2xMnxPMo12O40 Heteropolycompounds on their Catalytic Properties in the Process of Cyclohexanone Oxidation with Hydrogen Peroxide

Abstract

Catalytic properties of two series of Keggin-type heteropolycompounds, H_3–2xMn_xPMo₁₂O₄₀ and (NH₄)_3–2xMn_xPMo₁₂O₄₀ (x = 0.25-1.5), have been studied in the process of oxidation of cyclohexanone and/or cyclohexanol to adipic acid, using 30% hydrogen peroxide, in the absence of organic solvent. The main products and by-products have been identified by means of GC-MS analysis. The highest yields of adipic acid are found in the case of H_1.5Mn_0.75PMo₁₂O₄₀ and (NH₄)₂Mn_0.5PMo₁₂O₄₀ compounds.