Oxidation of aromatic substrates in water/goethite slurry by means of hydrogen peroxide

The oxidation of aromatic derivatives in aqueous goethite slurry at varying catalyst load and hydrogen peroxide concentration is investigated. For adopted experimental conditions only the compounds containing two adjacent –OH groups or one –OH and one –NH2 groups are oxidized. A model previously developed for the oxidation of 3,4-dihydroxybenzoic acid has been satisfactorily used to describe the oxidation of 1,2-benzenediol (catechol), 2-aminophenol and 2,3-dihydroxybenzoic acid.