Metallic short fibers for liquid-phase oxidation reactions

The application of metallic short fibers (MSF) for the liquid phase oxidation of alcohols and the epoxidation of alkenes has been investigated. Screening of various MSF lead to the conclusion that Cu3Sn- and Cu64Ni28Mn7Fe1-fibers are the most promising candidates for oxidation reactions. Due to increased decomposition of H2O2 in presence of MSF containing Pt, Pd or Rh, lower yields were obtained with these catalysts. Oxidation reactions with the two above mentioned MSF are characterized by high selectivities for the oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones, respectively. Reactions are independent from reaction atmosphere and H2O2-dosage protocol, whereas parameters like solvent, temperature, and oxidant concentration had a significant influence.