activation method for titanium silicalite, and its use in the oxidation with hydrogen peroxide

摘要

A method is described for improving the catalytic performances of titanium silicalite having formula I:$\[ {\text{xTiO}}_{\text{2}}{\text{· (1-x)SiO}}_{\text{2}} \]$    wherein x ranges from 0.0001 to 0.04 by the activation of the catalyst (I) in an aqueous medium with hydrogen peroxide, in the presence of precursors of fluoride ions or anionic species containing fluorine.;The activated catalyst (I) is preferably used in oxidation processes with hydrogen peroxide of organic substrates and, in particular, hydroxylation reactions of aromatic compounds, amoximation reactions of carbonyl compounds, epoxidation reactions of olefinic compounds and oxidation reactions of nitrogenated compounds.