Cb. Liu et al., A NOVEL CATALYST FOR CLEAN PRODUCTION OF DIPHENOLS - FERRIC TRISACETYLACETONATE MCM-41, Journal of chemical technology and biotechnology, 70(4), 1997, pp. 384-390
Ferric trisacetylacetonate has been deposited within the zeolite MCM-4
1 and the product characterized by XRD and IR. In water at pH 7 it cat
alyzes the oxidation of phenol by H2O2, giving 58% conversion in 1 h a
t 50 degrees C: products are catechol (66%), hydroquinone (27%) and be
nzoquinone (7%). Other oxidants and solvents are much less effective.
UV-VIS spectra suggest a radical substitution mechanism, and a polluti
on-free process for phenol hydroxylation is now possible.