Collect. Czech. Chem. Commun. 1995, 60, 451-456

Hydroxylation of Phenol over Ti-MCM-41 and TS-1

Kornelia Kulawika, Günter Schulz-Ekloffa, Jiří Rathouskýb, Arnošt Zukalb and Jiří Hadc

a Institut für Angewandte und Physikalische Chemie, Universität Bremen, 28359 Bremen, Germany
b J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8, Czech Republic
c Central Laboratories, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic


In the oxidation of phenol by hydrogen peroxide over titanium containing MCM-41 materials, practically only para isomers are formed. The exclusive para selectivity is proposed to be due to the different strength of adsorption for the para and ortho isomers influencing the overall reaction rate or the faster polymerization of the ortho product. The former mechanism is more probable.