HALOGENATION OVER ZEOLITE CATALYSTS

Halogenation reactions over zeolite catalysts are reviewed. Product se lectivity depends on many reaction parameters like solvent, temperatur e and halogenating agent in addition to the composition and structure of the zeolite catalyst. Even though, zeolites, in general, are unstab le in the presence of the halogenoacids liberated during halogenation, recent developments, like the use of L-zeolite, may lead to the indus trial use of zeolites in halogenation reactions.