Halogenation over zeolite catalysts

Halogenation reactions over zeolite catalysts are reviewed. Product selectivity depends on many reaction parameters like solvent, temperature and halogenating agent in addition to the composition and structure of the zeolite catalyst. Even though, zeolites, in general, are unstable in the presence of the halogenoacids liberated during halogenation, recent developments, like the use of L-zeolite, may lead to the industrial use of zeolites in halogenation reactions.