Zeolites have been the focus of intensive activity and growth in applications over the past 25 years in ion exchange, in adsorp­ tion and in catalytic process technology. Beginning with the syn­ thetic zeolites A,X and Y, continuing into the emerging ZSM series, and including selected natural zeolites, applications span the range from large-scale purification and separation to such major petroleum and petrochemical processes as catalytic cracking and aromatics alkylation. The future promises several new areas of signiciant use as our energy resource base is expanded. As a result, a NATO Advanced Study Institute on Zeolites was held in Alcabideche, Portugal, May 1-12, 1983. Its purpose was to summarize the state-of-the-art in zeolite science and technology, with particular emphasis on recent developments. This summary is intended to complement presentations of the latest research results at the 1983 International Zeolites Association meeting in .Reno, Nevada - USA. Both the fundamentals concepts and industrial applications are addressed in the lectures of the Institute. Individual chapters cover historical development, structure, crystallography and synthesis techniques. Basic principles of adsorption, diffusion, ion exchange and acidity are reviewed. A section on catalysis addresses shape selectivity, transition metals, bifunctional catalysis and "methanol­ to-gasoline". Included in the section on industrial applications are chapters on reactor and adsorber design, catalytic cracking, xylene and n­ -paraffins isomerization, as well as ion exchange and adsorption.

I. History, structure and synthesis.- Molecular sieve zeolite technology: the first twenty five years.- Zeolite structure.- Zeolite crystallography.- Synthesis of zeolites, an overview.- Study on the mechanism of crystallization of zeolites A, X and Y.- II. Physical characterization and sorption fundamentals.- The physical characterization of zeolites.- Structural characterization of zeolites by high resolution magic-angle-spinning solid state29Si-NMR spectroscopy.- Multinuclear solide-state NMR study of mordenite crystallization.- Sorption by zeolites: I - Equilibria and energetics.- Sorption by zeolites: II - Kinetics and diffusivities.- III. Catalysis.- Unifying principles in zeolite chemistry and catalysis.- Acidic Catalysis with zeolites.- Molecular shape-selective catalysis by zeolites.- Transition metal exchanged zeolites: physical and catalytic properties.- Zeolite bifunctional catalysis.- IV. Industrial applications.- Design aspects of catalytic reactors and adsorbers.- Engineering aspects of catalytic cracking.- Conversion of methanol to gasoline over zeolite catalysts I Reaction mechanisms.- Conversion of methanol to gasoline over zeolite catalysts II Industrial processes.- Use of platinum HY zeolite and platinum H mordenite in the hydroisomerization of n-hexane.- Zeolites as catalysts in xylene isomerization processes.- Ion exchange separations with molecular sieve zeolites.- Selective adsorption processes: N-Iself.- Pressure swing adsorption.- List of Participants.