Applications of zeolites as adsorbents and catalysts which have been developed recently in chemical industry are reviewed. Drying of gases and liquids, separation and purification of hydrocarbons are emphasized together with the application principles. Catalytic transformation of hydrocarbon such as cracking, isomerization, reforming, hydro-dehydrogenation, alkylation, oxydation and hydro-dehydration are also presented following up the recent research works.