This paper deals with two industrially very important reactions. The vapor-phase Beckmann rearrangement of cyclohexanone oxime to epsilon-caprolactam and the isomerization of alpha-pinene to campholenic aldehyde. The first reaction represents the synthesis of a significant intermediate in the nylon-6 production route, the latter the formation of fine chemicals for use in the fragrance industry. Both catalytic reactions are carried out heterogeneously over zeolites and demonstrate the advantages of these materials employed as catalysts in industrial processes.