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The characteristics of the dehydration, thermal desorption and thermal decomposition of organic templates in zeolite-like aluminophosphates and silica aluminophosphates of different structural types have been elucidated. The influence of the pore size and acidic centres on the composition of the thermal decomposition products, including the secondary syntheses of normal, cyclic and aromatic hydrocarbons, has been established. The possibility of dehydration, oligomerization, cyclization, cracking, aromatization and alkylation of hydrocarbons in zeolite-like phosphates has been shown.