Patrylak L. Heterogeneous-catalytic carbonium-ion conversions of hydrocarbons

Synthesis of effective acidic zeolite catalysts, generalization in the region of their properties, and also in the region of heterogenous-catalytic carbonium-ionic transformations of hydrocarbons. Zeolite catalysts and carbonium-ion reactions of hydrocarbons. Ionic exchange, ІR-, EPR-, PMR-spectroscopy, low temperature absorption of nitrogen. High effective zeolite catalysts for the carbonium-ion hydrocarbon conversions have been synthesized. The samples have been studied in alkylation of isoparaffin and aromatic hydrocarbons by olefins, in cracking of different classes of hydrocarbons, isomerization and aromatization of n-paraffins under conditions providing the formation of the primary conversion products. On the basis of the distribution of the last the conception of carbonium-ion reaction mechanisms has been proposed with key role of primary carbocations, stabilized by negative charged zeolite lattice positions, at starting and final reaction steps while secondary and tertiary carbocations decide at intramolecular rearrangements only. The treatment of oscillatory phenomenon, accompanying carbonium-ion hydrocarbon conversions, as well as new thermodynamic treatment of nature of adsorption-desorption hystereses have been proposed. Sphere of the use - petrochemistry.