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The work aim was the preparation of cracking catalysts on the base of the natural zeolite from the Shankanay field (Kazakhstan), modified with mineral acids, organic acids and heteropolyacids (HPA); the research of the catalysts by physicochemical methods of investigation. Accordingly to IR spectroscopic analysis during decationization and dealumination, the natural zeolite retains its crystalline structure. Presumably formation of a bond of HPA with zeolite proceeds at modifying the chosen zeolite by HPA. It was found from the EM data the high degrees of dispersion and distribution of particles of PW 12 -HPA on the surface of clinoptilolite. EM images of a thin layer of the catalyst on the base of PW 12 -HPA and zeolite activated by an acid, show spots with the various magnitudes and different shapes and contrasts. The experiments on EDAXspectrometer demonstrate that these spots have the same compositions that are identical to the PW 12 -HPA.

Abstract. The paper studies the influence of the nature of modifying acids (mineral, organic and heteropolyacids), and their combination on the composition and structure of the iron oxide rich clinoptilolit from Shankanay field in Kazakhstan for creation of selective catalysts in hydracarbon processing and sorbents for extracting ions of lanthanide and actinide elements. It is shown that sequential processing of natural zeolite in optimal conditions, by hydrochloric and sulfosalicylic acids lead to intensive decationization and dealumination, as well as maximum removal of iron ions from the zeolite framework without destroying it. It is found that the combination of activated clinoptilolite with hydrochloric acid and phosphotungstic heteropolyacid contributes to obtain catalyst system with high surface area and acidity.

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