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Information × Registration Number 0223U005740, 0120U104981 , R & D reports Title New effective zeolite catalysts for environmentally friendly processes of the conversion of renewable raw materials into valuable organic compounds popup.stage_title Head Shcherban Nataliia D., Кандидат хімічних наук Registration Date 30-12-2023 Organization L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine popup.description2  For the first time, the catalytic properties of MWW materials with adjustable texture characteristics (three-dimensional MCM-22 and layered MCM-36, MCM-56 materials) and different Si/Al ratios (12 – 35), as well as commercial beta zeolite, in the Prins–Friedel–Crafts reaction between aldehyde (butanal or benzaldehyde), 3-butene-1-ol and anisole were investigated. It was found that not only the high concentration of acid sites, but also their increased accessibility are the key factors that provide increased activity of micro-mesoporous MCM-36 (conversion – 82%, selectivity towards 4-aryltetrahydropyrans – 50%) when using bulk aldehyde (benzaldehyde) as a substrate. It was found that the highest yield of γ-valerolactone (74% in 24 h) in the cascade process of furfural transformation at atmospheric pressure and 117 °C is achieved in the presence of zeolite Zr-Al-USY (Zr/Al = 2.6) with the optimal Brønsted to Lewis acid sites ratio (0.1), which is necessary for the reactions of conversion of furfural to 2-pentylfurfuryl ether and 2-pentyllevulinate into γ-valerolactone with the participation of Lewis acid sites and conversion of 2-pentylfurfuryl ether into 2-2-pentyllevulinate over Brønsted acid sites. Basic, acidic and adsorption characteristics of titanosilicate zeolites of various structural types, nanocomposites based on hierarchical zeolites, porous metal oxides or mesoporous materials, as well as their catalytic properties in the reaction of the synthesis of cyclic carbonates from styrene under CO2 pressure, were studied. It was shown for the first time that the highest yield (up to 98%) of the desired product is achieved over Cs-forms of hierarchical BEA zeolites, titanosilicate MTW zeolites and template-containing BEA with quenched Brønsted acid sites. Product Description popup.authors Kurmach Mykhailo M. Shvets Oleksii V. popup.nrat_date 2023-12-30 Close