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Information × Registration Number 0224U033130, (0123U103126) , R & D reports Title Peculiarities of the oleochemical platform substances modification in the presence of strong acidic cation exchange resins as solid catalysts popup.stage_title Гідроксилювання та ацилювання олеохімічних речовинплатформ у присутності сульфокатіонітів як каталізаторів Head Konovalov Serhii V., к.х.н. Registration Date 18-12-2024 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description1 Identification of the regularities of heterogeneous-catalytic transformations of the oleochemical platform substances in the presence of commercial brands of cation exchange resins as catalysts depending on the nature of their polymer matrix, as well as creation of the effective approaches to the synthesis of "green" functional analogues of practically important materials based on fossil hydrocarbon raw stuff with their participation. popup.description2 On the basis of wasted frying oil, oleochemical platform substances for further chemical modification were synthesized, including fatty acids, monoalkyl oleates (n-C2-C4 and i-C3-С4) and their epoxidized derivatives. Samples of commercial brands of sulfonated cation exchange resins (Purolite CT275, СU-2-8, and Amberlite IR120H) were characterized as solid acid catalysts using IR-spectroscopy, low-temperature nitrogen adsorption/desorption, TG/HDSC and chemical analysis. A comparison of peculiarities of the important oleochemical transformations in the presence of porous and non-porous sulfonic cation exchange resins, including esterification of fatty acids and levulinic acid, epoxidation of monoalkyl oleates, oxirane rings opening of epoxidized monoal kyloleates by monohydric alcohols (alkoxylation), carboxylic acids (acylation), and water (hydrolysis) was carried out. Only the porous sulfonated resin demonstrated the high efficiency in the esterification of fatty acids with n-butanol under reflux conditions with reaction water removal, while in the esterification of levulinic acid gel-type resin also exhibited comparably high activity. All studied samples of sulfonated resins were highly effective in the epoxidation of monoalkyl oleates double bonds, providing full conversion and virtually 100 % selectivity; in presence of Purolite CT275 such results is achievable with at least twice lower its loading. In the studied reactions of oleoepoxides oxirane ring opening, the porous Purolite CT275 provides a significantly higher conversion, and the non-porous KU-2-8Chs shows a tendency to higher selectivity for the target products. This is most evident in alkoxylation, where selectivity over KU-2-8Chs can reach 90 %. Acylation can proceed at a moderate rate without a catalyst, while the use of porous Purolite CT275 in this process favors the isomerization of the epoxide to the ketone more than the target reaction. Product Description popup.authors Davitadze David Z. Konovalov Serhii V. Pertko Oleksandra P. popup.nrat_date 2024-12-18 Close