Search academic texts

Information × Registration Number 0224U033585, (0121U100515) , R & D reports Title Improving the efficiency of heterogeneous catalytic systems based on zeolites and development of new microheterogeneous systems based on microemulsions popup.stage_title Модифікація поверхні цеолітів ПАР. Мікроемульсійний синтез нанодисперсного карбонату кальцію та створення нових композиційних матеріалів на його основі. Head Patryliak Liubov K., Доктор хімічних наук Registration Date 31-12-2024 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description1 The aim of the work is to increase the efficiency of heterogeneous catalytic systems based on zeolites obtained from domestic raw materials of natural origin, as well as microheterogeneous ultrafine composite materials from biosynthetic surfactants and nanodispersed calcium carbonate, using the latest approaches to improve their properties. popup.description2 The natural zeolite of the Ukrainian deposit (Lypcha village, Transcarpathia) and its altered forms were modified with surfactants of different nature, studied using a number of physicochemical methods and tested in the sorption of methylene blue and methyl orange dyes from aqueous solutions. A model of surfactant adsorption on the studied rock has been proposed, according to which, in the case of a cationic surfactant, a partial exchange of zeolite cations for surfactant cations occurs by the ion exchange mechanism with the formation of a double layer of surfactant, and in the case of modification with an anionic surfactant, the latter adsorbs in the form of micelles on the outer surface of zeolite crystals. The factors influencing the set of mechanisms of dye sorption that are realized on each individual sample, which determines its sorption capacity, have been established. The nanodispersed calcium carbonate was synthesized by the intermicellular interaction of two microparticulate emulsions with different reagents in the dispersed phase. The obtained samples of dispersed calcium carbonate systems with improved properties: resistance to delamination and thermal stability, can be recommended for use in places of depressurization of wells (microcracks). Product Description popup.authors Artiushenko Viktor V. Bodachivska Larysa Yu. Borsuk Ivan O. Voloshyna Yuliia H. Zlochevskyi Kostiantyn V. Nizhnik Borys O. Pertko Oleksandra P. Safronov Oleh І. Yakovenko Anzhela V. popup.nrat_date 2024-12-31 Close