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Information × Registration Number 0222U001191, 0121U108754 , R & D reports Title Obtaining effective sorption materials for the extraction of rare earth elements popup.stage_title Head Sofronov Dmytro S., Registration Date 24-01-2022 Organization State Scientific Institution Scientific and Technological Complex" Institute of Single Crystals "of the National Academy of Sciences of Ukraine popup.description2  The work carried out during 2021 aimed at the development of sorption materials based on a copolymer (styrene with divinylbenzene) and diammonium titanium oxytetrafluoride for the selective extraction of rare earth metals from aqueous solutions. The object of research is functional materials based on inorganic and organic compounds. The main research methods are infrared spectroscopy, X-ray phase analysis, scanning microscopy, inductively coupled plasma atomic emission spectrometry. A copolymer of styrene with divinylbenzene was synthesized, which was modified with organic impurities SL-1952M, SL-1953m, SL-19550M1 and CV113-2. Its sorption properties have been studied. It was found that the modification of the copolymer can increase the efficiency of extraction of iron, lead, copper, lanthanum, cerium and europium in an acidic environment (at pH 3-6) to 80-95%. It is noted that in the process of sorption purification the modifier is leached from the sorbent due to the higher solubility of complexes with metals. The sorption properties of diammonium titanium oxytetrafluoride (NH4)2TiOF4 particles were studied for the first time. It is shown that regardless of the synthesis conditions, (NH4)2TiOF4 are characterized by the efficiency of extraction of lanthanum, yttrium, scandium, europium and cerium more than 95% at pH above 3. The efficiency of lead extraction at pH above 4 is more than 95%, and extraction of iron, zinc, strontium and cobalt increases with increasing pH. In the pH range of 3-6 particles (NH4)2TiOF4 show selectivity for rare earth elements. The sorption capacity in relation to cerium and europium at pH 5.5 is 350 and 300 mg / g, respectively. An increase in the deposition temperature leads to a decrease in the sorption capacity by 2-3 times, which is associated with an increase in particle size. According to the results of the study 2 articles were prepared. Product Description popup.authors popup.nrat_date 2022-03-09 Close