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Information × Registration Number 0214U008486, 0113U002865 , R & D reports Title Implementation of an installation prototype of uranium supercritical extraction for the recultivation of waste of the nuclear enterprises popup.stage_title Head Tkachenko Viktor Ivanovych, Registration Date 25-12-2014 Organization National Science Center "Kharkiv Institute of Physics & Technology" popup.description2 Reagents and modifiers for sample preparation uranium containing materials for supercritical fluid extraction carbon dioxide (SFE - CO2) were defined. Initial samples uranium containing materials for sample preparation were in the form of powder dispersion less than 50 microns with inclusions of solids with linear dimensions from a few mm or less. The activity is of the initial samples of 10 966 Bq / kg to 11,875 Bq / kg, and amount of uranium - from 0.0882% to 0.095% were defined. The method of formation of complexes of uranium was described, and the transactions at the SFE - CO2 extraction was listed. In 1 ml of the organic extract of the uranium containing material contained less than 1.87 mg of uranium was got by calculating. In the original samples uranium containing material are present besides uranium U, chemical elements: Mn; Cr; Cu; Fe; Nb, which affect the efficiency of SFE-CO2 extraction of uranium was determined. The optimum pressure and temperature of process of the SFE-CO2 extractions uranium from uranium-containing materials were experimentally determined. Their values are 16.0 MPa and 40 ° C respectively. An increasing of the content of Cr and Mn in the initial samples reduces the effectiveness of NFE-CO2 extraction of uranium to 90% and 92% for samples 3 and 5 respectively it was shown. However, in case the content of elements is decreases (sample 4) the efficiency NFE - CO2 extraction of uranium is increases to a level of 98% it was shown. Product Description popup.authors Іванова Стелла Федорівна Алфьорова Любов Іванівна Гончаров Ігор Григорович Казарінов Юрій Геннадійович Колода Вікторія Ігорівна Кроль Олександр Роландович Мазілов Олександр Валентинович Сіренко Сергій Анатольович Ткаченко Віктор Іванович Щербінін Віталій Ігорович popup.nrat_date 2020-04-02 Close