Supercritical fluid extraction of molybdenum complexes and its isotopes with carbon dioxide

• Main Authors: Borts, B.V., Bulavin, L.A., Skoromnaya, S.F., Tkachenko, V.I.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2020
• Series: Вопросы атомной науки и техники
• Subjects: Nuclear-physical methods and processing of data
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/194561

Separation of molybdenum complexes and its isotopes by supercritical fluid extraction (SFE) with carbon dioxide was experimentally investigated. The type of modifier, which provides increasing the efficiency of the metal and its isotopes separation, was determined. Extraction of molybdenum isotope complexes was carried out in the updated SFE-U unit at a constant value of the initial pressure P=20 MPa and constant temperatures of the upper (T1=35°C) and bottom (T2 = 45°C) flanges of the extraction chamber. The exposure time of the extract and the level along the extraction chamber height, from which the eluent was sampled, were set in the experiments. It is shown, that at a certain sampling height and at certain exposure times, change in the natural content of Mo isotopes in the extracts takes place.