水溶液和酸性有机磷萃取剂萃取物中重稀土元素溶液密度和介电介电常数的测定

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2023-01-01 DOI:10.36807/1998-9849-2023-65-91-9-15

V. Fedorov, M. A. Afonin

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引用次数: 0

摘要

用2-乙基己基膦酸单-2-乙基己基酯(P507) +二(2,2,4-三甲基戊基)膦酸(Cyanex 272) + 10约的混合萃取剂从含总稀土元素的氯化物溶液中共萃取稀土元素。在质量浓度为P507 + Cyanex 272 - 15%的异戊二醇中，% TBP。测定了中重族稀土元素在水溶液和酸性有机磷萃取剂萃取液中的密度和介电常数。REE GH溶液的初始浓度范围为0.15 ~ 1.7 mol/dm3。研究了金属镨与P507萃取剂混合形成络合物的特点。镨溶液的初始浓度范围为0.014 ~ 0.149 mol/dm3。

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DETERMINATION OF DENSITY AND DIELECTRIC PERMITTIVITY OF SOLUTIONS OF MEDIUM-HEAVY RARE EARTH ELEMENTS IN AQUEOUS SOLUTIONS AND IN EXTRACTS OF ACIDIC ORGANOPHOSPHORUS EXTRACTANTS

Co-extraction of rare-earth elements from chloride solutions containing total rare-earth elements by a mixture of extractants mono-2-ethylhexyl ester of 2-ethylhexylphosphonic acid (P507) + di(2,2,4-trimethylpentyl)phosphinic acid (Cyanex 272) + 10 about. % TBP in isopar-l with a mass concentration of P507 + Cyanex 272 - 15%. The density and permittivity of solutions of rare-earth elements of the medium-heavy group in aqueous solutions and in extracts of acidic organophosphorus extractants have been determined. Initial concentrations in REE GH solutions ranged from 0.15 to 1.7 mol/dm3. The features of complex formation in a mixture of praseodymium metal and P507 extractant were studied. The initial concentrations in praseodymium solutions ranged from 0.014 to 0.149 mol/dm3.

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Bulletin of the Saint Petersburg State Institute of Technology (Technical University)

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