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Selective Extraction of Rare Earth Elements from Phosphoric Acid by Ion Exchange Resins

1
French Nuclear and Alternative Energies Commission (CEA), Nuclear Energy Division—CEA Marcoule, Research Department of Mining and Fuel Recycling ProCesses (DMRC), BP 17171, F-30207 Bagnols sur Ceze, France
2
Research & Development Direction, OCP SA., BP 118, Jorf Lasfar El Jadida, El Jadida 24000, Morocco
*
Author to whom correspondence should be addressed.
Metals 2018, 8(9), 682; https://doi.org/10.3390/met8090682
Received: 28 June 2018 / Revised: 2 August 2018 / Accepted: 25 August 2018 / Published: 30 August 2018
(This article belongs to the Special Issue Advances in Hydrometallurgy)
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Abstract

Rare earth elements (REE) are present at low concentrations (hundreds of ppm) in phosphoric acid solutions produced by the leaching of phosphate ores by sulfuric acid. The strongly acidic and complexing nature of this medium, as well as the presence of metallic impurities (including iron and uranium), require the development of a particularly cost effective process for the selective recovery of REE. Compared to the classical but costly solvent extraction, liquid-solid extraction using commercial chelating ion exchange resins could be an interesting alternative. Among the different resins tested in this paper (Tulsion CH-93, Purolite S940, Amberlite IRC-747, Lewatit TP-260, Lewatit VP OC 1026, Monophos, Diphonix,) the aminophosphonic IRC-747, and aminomethylphosphonic TP-260 are the most promising. Both of them present similar performances in terms of maximum sorption capacity estimated to be 1.8 meq/g dry resin and in adsorption kinetics, which appears to be best explained by a moving boundary model controlled by particle diffusion. View Full-Text
Keywords: phosphoric acid; rare-earth elements; separation; solid-liquid extraction; ion exchange resin phosphoric acid; rare-earth elements; separation; solid-liquid extraction; ion exchange resin
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Hérès, X.; Blet, V.; Di Natale, P.; Ouaattou, A.; Mazouz, H.; Dhiba, D.; Cuer, F. Selective Extraction of Rare Earth Elements from Phosphoric Acid by Ion Exchange Resins. Metals 2018, 8, 682.

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