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• W2907204557 abstract "Rare earth elements (REEs) have become vital components in a wide range of industrial applications. The demand for the REEs has grown significantly in the last few decades.Today, despite lower prices than in 2011, they are classified as the highest supply risk elements in the EU; thus new incentives for recycling the REEs out of electronic scrap were brought forth. End-of-life neodymium magnets are a viable source for the recovery of some REEs. Although mainly iron alloys, these materials contain neodymium, dysprosium and small admixtures of praseodymium and terbium. Leaching followed by solvent extraction of the REEs out of the leachate is an attractive and efficient way of recycling these elements out of end-of-life neodymium magnets. The issues that are encountered along this recycling path is the separation of the REEs from the other elements that are dissolved with the REEs into the leachate and achieving high separation factors between the REEs from each other. Extracting agents such as D2EHPA (di(2-ethylhexyl)phosphoric acid) and TODGA (tetraoctyl diglycolamide) have been previously used for achieving good separation of the REEs under specific extraction conditions. This research has focused on the development and optimization of REE extraction from real commercial waste sources, the nitric acid and sulfuric acid media leachates of the neodymium magnet waste, using TODGA and D2EHPA as extracting agents, respectively. Selective REE extraction from the solution with minimal or no co-extraction of other elements in the leachate is hoped to provide a novel route to a commercially viable route to recyclable REE products. The composition of the organic phase was investigated in order to study the effect of the diluent on the overall extraction process, a well-known optimization parameter, however infrequently used. The effect of the diluent on the separation factors was also discussed as well as some characteristics of the aqueous phase on the overall extraction process. The named extractants were used at various concentrations in different diluents like solvent 70, hexane, octane, cyclohexanone, toluene, 1-octanol and chloroform. Both extractants showed good selectivity concerning the extraction of the REEs out of the neodymium magnet waste leachates." @default.
• W2907204557 created "2019-01-11" @default.
• W2907204557 creator A5037308275 @default.
• W2907204557 creator A5062776029 @default.
• W2907204557 date "2017-03-15" @default.
• W2907204557 modified "2023-09-26" @default.
• W2907204557 title "Recovery of Rare Earths Elements from Neodymium Magnets using Solvent Extraction: the Effect of Diluents" @default.
• W2907204557 hasPublicationYear "2017" @default.
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