Abstract
Separation of rare earth elements (REE) is often achieved by acid leaching of mineral concentrates followed by subsequent solvent extraction (SX), to purify individual rare earth metals (REM). Cerium , the most abundant REE, is usually the largest component of these ores. Demand for less prevalent REE, such as praseodymium and dysprosium; have led to a market saturation and price collapse of cerium . One method of improving the economics of REE separation is to remove cerium from solution prior to SX. This is accomplished via the oxidation of cerium (III) to cerium (IV), which precipitates as cerium hydroxides. This study probes the efficacy of four oxidants; hydrogen peroxide , sodium hypochlorite, potassium permanganate , and Caro’s Acid with the goal of improving cerium removal whilst minimizing REE and reagent losses. The effect of oxidant type and dosage, pH, cerium concentration, and temperature on the kinetics of the process will be discussed.
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References
Haxel G, Hedrick J, Orris G, Stauffer P, Hendley II J (2002) Rare earth elements: critical resources for high technology. USGS
Parker J, Baroch C (1971) The rare earth elements, yttrium and thorium—a materials survey. Bureau of Mines Information Circular 8476, Washington, D.C., 1971
Zepf V (2016) An overview of the usefulness and strategic value of rare earth metals. In: Rare earths industry—technological and environmental applications, Waltham, Maryland, Elsevier
Binnemans K, Jones P, Van Acker K, Blanpain BMB, Apelian D (2013) Rare-earth economics: the balance problem. TMS
Gupta K, Krishnamurthy N (2005) Extractive metallurgy of rare-earths. CRC Press, Boca Raton
Li L, Yang X (2014) China’s rare earth ore deposits and benefaction techniques. In: Proceedings of the 1st European rare earth resources conference, Milos Island, Greece
Mancheri N (2016) An overview of chines rare earth export restrictions and implications. In: Rare earth industry—technological and environmental applications, Waltham, Maryland, Elsevier
Miller J, Zheng A (2015) Molycorp files for bankruptcy protection. The Wall Street Journal, New York
Brickley P (2017) Mountain pass mine approved for sale to JHL, QVT, Shenghe. The Wall Street Journal, New York, NY
Fuerstenau D, Khan PL, Raghayan S (1982) An alternate reagent scheme for the flotation of mountain pass rare earth ore. In: Proceedings of the 14th international mineral processing congress, Toronto, Canada
Luan H, Hao D, Mioduski T (1988) Separation of cerium from other lanthanides by leaching with nitric acid rare earth (III) hydroxide-cerium (IV) oxide mixtures. J Radioanal Nucl Chem 105–113
Zou D, Chen J, Yu L, Deqian L (2014) Wet air oxidation kinetics of cerium (III) of rare earth hydroxides. Ind Eng Chem Res 2014(53):13790–13796
Shiloy V, Gogolev A, Fedoseev A, Perminoy V (2014) Mechanism of cerium (III) oxidation with ozone in sulfuric acid solutions. Radiochemistry 56(4):339–441
Donohue T (1978) Photochemical oxidation of cerium from rare earth mixtures in aqueous solution. Chem Phys Lett 601–604
Nechaev A, Sibiley A, Smirnov A (2016) A rational approach to processing cerium—containing raw materials. Theor Found Chem Eng 50:863–866
Yu P, Hayes S, O’Keefe M, Stoffer J (2006) The phase stability of cerium species in aqueous systems: II. The formula systems. Equilibrium considerations and pourbaix diagram calculations. Electrochem Soc 153(1):C74–C79
Ali M, El-Alfy M, Zayed M, El-Hazek N, Rabie, KA, Aly H (1996) Separation of cerium (III) from Egyptan monazite by oxidation to cerium (IV). In: Proceedings of the third Arab conference on the peaceful uses of atomic energy, Damascus
Ho E, Wilkins D, Soldenhoff K (2014) Recovery of cerium from chlorine solution by oxidation with sodium hypochlorite. In: Proceedings of the 7th international symposium on hydrometallurgy 2014
Morais C, Abreu R (2010) Purificaation of rare earth elements from monazite sulphuric acid leach liquor and the production of high purity ceric oxide. Miner Eng 23:536–540
Morais C, Benedetto J, Ciminelli V (2003) Recovery of cerium by oxidation/hydrolysis with KMnO4–Na2CO3. In Proceedings of the fifth conference in Honor of Professor Ian Ritchie—volume 2: electrometallurgy and environmental hydrometallurgy
Castrantas HM, Manganaro JL, Rautiola CW, Carmichael J (1995) Treatment of cyanides in effluents with Caro’s acid. U.S. Patent 5, 397, 482
Acknowledgements
The authors would like to acknowledge the financial support for this study through Kingston Process Metallurgy (KPM) and Ontario Centre of Excellence (OCE).
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McNeice, J., Ghahreman, A. (2018). Selective Oxidation of Cerium in Rare Earth Solutions, a Comparison of Four Oxidants. In: Kim, H., et al. Rare Metal Technology 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72350-1_2
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DOI: https://doi.org/10.1007/978-3-319-72350-1_2
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