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RARE METALS, SEMICONDUCTORS
ArticleName Production of individual rare earth metal oxides from luminophore wastes
DOI 10.17580/tsm.2017.09.09
ArticleAuthor Vasilenko S. A., Yurasova O. V., Dobrynina T. V., Arzmanova A. B.
ArticleAuthorData

JSC “Giredmet”, Moscow, Russia:

S. A. Vasilenko, Leading Production Engineer
O. V. Yurasova, Head of Laboratory of High-Purity Substances Production Technology, e-mail: OVYurasova@giredmet.ru
T. V. Dobrynina, Production Engineer
A. B. Arzmanova, Researcher

Abstract

We considered the production of individual rare earth metal oxides (europium and yttrium) from luminophore wastes using raw material chlorination methods at the stage of its opening and extraction with carboxylic acid at the stage of yttrium and europium separation. Additional purification of the lanthanide compounds from non rare earth impurities was accomplished by the precipitation of their oxalates. Extraction of yttrium and europium from chloride solutions was studied using Versatic 911, caprylic and oleic acids. All extractants were preliminarily treated with a 25% of ammonia water to produce an ammonia soap, which was subsequently used for extraction of lanthanides. For each extractant, the distribution of metals was studied by adjusting the pH of the aqueous phase. The coefficients of separation of the Eu/Y pair by carboxylic acids were determined. The maximum value for Versatic 911, caprylic acid and oleic acid is 2.04, 4.94 and 5, respectively, which is sufficient to separate the pair in the extraction cascade. The disadvantages of Versatic 911 are the smallest separation coefficients. Caprylic acid is characterized by a tendency to form precipitation during extraction. Therefore, further studies were performed on oleic acid, with additional advantages being affordability, low cost and domestic production. Studies on the extraction of yttrium and europium were carried out on model solutions and confirmed by results on technological solutions containing 125 g/l of the sum of lanthanides (96% yttrium and 4% europium) and up to 10 g/l zinc. The calculation of the counter-current cascade was executed and modeled for production of individual oxides of these rare earth metals. The purity of the oxides obtained by the processing of luminophore waste was 99.91% of europium and 99.90% of yttrium.
This work was carried out with the financial support of the Ministry of Education and Science of Russia within the Agreement 14.579.21.0138 (03.10.2016), unique identifier RFMEFI57916X0138.

keywords Luminophore, wastes, rare earth metals, yttrium, europium, solvent extraction, carboxylic acid, extraction cascade
References

1. Kazankin O. N., Markovskiy L. Ya., Mironov I. A. Pekerman F. M., Petoshina L. N. Inorganic luminophores. Leningrad : Khimiya, 1975. 192 p.
2. Gupta C. K., Krishnamurthy N. Extractive metallurgy of rare earths, 2nd edition. Boca Raton; New York : CRC Press, 2016. 869 p.
3. Samsonov N. Yu., Semyagin I. N. Review of global and Russian market of rare-earth metals. EKO. 2014. No. 2. pp. 45–54.
4. Van den Bogaert B., Havaux D., Binnemans K., Gerven T. V. Photochemical recycling of europium from Eu/Y mixtures in red lamp phosphor waste streams. Green Chemistry. 2015. Vol. 17, No. 4. pp. 2180–2187. DOI: 10.1039/c4gc02140a
5. Tunsu C., Ekberg C., Foreman M., Retegan T. Targeting fluorescent lamp waste for the recovery of cerium, lanthanum, europium, gadolinium, terbium and yttrium. Mineral Processing and Extractive Metallurgy. 2016. Vol. 125, No. 4. pp. 199–203. DOI: 10.1080/03719553.2016.1181398
6. Dupont D., Binnemans K. Rare-earth recycling using a functionalized ionic liquid for the selective dissolution and revalorization of Y2O3:Eu3+ from lamp phosphor waste. Green Chemistry. 2015. Vol. 17, No. 2. pp. 856–868. DOI: 10.1039/c4gc02107j
7. Tulyakov N. V., Gasanov A. A., Yurasova O. V., Blitman M. P. Method of processing of zinc sulfide based luminophore wastes, containing yttrium and europium. Patent RF, No. 2595314 RF. Applied: 02.04.2015. Published: 03.08.2016. Bulletin No. 24.
8. Mikhaylichenko A. I., Mikhlin E. B., Patrikeev Yu. B. Rare-earth metals. Moscow : Metallurgiya, 1987. 232 p.
9. Bukin V. I., Zimina G. V., Nikolaeva I. I., Tauk M. V. Separation of rare-earth metals by liquid extraction. Tsvetnye Metally. 2015. No. 2. pp. 64–70.
10. Technical Requirements TU 9145-172-4731297—94. Oleic technical acid B-115 (Б-115). Introduced: 20–01–1995.
11. Brown C. G., Sherrington L. G. Solvent extraction in industrial separation of rare earths. Journal of Chemical Technology and Biotechnology. 1979. Vol. 29, No. 4. pp. 193–209.
12. Korpusov G. V. Extraction methods of separation of rare earth elements. Abstracts of the International solvent extraction conference ISEC-88. Moscow, USSR, July 18–24 1988. Moscow : Nauka. 1988. Vol. 3. pp. 120–126.
13. Korpusov G. V., Korpusova R. D., Vaks G. L., Patrusheva E. N. Some regula rities of distribution of rare-earth elements during extraction in the system with carbonic acids. Zhurnal neorganicheskoy khimii. 1969. Vol. 14, No. 7. pp. 1912–1919.
14. Zimina G. V., Nikolaeva I. I., Tauk M. V., Tsygankova M. V. Extraction schemes of rare-earth metals' separation. Tsvetnye Metally. 2015. No. 4. pp. 23–27. DOI: 10.17580/tsm.2015.04.04
15. Voldman G. M. Basis of extraction and ionic-exchange processes in hydrometallurgy. Moscow : Metallurgiya, 1982. 376 p.
16. Gasanov A. A., Semenov A. A., Apanasenko V. V., Yurasova O. V. Calculation of complete counter-current extraction cascade with exchange washing using EXCEL. Tsvetnye Metally. 2016. No. 5. pp. 44–49. DOI: 10.17580/tsm.2016.05.07
17. Alders L. Theory and laboratory experiments. Moscow : Izdatelstvo inostrannoy literatury, 1962. 258 p.

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