Selective Separation and Purification of Platinum Group Metals, Rare Earth Elements, and Cobalt from Primary and Secondary Sources Using a Green Chemistry SuperLig® Molecular Recognition Technology (MRT) Approach

2019 ◽  
pp. 203-232
Author(s):  
Steven R. Izatt ◽  
Reed M. Izatt ◽  
Ronald L. Bruening ◽  
Krzysztof E. Krakowiak ◽  
Neil E. Izatt
Keyword(s):  
Rare Earth ◽  
Molecular Recognition ◽  
Green Chemistry ◽  
Rare Earth Elements ◽  
Selective Separation ◽  
Platinum Group Metals ◽  
Separation And Purification ◽  
Secondary Sources ◽  
Molecular Recognition Technology ◽  
Platinum Group

Industrial applications of molecular recognition technology to separations of platinum group metals and selective removal of metal impurities from process streams

2015 ◽  
Vol 17 (4) ◽  
pp. 2236-2245 ◽  
Author(s):  
Reed M. Izatt ◽  
Steven R. Izatt ◽  
Neil E. Izatt ◽  
Krzysztof E. Krakowiak ◽  
Ronald L. Bruening ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Industrial Applications ◽  
Selective Removal ◽  
Platinum Group Metals ◽  
Metal Impurities ◽  
Removal Of Metal ◽  
Specialty Metal ◽  
Molecular Recognition Technology ◽  
Platinum Group

Selective precious and specialty metal separations and recovery using molecular recognition processes are described for commercial mining and recycling operations.

Selective separation of yttrium from rare earth elements by ion interaction chromatography. Analytical and larger scale applications

2019 ◽  
Vol 55 (7) ◽  
pp. 1364-1379 ◽  
Author(s):  
Rajmund S. Dybczyński ◽  
Marta Pyszynska ◽  
Krzysztof Kulisa ◽  
Anna Bojanowska-Czajka
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Separation

scholarly journals Study on the Effect and Mechanism of Impurity Aluminum on the Solvent Extraction of Rare Earth Elements (Nd, Pr, La) by P204-P350 in Chloride Solution

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Wenjie Zhang ◽  
Xian Xie ◽  
Xiong Tong ◽  
Yunpeng Du ◽  
Qiang Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Organic Phase ◽  
Extraction Process ◽  
Industrial Applications ◽  
Separation And Purification ◽  
Aluminum Ion ◽  
Hydrochloric Acid Medium ◽  
Impurity Ion

Solvent extraction is the most widely used method for separation and purification of rare earth elements, and organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) and di(1-methyl-heptyl) methyl phosphonate (P350) are most commonly used for industrial applications. However, the presence of impurity ions in the feed liquid during extraction can easily emulsify the extractant and affect the quality of rare earth products. Aluminum ion is the most common impurity ion in the feed liquid, and it is an important cause of emulsification of the extractant. In this study, the influence of aluminum ion was investigated on the extraction of light rare earth elements by the P204-P350 system in hydrochloric acid medium. The results show that Al3+ competes with light rare earths in the extraction process, reducing the overall extraction rate. In addition, the Al3+ stripping rate is low and there is continuous accumulation of Al3+ in the organic phase during the stripping process, affecting the extraction efficiency and even causing emulsification. The slope method and infrared detection were utilized to explore the formation of an extraction compound of Al3+ and the extractant P204-P350 that entered the organic phase as AlCl[(HA)2]2P350(o).

Sponge-like Ca-alginate/Lix-84 beads for selective separation of Mo(VI) from some rare earth elements

2021 ◽  
Author(s):  
Ahmed M. Shahr El-Din ◽  
Moubarak A. Sayed ◽  
Tarek M. Monir ◽  
Nesreen M. Sami ◽  
Amal M.I. Aly
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Separation ◽  
Ca Alginate

scholarly journals Possibilities of recovery and separation of rare earth elements

2019 ◽  
Vol 73 (1) ◽  
pp. 99
Author(s):  
Dominika Fila
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mineral Resources ◽  
Oil Refining ◽  
Secondary Sources ◽  
Energy Technologies ◽  
Technology Products ◽  
Low Emission ◽  
Market Situation ◽  
Critical Mineral

Rare earth metals are a group of elements widely used in high technology products. They are included in the group of critical mineral resources for the EU economy. Rare earth elements are found in computers and mobile phones, as well as in low-emission energy technologies. They are also applied in chemical processes as catalysts in the oil refining. Some of them occur even in considerable quantities in the earth's crust but not very often in the concentrations justifying the profitability of their extraction. Additionally, the constantly growing demand and the current market situation cause that alternative resources of rare earth elements recovery are sought after. Therefore, the recovery and separation methods as well as recovery from the secondary sources are becoming more and more important. The following paper presents the possibilities of recovery and separation of rare earth elements from primary and secondary sources.

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