Role of D2EHPA in Ion Flotation of Neodymium for Achieving a High Selectivity over Base Metal Impurities

Autor:	Bahram Rezai, Mehdi Zakeri Khatir, Mahmoud Abdollahy, Mohammad Reza Khalesi
Rok vydání:	2021
Předmět:	Inorganic chemistry General Engineering chemistry.chemical_element Calcium Neodymium Ion Gibbs free energy chemistry.chemical_compound symbols.namesake surgical procedures operative chemistry Impurity symbols General Materials Science sense organs Sodium dodecyl sulfate Selectivity Phosphoric acid
Zdroj:	JOM. 74:240-248
ISSN:	1543-1851 1047-4838
Popis:	Selective ion flotation of neodymium ions from aluminum, iron, and calcium ions using sodium dodecyl sulfate (SDS) as a surfactant and di-(2-ethylhexyl) phosphoric acid (D2EHPA) as an extractant was performed to selectively recover neodymium ions from solutions in a binary system of ions. The results indicated that the D2EHPA caused an increase in the neodymium ion recovery in the presence of all competing ions. Using D2EHPA, the calcium ion removal decreased and the removal of iron and aluminum ions increased. The Gibbs free energy of neodymium-D2EHPA complex formation was more than that of other ions, which led to an increase in the selective recovery of neodymium ions. The aluminum ions had a greater effect on decreasing the neodymium recovery than iron or calcium ions. Similar Gibbs free energy and complex structures of the neodymium and aluminum ions with D2EHPA led to the less selective separation of neodymium from aluminum.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2507a2c248030d8ccf16495a25d71e50 https://doi.org/10.1007/s11837-021-05016-y Zobrazit plný text záznamu Full text from SpringerLink