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Role of D2EHPA in Ion Flotation of Neodymium for Achieving a High Selectivity over Base Metal Impurities by Mehdi Zakeri Khatir; Mahmoud Abdollahy; Mohammad Reza Khalesi; Bahram Rezai is a Engineering article available to read on EtoBox.

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

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.

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Author

Mehdi Zakeri Khatir; Mahmoud Abdollahy; Mohammad Reza Khalesi; Bahram Rezai

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Engineering (Physical Sciences)