Abstract
Dissolution of rare earth elements from bastnasite ore was studied using different leaching agents such as sulfuric acid, hydrochloric acid, acetic acid, citric acid and sodium hydroxide at 70°C, with 1mol/L, s/L ratio of 0.05 between 30 and 180 min. The one-step direct leaching strategy was applied under atmospheric pressure aiming at selective leaching of rare earth elements from a matrix of iron oxides in which the rare earth elements - carbonates & flourides - are embedded. .
Highlights
Rare earth elements are a group of metallic elements of the periodic table, often overlooked, but very significant in today’s industrial landscape and modern lifestyle
A sulfuric acid leaching process was studied for the processing of roasted ore of Dechang bastnasite in Sichuan, China, in order to obtain rare earth elements (Feng et al, 2013, pp.849-854)
After a few hours from the leaching operation with sulfuric acid, a fine, white precipitate appeared at the bottom of test tubes and the bottle
Summary
Rare earth elements are a group of metallic elements of the periodic table, often overlooked, but very significant in today’s industrial landscape and modern lifestyle. A sulfuric acid leaching process was studied for the processing of roasted ore of Dechang bastnasite in Sichuan, China, in order to obtain rare earth elements (Feng et al, 2013, pp.849-854). The aim of this work is to compare the leaching efficiency of different leaching agents such as sulfuric acid, hydrochloric acid, acetic acid, citric acid and sodium hydroxide at 70°C, using 1mol/L, solid/liquid ratio of 0.05 between 30 and 180 min in order to recover rare earth elements.
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