Process of Salicylic Acid-Type Composite for Rare Earth Ions

Abstract

The chelation adsorption behavior of a salicylic acid-type composite ASA-PGMA/SiO2for rare earth ions of the rare earth ore mud leaching solution in Mianning was studied in the present work. The effect of the reaction temperature and medium pH on adsorption properties of the ASA-PGMA/SiO2particle was examined. The concentrations of REEs were determined by ICP-MS. The results showed that the ASA-PGMA/SiO2possessed strong chelation adsorption ability for rare earth ions. The reaction temperature was 50°C, the adsorption properties of the composite were the best and the adsorption rate of rare earth ions reached above 90%. In the pH range where the hydrolysis of rare earth ions was inhibited, an increase in the pH value of the medium strengthened the chelation adsorption ability of the ASA-PGMA/SiO2particle for rare earth ions. The rare earth ions desorption from the ASA-PGMA/SiO2particle is effective when using 0.2mol/L of hydrochloric acid solution as the eluent.