Characteristic Studies of Critical Rare Earths Scandium …
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Fig. 4 Leaching of scandium and yttrium as the function of varying acid strength. (Color figure
online)
range 25–80 °C in adjustable of the shaker. Figure 5 exhibited the percentage of
scandium and yttrium leaching corresponding to varied temperatures. The leaching
efficiency of scandium and yttrium was increased from 36 and 41% to 48, and 45%
when the reaction temperature increased from 25 to 70 °C. Leaching efficiency was
found unchanged with a further increase in temperature, i.e., 80 °C. Therefore, 70 °C
was selected as the optimum temperature.
Fig. 5 REE leaching yielded as the function of temperature within 1 h leaching using 3 mol/L HCl.
(Color figure online)
19
Fig. 4 Leaching of scandium and yttrium as the function of varying acid strength. (Color figure
online)
range 25–80 °C in adjustable of the shaker. Figure 5 exhibited the percentage of
scandium and yttrium leaching corresponding to varied temperatures. The leaching
efficiency of scandium and yttrium was increased from 36 and 41% to 48, and 45%
when the reaction temperature increased from 25 to 70 °C. Leaching efficiency was
found unchanged with a further increase in temperature, i.e., 80 °C. Therefore, 70 °C
was selected as the optimum temperature.
Fig. 5 REE leaching yielded as the function of temperature within 1 h leaching using 3 mol/L HCl.
(Color figure online)