Development of a Reliable Analytical Method for Liquid Anion-Exchange Extraction and Separation of Neodymium(III)

Table 3

Extraction behaviour of neodymium(III) as a function of diluents. Nd(III) = 60 μg, sodium succinate = 0.06 M, pH = 6.0, Aq : Org = 25 : 10, strippant = 0.1 M HClO₄ (2 × 5 mL), and equilibrium time = 5 min.

Solvent	Dielectric constant, ε	Percentage extraction (%E)	Distribution ratio (D)
Benzene	2.28	100	∞
Toluene	2.38	89.0	20.22
Xylene	2.30	100	∞
Kerosene	1.80	63.5	4.34
Carbon tetrachloride	2.24	82.3	11.62
Chloroform	4.40	89.9	22.25
Amyl alcohol	13.90	74.8	8.82
1,2-Dichloroethane	10.5	68.4	5.41
MIBK	13.11	69.6	5.70
n-Butanol	17.8	81.4	10.94