Research Article
Adsorption of Rare Earth Ce3+ and Pr3+ Ions by Hydrophobic Ionic Liquid
Scheme 1
Reactants and setup: (i) dry CH3COCH3, zinc chloride, sulphuric acid (cat.), RT (97%); (ii) iodine, PPh3, imidazole, C6H6CH3, 80 oC, 3 h (82%); (iii) NMI, acetonitrile, reflux, six days (89%); and (iv) NaPF6, H2O (80%).