Abstract: | The extraction of Pr, Eu and Yb from a solution of NH4SCN at pH<2 with="" a="" solution="" of="" aliquat-336—scn="" in="" benzene="" has="" been="" investigated.="" the="" formation="" of="" the="" following="" kinds="" of="" extractable="" complexes="" in="" dependence="" of="">2>4SCN and H2SO4 was established: [Ln(SCN)4]–1, [Ln(SCN)5]–2, [Ln(SCN)6]–3. |