Add time:07/21/2019         Source:sciencedirect.com

A systematic structural separation study was carried out for the separation of Pr(III) and Fe(III) from nitric acid medium with unsymmetrical diglycolamides (DGAs). Four kinds of diglycolamides, N,N′-di-methyl-N,N′-di-dodecyl diglycolamide (DMDDdDGA), N,N′-di-ethyl-N,N′-di-dodecyl diglycolamide (DEDDdDGA), N,N′-di-propyl-N,N′-di-dodecyl diglycolamide (DPDDdDGA) and N,N′-di-butyl-N,N′-di-dodecyl diglycolamide (DBDDdDGA) with different alkyl substituent were synthesized and characterized. The effect of the structure of extractant on the separation of iron and praseodymium was studied. A high separation coefficient of Pr(III) and Fe(III) was obtained by DMDDdDGA in a wide range of nitric acid concentration, which shows good application prospect in the recovery and purification of rare earth.

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