Technique for Enhanced Rare Earth Separation

Author:

Uda Tetsuya1,Jacob K. Thomas2,Hirasawa Masahiro1

Affiliation:

1. Research Center for Metallurgical Process Engineering, Institute for Advanced Materials Processing, Tohoku University, Sendai 980-8577, Japan.

2. Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, India.

Abstract

A process is demonstrated for the efficient separation of rare earth elements, using a combination of selective reduction and vacuum distillation of halides. The large differences in the redox chemistry of the rare earth elements and in the vapor pressures of rare earth di- and trihalides are exploited for separation. Experimental proof of concept is provided for the binary systems praseodymium-neodymium and neodymium-samarium. This process enhances the separation factor for the isolation of samarium and neodymium from their mixture by more than an order of magnitude.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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