Fractional Precipitation of Lanthanum-Praseodymium Iodate from Homogeneous Solution Using Double Complexation and Replacement.
An efficient separation of lanthanum from praseodymium is described. Equal amounts of lanthanum and praseodymium were complexed by equivalent amounts of STA(carboxymethylimino)bis-(ethylenenitrilo)!tetraacetic acid and N(carboxym ethyl) -N' -2-hydroxyethyl-N, N' -ethylenediglycine, and iodate was added. A dilute solution of cadmium chloride was added dropwise to the stirred solution, selectively releasing lanthanum from its complex. A precipitation of rare earth iodate, enriched in lanthanum, occurred and continued as cadmium was added. The final precipitate contained about 99% of the lanthanum and 30% of the praseodymium. The filtrate contained about 70% of the praseodymium and 1% of the lanthanum. (auth)
- Research Organization:
- Univ. of Georgia, Athens
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-005986
- OSTI ID:
- 4766259
- Journal Information:
- Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 13 Vol. 34; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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