SEPARATION OF ZIRCONIUM AND HAFNIUM IN SULFURIC SOLUTION BY ANION EXCHANGER (in French)
A procedure for the separation of zirconium and hafninm, using the pantition of the anion sulfate complexes of these elements between an anion exchange resin and a sulfunic acid solution, was studied. The determination of the partition curves of these elements permits the understanding and the interpretation of the phenomena. In the concentration limits used and imposed by the stability of the solutions of Zr(IV) and Hf(IV), it was shown that (1) the hafnium is retained less by the resin (initially in the bisulfate form) than the zirconium; (2) an excess of sulfate in the aqueous solution is not favorable to the fixation of the two elements; and (3) the conditions necessary for the obtention of a displacement of Hf(IV) by Zr(IV) are not realizable and the Hf is always eluted by a sulfuric solution of the Zr. It is in 1.5 M sulfate medium (half sulfuric acid, half sodium sulfate) that the partition coefficients of the two elements are the most different and, consequently, the separation would be the easiest. A mixture Hf(IV) + Zr(IV) is made with a 0.15 M solution of pure zirconium sulfate (total sulfate 1.5 M). In these conditions, Hf is eluted from the Zr, which is accumulated in the frontal zone of the solution development but without undergoing dilution. The separation can be made continuously with the use of columns with moving resin beds (tr-auth)
- Research Organization:
- Ecole de Physique et de Chimie, Paris
- NSA Number:
- NSA-15-015672
- OSTI ID:
- 4053283
- Report Number(s):
- AEC-tr-5099; CEA-1944
- Journal Information:
- Bull. soc. chim. France, Journal Name: Bull. soc. chim. France Vol. Vol: No. 2
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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