PURIFICATION OF ZIRCONIUM TETRA HALIDES
Zirconium tetrahalides can be purified by distillation from a NaCl and/ or KCl melt at 340 to 450 deg C, but a difficulty ensues which hinders use of this method on a commercial scale: after a short period of distillation, the distilled product begins to take on a faint yellow color, indicating that some impurities, particularly FeCl/sub 3/, are distilling over. This difficulty can be remedied by adding a minor amount (0.5 to 5 wt.%) of finely divided Fe, Zr, Zr dihalide, Zr trihalide, or Zr halide-alkali metal halide complex, which suppresses the volatility of undesirable metal halide impurities. Thus the distillation can be carried out continuously. Four examples of this methcd are given for ZrCl/sub 4/ purification. (D.L.C.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-025494
- OSTI ID:
- 4135413
- Report Number(s):
- GB 847047
- Country of Publication:
- United Kingdom
- Language:
- English
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