PROCESS FOR THE SEPARATION AND PURIFICATION OF ZIRCONIUM AND HAFNIUM
A process for the separation and purification of hafnium and zirconium by means of complex compounds is described. The process consists of first treating freshly prepared zirconium - hafnium phosphates or hydroxides with sufficient oxalic acid to achieve complete dissolution. Simultaneously or subsequently an equal amount of oxalic acid is added to complex the compounds until they cannot be decomposed by boiling or by addition of coagulants. The complex is then fractionally precipitated by adding mineral acid. The precipitant may be a hydrochloric acidammonium oxalate solution which contains phosphoric acid, a water soluble phosphate with a mineral acid, or phosphoric acid alone. (N.W.R.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-018152
- OSTI ID:
- 4011738
- Report Number(s):
- GB 866719
- Country of Publication:
- United Kingdom
- Language:
- English
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Related Subjects
AMMONIUM COMPOUNDS
ANIONS
BOILING
BUTYL PHOSPHATES
CATIONS
CHEMISTRY
COMPLEXES
HAFNIUM
HAFNIUM PHOSPHATES
HYDROCHLORIC ACID
HYDROXIDES
IMPURITIES
MINERAL ACIDS
NITRATES
NITRIC ACID
OXALATES
OXALIC ACID
PHOSPHORIC ACID
PRECIPITATION
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
STABILITY
ZIRCONIUM
ZIRCONIUM NITRATES
ZIRCONIUM PHOSPHATES