The extraction of hafnium from nitric acid solutions with thenoyl trifluoroacetone

Technical Report · Tue Aug 09 04:00:00 EDT 1949

DOI:https://doi.org/10.2172/6322923· OSTI ID:6322923

McBride, J. P.

Data are presented which indicate that the extraction of Hf from 0.5 to 3.5 M HNO/sub 3/ with TTA has a 3rd power dependence on hydrogen ion and a fourth power dependence on TTA. The small deviations from fourth power dependence on TTA are explained by the formation of an aqueous soluble Hf-TTA complex. An apparent or effective value for the molar hydrogen ion activity coefficient f/sub c/' (H/sup +/), has been calculated for use in calculations involving the extraction of Hf from HNO/sub 3/ with TTA which may be of use in calculations involving the extraction of other metallic species from HNO/sub 3/ with TTA. A semi-empirical expression has been derived for the calculation of the distribution ratio of Hf between benzene phases 0.005 to 0.1 M in TTA and aqueous phases 0.5 to 3.5 M in HNO/sub 3/.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6322923
• Report Number(s): ORNL-303; ON: DE87012916
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
DISPERSIONS
DISTRIBUTION FUNCTIONS
ELEMENTS
EXTRACTION
FUNCTIONS
HAFNIUM
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KETONES
METALS
MIXTURES
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TRANSITION ELEMENTS
TTA