Extraction of zirconium(IV) from sulfuric acid solutions by long-chain alkyl quaternary ammonium compound
The extraction of zirconium(IV) from sulfuric acid solutions by tricaprylmethylammonium chloride (Aliquate-336, R/sub 3/R'NCl) in organic solvent has been investigated under different conditions. The organic phases were also examined by ir and NMR spectroscopies. As a result, it was found that Aliquat-336 extracts zirconium(IV) from sulfuric acid solutions according to the following ion-exchange reactions: SO/sub 4//sup 2 -/(a) + 2R/sub 3/R'NCl(o) in equilibrium (R/sub 3/R'N)/sub 2/SO/sub 4/(o) + 2Cl/sup -/(a), (R/sub 3/R'N)/sub 2/SO/sub 4/(o) + H/sup +/(a) + HSO/sub 4//sup -/(a) in equilibrium 2R/sub 3/R'NHSO/sub 4/(o), and Zr(SO/sub 4/)/sub 3//sup 2 -/(a) + 2xR/sub 3/R'NHSO/sub 4/(o) + (1 - x) (R/sub 3/R'N/sub 2/SO/sub 4/(o) in equilibrium (R/sub 3/R'N)/sub 2/(Zr(SO/sub 4/)/sub 3/)(o) + xH/sub 2/SO/sub 4/(a) + SO/sub 4//sup 2 -/(a) where x = (R/sub 3/R'NHSO/sub 4/)/(2(R/sub 3/R'N)/sub 2/SO/sub 4/) + (R/sub 3/R'NHSO/sub 4/)), (a) and (o) represent the aqueous and organic phases, respectively. Furthermore, the hydrolyzed species (R/sub 3/R'N)(ZrO(OH)(SO/sub 4/)) is formed when zirconium is highly extracted into the organic phase.
- Research Organization:
- Shizuoka Univ., Hamamatsu, Japan
- OSTI ID:
- 5593939
- Journal Information:
- Sep. Sci. Technol.; (United States), Vol. 17:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
QUATERNARY COMPOUNDS
SOLVENT PROPERTIES
ZIRCONIUM
SOLVENT EXTRACTION
AQUEOUS SOLUTIONS
EXPERIMENTAL DATA
REACTION KINETICS
SULFURIC ACID
AMINES
AMMONIUM COMPOUNDS
DATA
DISPERSIONS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
TRANSITION ELEMENTS
400105* - Separation Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing