THE FIVE-COMPONENT SYSTEM UO$sub 2$(NO$sub 3$$)$$sub 2$-(C$sub 4$$H$$sub 9$$)$$sub 2$PO(C$sub 4$$H$$sub 9$O)-H$sub 2$O-HNO$sub 3$-CC1$sub 4$ AT A CONSTANT RATIO OF (C$sub 4$$H$$sub 9$$)$$sub 2$PO(C$sub 4$$H$$sub 9$O) TO CC1$sub 4$ IN A REGION OF PHASE SEPARATION

Journal Article · Fri Nov 01 00:00:00 EST 1963 · Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals

OSTI ID:4109223

Nikolaev, A V; Dyadin, Yu A; Yakovlev, I I; Mironova, Z N

A constant concentration (27.6 wt%) of the monobutyl ether of dibutylphosphinic acid (BEDBP) in a CCl/sub 4/ solution was taken as one component. Hence, the system was a pseudo four-component system. The formation of three liquid phases was not observed at any time. Samples of the aqueous and organic phases were taken for analysis. Nitric acid was determined by potentiometric titration, uranium by arsenazo-1 or by xylidine orange, and water by Fisher's method. The phase diagram shows a two-phase region, a homogeneous organic phase with 2% water and up to 20.2% uranyl nitrate, and various hydrates of UO/sub 2/(NO/sub 3/)/sub 2/ in contact with an organic phase. The distribution coefficients of UO/sub 2/(NO/sub 3/)/sub 2/ are plotted as isolines. The diagram indicates the formation of a solvate UO/sub 2/(NO/sub 3/)/sub 2/. 2BEDBP. This solvate was isolated in the form of yellow crystals melting at 53.8 plus or minus 0.3 deg C and decomposing at 234 deg C. The isolines of the uranium distribution coefficients indicate that nitric acid has only a slight salting-out effect on the recovery of uranium in this solvent system. (TTT)

• Research Organization: Inst. of Inorganic Chemistry, Siberian Section of the Academy of Sciences, USSR
• NSA Number: NSA-18-010187
• OSTI ID: 4109223
• Journal Information: Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals, Vol. Vol: 153; Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

CHEMISTRY
ARSENAZO
BEDBP
BUTYL RADICALS
CARBON TETRACHLORIDE
CHELATES
CHEMICALS
COLOR
COMPLEXES
CONFIGURATION
CRYSTALLIZATION
CRYSTALS
DECOMPOSITION
DIAGRAMS
DISTRIBUTION
DYES
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ESTERS
HYDROXIDES
MELTING POINTS
MIXING
MOLECULES
NAPHTHALENE
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHASE DIAGRAMS
PHENYL RADICALS
PYROLYSIS
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RECOVERY
SAMPLING
SOLUTIONS
SOLVENTS
TABLES
TITRATION
URANIUM
URANIUM COMPLEXES
URANYL COMPOUNDS
URANYL NITRATES
VARIATIONS
WATER