The mechanism of uranium (VI) extraction from sulphuric acid solutions by Tri-n-octylamine

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Naturwissenschaften

DOI:https://doi.org/10.1007/BF00622815· OSTI ID:4734124

Sato, Taichi

The partition of U/sup 6+/ between H/sub 2/SO/sub 4/ solutions and solutions of tri-n-octylamine (TOA) in benzene was investigated by varying the concentrations of H/sub 2/SO/sub 4/, solvent and aqueous uranium, and temperature. The results show that the partition coefficient first rises steeply with the acidity, passes through a maximum, and then falls rapidly. The amine uranyl sulfate complex is formed in the presence of U, as indicated by both partition coefficient variations and infrared spectral studies. The mechanisms proposed are UO/sub 2/SO/sub 4/(a) + 2 (R/sub 3/NH)/sub 2/SO/sub 4/(o) in equilibrium (R/ sub 3/NH)/sub 4/UO/sub 2/(SO/sub 4/)/su b 3/(o) at low acidities and UO/sub 2/SO/ sub 4/(a) + 4 (R/sub 3/NH)HSO/sub 4/(o) in equilibrium (R/sub 3/NH)/sub 4/UO/su b 2/(SO/sub 4/)/sub 3/(o) + 2 H/sub 2/SO/sub 4/(a), where (a) and (o) indicate aqueous and organic phases and R, C/sub 8/H/sub 17/. (J.S.R.)

• Research Organization: Government Chemical Industrial Research Inst., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-018208
• OSTI ID: 4734124
• Journal Information: Naturwissenschaften, Journal Name: Naturwissenschaften Journal Issue: 2 Vol. 50; ISSN 0028-1042
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
AMINES
CHEMISTRY
REACTION KINETICS
SOLUTIONS
SOLVENT EXTRACTION
SULFURIC ACID
TEMPERATURE
TOA
URANIUM COMPLEXES
WATER