The extraction of uranium (VI) from sulphuric and nitric acid solutions by Di-(2-ethylhexyl)-phosphoric acid

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

DOI:https://doi.org/10.1007/BF00836595· OSTI ID:4743038

Sato, Taichi

The partition of U/sup 6+/ between H/sub 2/SO/sub 4/ or HNO/sub 3/ solutions a nd the solutions of di-(2-ethylhexyl) phosphoric acid (DEHPA) in kerosene was investigated by varying the acid concentrations, solvent and aqueous uranium, and temperature. The partition coefficient for U/sup 6+/ extraction from H/sub 2/SO/sub 4/ solutions of varying concentrations decreases with increasing aqueous acidity. With increased organic phase U concentration, the polymeric U--DEHPA complex is formed. For extraction from HNO/sub 3/ solutions, the partition coefficient decreases with aqueous acidity below 3M HNO/sub 3/, but above this value the shape of the extraction isotherm is similar to that obtained with TBP. The mechanisms involved are given. (J.S.R.)

• Research Organization: Government Chemical Industrial Research Inst., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-018207
• OSTI ID: 4743038
• Journal Information: Naturwissenschaften, Journal Name: Naturwissenschaften Journal Issue: 1 Vol. 50; ISSN 0028-1042
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ALKYL RADICALS
CHEMISTRY
DEHPA
KEROSENE
NITRIC ACID
ORGANIC PHOSPHORUS COMPOUNDS
PETROLEUM
PHOSPHORIC ACID
REACTION KINETICS
SOLUTIONS
SOLVENT EXTRACTION
SULFURIC ACID
TEMPERATURE
URANIUM COMPLEXES