Extraction of formic acid with 30% tributyl phosphate solution in dodecane

Journal Article · · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6492962

Volk, V I; Shilin, I V; Veselov, S N; Karelin, A I; Belov, V A; Dorda, F A

Extraction of formic acid from aqueous solutions with 30% tributyl phosphate solution in dodecane was studied as a basis for understanding more complex systems involving metals (Pu/sup 4 +/, Np/sup 4 +/, etc.). The equilibrium formic acid concentrations and the volumes of the coexisting phases were determined. The relationships required for describing the formic acid distribution between the aqueous solution and the extractant were derived. The equilibrium constants were determined for the reactions yielding the monosolvate HCOOH x TBP (K/sub 1/ = 0.56) and the semisolvate (HCOOH)/sub 2/ x TBP (K/sub 0.5/ - 0.0061). The phase stability boundaries were established. It was shown that the investigated system has a very extended region of layering into three phases.

• OSTI ID: 6492962
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 25:3; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALKANES
AQUEOUS SOLUTIONS
BUTYL PHOSPHATES
CARBOXYLIC ACIDS
DATA
DISPERSIONS
DODECANE
EQUILIBRIUM
ESTERS
EXPERIMENTAL DATA
EXTRACTION
FORMIC ACID
HYDROCARBONS
INFORMATION
MIXTURES
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TBP