Extraction of trivalent rare-earth metal nitrates from concentrated aqueous salt solutions by triisoamyl phosphate

Journal Article · Sat Dec 31 23:00:00 EST 1994 · Radiochemistry

OSTI ID:133093

Pyartman, A K; Keskinov, V A; Puzikov, E A

Equations are proposed for describing isotherms of extraction of trivalent rare earth metal nitrates from concentrated aqueous salt solutions by neat triisoamyl phosphate, which allow for variations in the activity coefficients of the components in organic phase over a wide range of its compositions. The phase extraction constants have been determined, with a hypothetical 1 mol kg{sup {minus}1} aqueous solution of a rare-earth metal nitrate and the state of pure components in organic phase with a mole fraction of 1.0 taken as standard.

• OSTI ID: 133093
• Journal Information: Radiochemistry, Journal Name: Radiochemistry Journal Issue: 1 Vol. 37; ISSN RDIOEO; ISSN 1066-3622
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
EXTRACTION
ISOTHERMS
MATHEMATICAL MODELS
NITRATES
PHOSPHORIC ACID ESTERS
RARE EARTHS