Extraction of rare-earth metal(III) nitrates from concentrated aqueous solutions by diisoamyl methylphosphonate

Journal Article · Tue Jun 20 00:00:00 EDT 1995 · Russian Journal of Applied Chemistry

OSTI ID:175758

Pyartman, A K; Keskinov, V A; Puzikov, E A ^[1]

---

1. St. Petersburg Technological Institute (Russian Federation)

Equations have been developed for describing the isotherms of extraction of rare-earth metal(III) [REM(III)] nitrates from aqueous concentrated solutions by 100% diisoamyl methylphosphonate, taking into account the variation of activity coefficients of components in the organic phase when its composition is varied within broad limits. The thermodynamic parameters of the extraction equilibria have been calculated using as the standard states hypothetical one-molal aqueous REM(III) nitrate solutions and pure components of the organic phase at a mole fraction of 1.0.

• OSTI ID: 175758
• Journal Information: Russian Journal of Applied Chemistry, Journal Name: Russian Journal of Applied Chemistry Journal Issue: 1 Vol. 68; ISSN 1070-4272; ISSN RJACEO
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
EQUILIBRIUM
ISOTHERMS
MATHEMATICAL MODELS
PHOSPHONATES
RARE EARTHS
SOLVENT EXTRACTION