Effect of crown ethers on the solvent extraction and separation of lanthanide(III) ions with 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one

✍ Scribed by Maria A. Petrova; Ivan L. Dukov

• Book ID: 111491126
• Publisher: Versita
• Year: 2008
• Tongue: English
• Weight: 313 KB
• Volume: 62
• Category: Article
• ISSN: 0366-6352
• DOI: 10.2478/s11696-008-0012-4

✦ Synopsis

Abstract

Synergistic solvent extraction of 14 lanthanides with mixtures of 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP) and the crown ethers (S), 18-crown-6, benzo-18-crown-6 or dibenzo-18-crown-6 from an aqueous chloride medium with the constant ionic strength of 0.1 mol dm−3 was investigated using benzene as a diluent. The composition of the species extracted was determined as LnP3 · S. The addition of a crown ether to the chelating extractant produced rather significant synergistic effects. On basis of experimental data, values of equilibrium constants, synergistic coefficients, and separation factors were calculated.