Solvent extraction of some metal ions with di-2-methylnonylphosphoric acid into heptane

✍ Scribed by Tao Wang; Yukio Nagaosa

• Publisher: Wiley (John Wiley & Sons)
• Year: 2002
• Tongue: English
• Weight: 136 KB
• Volume: 77
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.714

✦ Synopsis

Abstract

Di‐2‐methylnonylphosphoric acid (HA) as an extractant was investigated for the extraction of divalent metal ions into heptane at an aqueous ionic strength of 0.10 mol dm^−3^ (NaClO~4~) and at 25 °C. The extraction ability of metal complexes decreased in the order Cd(II) ≈ Mn(II) > Cu(II) > Co(II) > Ni(II). The metal complexes extracted were found to be all monomeric species for these metal ions using a slope analysis method. The curve fitting method was also applied to analyze the types of metal complexes extracted: MnA~2~3HA and MnA~2~4HA for manganese(II), CdA~2~3HA and CdA~2~4HA for cadmium(II), CuA~2~2HA and CuA~2~3HA for copper(II), CoA~2~3HA and CoA~2~4HA for cobalt(II) and NiA~2~4HA and NiA~2~5HA for nickel(II). Further, the extraction constants for the extracted metal complexes were evaluated.

© 2002 Society of Chemical Industry