Methyl-isobutyl ketone and 1-octanol as synergistic agents and phase modifiers in solvent extraction of cobalt(II) by the N-(2-hydroxybenzylidene)aniline from sulfate medium

Abstract

The synergistic solvent extraction of cobalt(II) from sulfate medium with N-(2-hydroxybenzylidene) aniline in association of two synergistic agents, the methyl-isobutyl ketone (MIBK) and 1-octanolin chloroform at 25 °C, has been studied. Synergistic and antagonistic effects are observed for the title metal at low and high concentration ratios of the synergistic agents. The synergistic extraction of cobalt(II) with the mixtures has been investigated with the methods of slope analysis. The extracted species with the mixtures are CoL2(S)2 and CoL2 (HL) (S) (L, denoted N-(2-hydroxybenzylidene) aniline ion and S denoted MIBK or 1-octanol).

Keywords:

• Solvent extraction
• cobalt(II)
• N-(2-hydroxybenzylidene)-aniline
• methyl-isobutyl ketone
• synergism