Abstract

Abstract A systematic liquid-liquid extraction behavior of some trivalent metals has been carried out with the high-molecular-weight synthetic carboxylie acid SRS-100 with benzene as diluent. In most cases extraction was quantitative; but in the casss of gallium and antimony the maximum extraction was 97.2 and 65%, respectively. Using pure solvent (without benzene diluent), quantitative extraction (> 99%) of gallium was possible with SRS-100 at pH 4.6. Gradual neutralization techniques have been adopted to study the extraction behavior of antimony in the pH range 2.0–6.5. The effect of metal ion concentration, solvent concentration, salting-out agents, diluents, and finally the interferences of associated elements were critically examined. The percentage extraction at various ranges of pH has also been studied. Some important separations have been carried out by exchange reactions. The proposed methods are very simple, rapid, and fairly selective. They can be carried out both at micro and macro levels.

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