Effect of solvents on extraction and carrier-facilitated transport of lithium ion by polyethylene glycols

The extraction and carrier-facilitated transport of lithium picrate, 2,4-di nitrophenoxide, and 2-nitrophenoxide through bulk liquid membranes (chlorof orm, methylene chloride, 1,2-dichloroethane, and carbon tetrachloride) were studied using di-, tri-, and tetraethylene glycols as carriers. The sequen ce of solvents observed for extraction and transport of the cations is as f ollows: methylene chloride > 1,2-dichloroethane > chloroform > carbon tetra chloride. Diethylene glycol proved to be the most efficient extractant and carrier for transport of lithium ions.