| 摘要 |
A continuous high flow rate process for the transport of metal ions from a first aqueous liquid to a nonaqueous, water-immiscible liquid and therefrom to a second aqueous liquid. The nonaqueous liquid contains one or more complexing agents and is kept separated from the metal-ion-transferring aqueous liquid by one or more microporous hydrophobic membranes. A portion of the nonaqueous liquid is found in the pores of these membranes. The bulk of the nonaqueous liquid, however, is circulated through two or more transport zones. The transport of the metal ions to the second aqueous liquid occurs by mechanically mixing the nonaqueous liquid with the second aqueous liquid to form a mixture having an aqueous phase. The aqueous phase is separated from the mixture by means of an isolation process using membranes. The present process is well suited for processes involving the coupled co-transport and counter-transport of metal ions and can be used advantageously in ore dressing and wastewater treatment. Costly separation and purification processes are avoided.
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