| 摘要 |
<p>A method and apparatus for the extraction of a solute from an aqueous feed solution (242) into an aqueous stripping solution (244) are described. The method comprises the steps of providing at least one stream of each of said feed solution (242) and said stripping solution (244) passing through a continuous phase of a non-polar carrier liquid (248); said carrier liquid (248) having therein a chemical having an affinity for ions of at least two species in said solute in said feed solution (242); each of said at least one streams of feed (242) and stripping (244) solutions being under the influence of a high voltage electrostatic field for at least a part of their passage time through said carrier liquid (248) so as to break up said streams into a multiplicity of droplets of each of said solutions; and, providing mutually separated receiving means (212, 214) to collect the streams of said feed (242) and said stripping (244) solutions after they pass out of said high voltage electrostatic field; said method being characterised by providing means (236) to supply a third aqueous scrubbing solution (246) falling through said carrier liquid (248); means to disperse said aqueous scrubbing solution into small droplets; said chemical and said species migrating through said aqueous scrubbing stream (246) where at least some of one of said at least two species are extracted into said scrubbing stream (246).</p> |
