| 摘要 |
<p>A process of selectively separating a target metal contained in a solid matrix from the solid matrix by contacting the solid matrix containing a target metal with an aqueous solution including a water-soluble polymer adapted for complexation with the target metal for sufficient time whereby a water-soluble polymer-target metal complex is formed, and separating the solution including the water-soluble polymer-target metal complex from the solid matrix. The figure illustrates the process, wherein a metal containing feed solution is fed via line (1) to a solution of water soluble polymer in tank (2). A reaction mixture is conveyed via line (3), pump (4) and line (5) to separation device (6) which is preferably an ultrafilter. The separation is mormally accompanied by recirculating the mixture through the membrane device having a throttle valve (7) in line (8) to maintain a pressure of less than 60 psi in the membrane unit. Effluent in line (9) is free of the target metal.</p> |
