C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/214, 53/374
C22B 9/00 (2006.01) C01G 3/00 (2006.01) C22B 3/26 (2006.01) C22B 60/02 (2006.01)
Patent
CA 1054802
INVENTION: MEMBRANE HYDRO-METALLURGICAL EXTRACTION PROCESS INVENTORS: WIN-SOW HO LESTER T. C. LEE KANG-JEN LIU ABSTRACT OF THE DISCLOSURE A system utilizing membrane extraction is provided to recover metal values. The system may be used to separate metal ions from an aqueous solution through the membrane by an organic liquid containing a chelating agent. This invention also contem- plates the recovery of metal values from an organic phase, contain- ing the metal complexed with a chelating agent, by an aqueous phase using membrane extraction. In the former case, the metal ion is passed through the membrane from the aqueous phase to the organic phase where it forms a complex with a chelating agent present in the organic phase. In the latter case the metal is ex- tracted from the organic phase into the aqueous phase through the membrane. In both cases a chelating exchange reaction is involved at the interface between the membrane and one of the two phases. This hydro-metallurgical process employs membranes with metal ion diffusivity in the range of about 10-5 to about 10-8 cm2/sec. and has advantages over conventional metal extractions and may be applied as the mechanism in pollutant removal and recovery as well as for metallurgical separations.
239331
Ho Win-Sow
Lee Lester T. C.
Liu Kang-Jen
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