C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/461 (2006.01) C02F 1/467 (2006.01) C02F 1/62 (2006.01) C02F 1/76 (2006.01) C02F 9/00 (2006.01) C02F 1/72 (2006.01)
Patent
CA 2188274
A method for destroying metal cyanide complexes in a cyanide-containing effluent having a variable composition, wherein the free anions are chemically oxidised (20) and the metals are reduced at the cathode by electrodeposition (60). The chemical oxidation and electrolysis steps can be carried out simultaneously or one after the other. A three-compartment membrane electrolysis device (62) comprising an anode, two cation exchange membranes and a cathode is also disclosed. The cation exchange membranes used are commercially available membranes having good strength properties and good selectivity in alkaline media. Moreover, they are mechanically supported by frames on a polymeric support, e.g. a polyvinyl chloride (PVC) support.
A method for destroying metal cyanide complexes un a cyanide-containing effluent having a variable composition, wherein the free anions are chemically oxidised (20) and the metals are reduced at the cathode by electrodeposition (60). The chemical oxidation and electrolysis steps can be carried out simultaneously or one after the other. A three-compartment membrane electrolysis device (62) comprising an anode, two cation exchange membranes and a cathode is also disclosed. The cation exchange membranes used are commercially available membranes having good strength properities and good selectivity in alkaline media. Moreover, they are mechanically supported by frames on a polymeric support, e.g. a polyvinyl chloride (PVC) support.
Aubanel Jean-Christophe
Cohen Thierry
Gavach Claude
Persin Francoise
Thauront Jacques
Emc Services
Fetherstonhaugh & Co.
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