Process for making copper foil

Details Process for making copper foil Process for making copper foil

C - Chemistry, Metallurgy

22

B

C22B 3/30 (2006.01) C22B 3/04 (2006.01) C22B 3/26 (2006.01) C22B 15/00 (2006.01) C25C 1/12 (2006.01) C25D 1/04 (2006.01)

Patent

CA 2155209

The present invention relates to a process for making copper foil from copper-bearing material comprising: (A) contacting said copper-bearing material (10) with an effective amount of d least one aqueous leaching solution (40); (B) contacting a copper-rich aqueous leaching solution (11) with an effective amount of at least one water-insoluble extractant (20); (C) separating a copper-rich extractant (48) from a copper-depleted aqueous leaching solution (14); (D) contacting said copper-rich extractant (48) with an effective amount of at least one stripping solution (22); (E) separating a copper-rich stripping solution (16) from a copper-depleted extractant (64); (F) flowing said copper-rich stripping solution (25) between an anode (28) and a rotating cathode (26), and applying an effective amount of voltage across said anode and said cathode to deposit copper (26a) on said cathode; and (G) continuously removing copper foil (12) from said cathode.

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