Method for recovery and use of zinc from a leach solution
AssigneeDiamond Shamrock Corporation
InventorJames R. Brannan
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Abstract
This invention relates to the art of electrowinning and, more particularly, to a process for recovering zinc which is leached from an alloy coating of nickel and zinc which has previously been deposited on cathodes of an electrolytic cell used in the electrolysis of alkali metal halides. Further, a method of utilizing the recovered zinc for control of the zinc content of the nickel-zinc plating solution is disclosed.
Claims6
In a process for the deposition of an active nickel-zinc alloy coating on cathode substrates to be utilized in electrolytic processes wherein a nickel-zinc alloy is electrodeposited on said cathode from a plating solution containing nickel ions and zinc ions and utilizing a nickel anode followed by the leaching of the zinc component of the alloy deposit into a solution of 50-400 grams per liter sodium hydroxide, a process for the recovery of zinc from the leach solution comprising the steps of:
- transferring a portion of the leach solution to a remote tank;
- immersing a cathode substrate in said leach solution in said remote tank;
- immersing an insoluble anode in said leach solution in said remote tank;
- electrically connecting said anode and said cathode to a source of direct current and electrolyzing said leach solution, and
- removing zinc metal deposited on said cathode from said remote tank.
Dependencies are inferred from the claim text.