Method for regenerating plating solution
AssigneeFuji Shoji Co., Ltd.
InventorsNobuhiro Kanazawa, Katsuhiro Goto, Tatsuya Banno
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Abstract
The problem addressed by the present invention is to provide a method for facilitating the regenerating a waste plating solution as a plating solution. This method for regenerating an acidic waste plating solution containing, as ions, Fe and at least one plating metal element selected from the group consisting of Cu, Ni, Zn, Co, and Mn by removing Fe therefrom is characterized in having an addition step in which phytic acid is added to the waste plating solution to yield a phytic-acid-containing solution in which Fe ions are precipitated, and a removal step in which the precipitate is removed from the phytic-acid-containing solution to yield a regenerated plating solution.
Claims7
A method for regenerating a plating solution by removing Fe from an acidic waste plating solution containing, as ions, Fe and at least one plating metal element selected from the group consisting of Cu, Ni, Zn, Co, and Mn, the method comprising:
- adding phytic acid to the waste plating solution to yield a phytic-acid-containing solution in which Fe ions are precipitated;
- and
- removing the precipitate from the phytic-acid-containing solution to yield a regenerated plating solution.
Dependencies are inferred from the claim text.