Regenerative copper etching process and solution

Details Regenerative copper etching process and solution Regenerative copper etching process and solution

C - Chemistry, Metallurgy

23

F

149/14

C23F 1/18 (2006.01) C23F 1/16 (2006.01) C23F 1/46 (2006.01)

Patent

CA 1215300

ABSTRACT Process and solution for etching copper and other metals, wherein the etching solution is regenerated and the copper or other metal is recovered in a relatively pure and useful form. The metal is contacted with an aqueous solution of nitric acid to dissolve the metal and form a nitrate of the metal, and sulfuric acid is added to the solution to convert the nitrate to nitric acid and a precipitate of the metal.

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