Method and apparatus for regeneration of a copper-containing etc

Details Method and apparatus for regeneration of a copper-containing etc Method and apparatus for regeneration of a copper-containing etc

1984-01-30

1985-04-02

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204107, 204130, C25C 112

Patent

active

045085994

ABSTRACT:
A method and apparatus for the regeneration of a copper-containing etching solution which contains copper (II) chloride as well as alkali chloride as a sequestering agent, wherein the cathode is operated at a current density of 40-400 A/dm.sup.2 and the anode is operated at a current density of 1-100 A/dm.sup.2. Copper forms at the cathode as a powdered slurry while chlorine forms at the anode which oxidizes copper (I) chloride to copper (II) chloride. With this method one can process etching solutions which contain not only copper but also base metals including zinc from etching brass or tombac, and obtain a powdered mixture of copper and base metal. The apparatus features a rotating disk-shaped cathode from whose outer face the metal powder is stripped by a scraper.

REFERENCES:
patent: 1959376 (1934-05-01), Lucas
patent: 4269678 (1981-05-01), Faul et al.

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