Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1984-06-18
1986-08-05
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204149, 204106, 204112, C02F 146
Patent
active
046041753
ABSTRACT:
A process for regeneration of an iron-copper chloride etching solution is disclosed which involves dividing the solution into at least two streams, one of which is supplied into a zone between the cathode and an anode made from a porous material permeable to elemental chlorine, at a rate ensuring laminary movement of the solution along the surface of the electrodes, while another stream is supplied into a zone after the anode at a rate ensuring turbulent movement of the solution along the anode surface. On the cathode the electrochemical reduction of ions of bivalent copper to metallic copper occurs and on the anode oxidation of ions of bivalent iron to ions of trivalent iron occurs, as well as chloride ions to elemental chlorine which diffuses through pores of the anode into the after-anode zone and oxidizes ions of bivalent iron. As a result, evolution of gaseous chlorine from the regenerating system is substantially avoided.
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Derevyanko Yan N.
Epifanova Valentina S.
Flerov Valery N.
Juzefovich Dmitry K.
Korolev Georgy V.
Adams Bruce L.
Boggs Jr. B. J.
Burns Robert E.
Lobato Emmanuel J.
Niebling John F.
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