Apparatus and method for purifying bath liquids

Details Apparatus and method for purifying bath liquids Apparatus and method for purifying bath liquids

1994-08-10

1995-12-05

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041808, 204301, 204252, 204263, B01D 6144

Patent

active

054725860

ABSTRACT:
An apparatus and method for purifying metal ion-containing bath liquids used for metal surface cleaning. The method comprises circulating two kinds of bath liquids (11A, 11B) through a plurality of electrolytic cells (1), each composed of an anode (2) and a cathode (4) separated by two ion-selective permeable diaphragms (6, 7), in such a way as to introduce the bath liquid into the intermediate compartment (8), electrophoresing metal ions contained in the bath liquids (11A, 11B ) into the cathode compartment (5) of each electrolytic cell (1), simultaneously circulating the catholyte (14) through the cathode compartment (5) of the electrolytic cell (1), thereby forming and coagulating easily magnetizable metal particles and hardly magnetizable metal particles in the catholyte (14), and separating the coagulation using a magnetic separator (17).

REFERENCES:
patent: 3869359 (1975-03-01), Beer
patent: 4128465 (1978-12-01), Smith

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