Electrode element for electrolytic purposes and its use

US5312533A · kind A · utility

Assignee

• Heraeus Elektrochemie GmbH

Inventors

• Max Mayr · Alzenau, DE
• Wolfgang Blatt · Wächtersbach, DE
• Harri Heinke · Niederrodenbach, DE

Key dates

• Filing date: Aug 5, 1992
• Grant date: May 17, 1994
• Expiry date: Aug 5, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2201/46115
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

In order to prevent mechanical damage to electrode surfaces and to facilitate easy swapping out of immersible electrodes for inspection or replacement, an electrode element for an electrolysis cell for electrolytic precipitation of metals from a liquid containing metal ions has a frame (1) provided with parallel side sections (2, 3) of electrically insulating plastic. Each element includes at least one conduit (13) for supplying a liquid ion conductor and at least one conduit (16) for the removal of this liquid ion conductor. There is at least one planar active part is disposed between the conduits to serve as an electrode (7), along which the ion conductor flows. The active surface of the electrode (7) is covered by an ion exchange diaphragm (20). The electrode element is adapted for partial dipping, up to a predetermined immersion line (17), in the liquid. The electrode (7) is removably supported in the side sections (2, 3) of the frame (1). The diaphragm (20) defines a pouch enclosing at least the portion of the electrode (7) dipped into the metal-ion-containing liquid. The pouch is enclosed by a protective box (21) of an electrically insulating plastic provided with openings (2…