Filter press type electrolytic cell and frames for use therein

US4378286A · kind A · utility

Assignee

• Occidental Chemical Corporation · US

Inventors

• Jeffrey D. Eng · North Vancouver, CA
• Cyril J. Harke · Burnaby, CA
• Tsujihiko Eukunaga · Grand Island, US
• Helmuth Schurig · Holzwickede, DE
• Luciano Mose · Dortmund, DE

Key dates

• Filing date: Dec 29, 1980
• Grant date: Mar 29, 1983
• Expiry date: Dec 29, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B9/73
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A filter press type electrolytic cell for the electrolysis of brine to produce chlorine and caustic includes a plurality of rectangular frames having U-shaped or channel-shaped walls, the open sides of each of which wall members face inwardly, and a downcomer tube in each frame for conducting product from near the top of the frame to the bottom thereof for withdrawal. The downcomer tubes are located near a framing side but are not within a framing channel. The openings of the framing walls are partially covered by cross members of the same material as the framing to improve the resistance thereof to distortion during closing of the cell. Utilization of the downcomer tubes, preferably of polytetrafluoroethylene for the catholyte compartment and titanium or titanium clad material for the anolyte compartment, allows the maintaining of the framing channel open so that inner walls thereof are electrolytically protected against corrosion. Otherwise, when enclosed or tubular framing members are employed inner wall portions thereof can become corroded after relatively short periods of use. The invention also relates to frames for use in filter press type electrolytic cells and to a method …