Capillary electrolytic cell with laminar flow conditions - has grooved counter-electrode with insulating coating, giving high conversion

摘要

Laminar flow conditions are utilised in electrolysis in capillary cells to stop rediffusion of the electrolysis prods. to the counter electrode, allowing reversible electrolysis to be carried out without the use of diaphragms. The counter electrode has grooves covered with an insulating layer to facilitate removal of the gas evolved and, at the same time, prevent reversal of electrolysis by reducing the electrode surface area (by ca. 90%) and thus increasing the current density. High conversions (over 50%) can be obtd. with current yields of 90% even in reversible electrolysis. Conversions of 80% can also be produced at lower current yields of ca. 60%. The grooves can be radial or concentric (with radial connections). Only the bridges act as electrode.