Hoechst Aktiengesellschaft

Hoeschst Aktiengesellschaft

Helmut Hund

Dieter Bergner

Kurt Hannesen

Wilfried Schulte

Lothar Pelz

Gerhard Quietzsch

Werner Bender

Winfried Hofmann

Helmut Schaefer

For the indirect measurement of the distribution of the anode currents in electrolytic cells operated with alkali metal chloride according to the amalgam process the cell voltage is determined without unnecessary ohmic connections between the current carrying elements of the cells and other conductive elements thereof.

Apparatus to measure the distribution of the anode currents in cells for

A long-term electrode for electrolytic processes comprises a skeleton of a metal passive under the conditions of the electrolytic process and an electrically conductive first coating which is bound to the metal skeleton in a tightly adhesive manner covering at least part of the metal surface and to which is applied electrochemically active substances selected from the group of platinum metals and platinum metal compounds. The first coating is produced on the metal surface by flame or plasma spraying. Subsequently at least one electrochemically active substance containing a platinum metal or oxide thereof is formed by a thermal degradation process and anchored to the pores of the first coating.

Method of making long-term electrode for electrolytic processes

In an electrolytic apparatus for the production of chlorine from aqueous alkali metal chloride solution, comprising at least one electrolytic cell with equipment for the supply of the current, the supply of the starting product and the discharge of the products of electrolysis and a separating wall for separating the anode and cathode, the housing of the cell is composed of two hemispherical shells, the electrodes are connected with the hemispherical shells by conductive bolts projecting through the wall of the shells and the projecting end faces of the bolts are in contact with current supply means and means to clamp together the supply means, the shells, the electrodes and the separating wall, which wall is positioned between electrically insulating spacers mounted in the extension of the bolts on the electrolytically active side of the electrodes and clamped between the edges of the hemispherical shells by packing elements.

Electrolytic apparatus

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Schneidhain, Germany

Helmut Hund