Electrolytic cell comprising an interior trough

The invention relates to an electrolytic device for producing halogen gases from an aqueous alkali halide solution. Said device comprises several plate-type electrolytic cells, which lie adjacent to one another in a stack and make electrical contact with one another, each cell having a housing composed of two half-shells (1),(2) that consist of an electrically conductive material. The housing comprises devices for supplying the electrolytic current and the electrolytic feed substances and devices for carrying off the electrolytic current and the electrolytic products, in addition to an anodicelectrode (4), a cathodic electrode (5) and an electrolytic membrane that is located therebetween. According to the invention, the level of liquid is increased and the volume of the residual gas region minimised in at least one of the two half-shells in a defined manner by built-in (7),(12) components. The latter form a trough, which runs horizontally, parallel to the electrolytic membrane. The invention is characterised