Abstract: An apparatus for removing cations/anions from liquids including a container provided with an anode mounted centrally in the container, a cathode surrounding the anode and a layer of ion exchange material mounted between the cathode and anode, the cathode and a wall of the container form an outer space filled with water therebetween, the anode and cathode form a water-free inner space therebetween, the inner and outer spaces are connected with each other at opposite ends in order to generate a liquid circulation.

Abstract: The invention relates to an apparatus for removing cations/anions from liquids, having a container material between a cathode and the layer of ion exchange material between the anode and the cathode and a free liquid-filled space as a treatment space between the layer of ion exchange material and the cathode and a liquid-filled outer space between the cathode and the wall of the container, the treatment space and the outer space being connected to one another at both ends in order to permit liquid circulation.