Patent ID: 7314539

Claim:
A pressure electrolyzer comprising: a pressure vessel, and an electrolytic-cell block which is arranged in the pressure vessel and contains a plurality of electrolytic cells combined in the form of a stack, wherein each of the electrolytic cells contains anodes and cathodes, wherein an electrolyte-circuit system is provided for supplying an anolyte to the anodes and for supplying a catholyte to the cathodes, wherein the electrolytic-cell block comprises a housing which is sealed relative to the interior of the pressure vessel, wherein the housing of the electrolytic-cell block, together with the pressure vessel, forms at least two chambers, which are separated from each other, which constitute a part of the electrolyte-circuit system, and which are defined relative to the electrolytic cells by the housing and relative to the atmosphere by the pressure vessel, and wherein one of the chambers, separated from another of the chambers, constitutes a part of an anolyte circuit, and the other of the chambers, separated from said one of the chambers, constitutes a part of a catholyte circuit.