Abstract: The present invention relates to a device for removing gas-liquid mixtures from electrolysis cells divided into compartments, particularly membrane type cells, without producing pressure fluctuations, wherein each compartment of said cells is characterized in that it is provided with two different ducts for removing the mixture after separation into liquid-rich and gas-rich phases, each duct being connected with its first end to the upper part of the cell, while the other end of the gas-rich phase duct (4) is inserted into the liquid-rich phase duct (3) so that liquid is present only in the portion of the duct comprised between the connection to the cell and the point of inlet of the gas-rich phase. In the subsequent portion the flow consists in the gas-liquid mixture which is forwarded to a gas-disengaging vessel.

Abstract: Low capacity and high power density electric battery which electrolyzes water in the charging phase to produce hydrogen and oxygen used as reactants in the discharging phase, which battery comprises an ion-exchange membrane, separating two compartments, said compartments containing gas evolving positive and negative electrodes respectively for the evolution of oxygen and hydrogen during the charging phase and for recombination of the same to produce water during the discharging phase, as well as means for the circulation of said water in a spray form.

Abstract: An electrode comprising a gas permeable and liquid permeable coating bonded to an ion exchange membrane, said coating comprising low overvoltage electrocatalytic particles, more electroconductive electrolyte resistant particles and an electrolyte resistant binder compatible with the membrane to bond the particles thereto, the electrode coating being provided with a plurality of pores with a pore size of at least 0.1 microns.Effective porosity is imparted to the layer of particles by means of a sacrificial, pore-forming agent and by leaching out such agent after the particles have been bonded together and the layer formed is in its desired thickness, preferably after it has been deposited upon the membrane.Surface resistivity of the layer is reduced and the layer is effectively reinforced by incorporating electroconductive particles which often have a higher overvoltage than the electrocatalytic particles and also have high electroconductivity.

Abstract: An anode comprising an electroconductive substrate, whose external surface at least is selected from the group consisting of vanadium, niobium, tantalum and tungsten, alloys of said metals with each other and alloys of said metals with at least one metal selected from the group consisting of metals of groups IIIB and IV of the Periodic Table, lanthanides, actinides, the external surface having a corrosion resistant electrocatalytic coating of at least one member of the group consisting of noble metals and alloys thereof, noble metal oxides and non-noble metal oxieds, characterized in that the coating also contains at least one compound of an element selected from the group consisting of arsenic, antimony, bismuth, tin, for metal recovery from acid solutions based on fluodide-containing complex anions and an electrochemical cell.

Abstract: The present invention relates to an electrochemical process for deoxygenating deionized water utilizing a membrane electrolyzer and optionally a catalytic reactor, characterized in that operation is carried out at ambient temperature avoiding the need for the addition of substances, dangerous for the health of the operators, able to pollute the enviornment or cause undesired increase of the concentration of dissolved salts.