The invention relates to a method and a device for producing diluted hydrofluoric acid using an electrode arrangement (1), which has an anode chamber (2) with an anode (4) and a cathode chamber (6) with a cathode (8), which are separated from one another by an anion exchange membrane (10), wherein in the method—pure water is guided through the anode chamber (2), —pure water, which includes at least one electrolyte which forms fluoride ions (F−), is guided through the cathode chamber (6), —and an electrical voltage is applied between the anode (4) and the cathode (8) such that the fluoride ions (F−) are moved through the anion exchange membrane (10) into the anode chamber (2), and an electrical current flows.

The invention relates to a method and a device for producing diluted hydrofluoric acid using an electrode arrangement (1), which has an anode chamber (2) with an anode (4) and a cathode chamber (6) with a cathode (8), which are separated from one another by an anion exchange membrane (10), wherein in the method—pure water is guided through the anode chamber (2), —pure water, which includes at least one electrolyte which forms fluoride ions (F−), is guided through the cathode chamber (6), —and an electrical voltage is applied between the anode (4) and the cathode (8) such that the fluoride ions (F−) are moved through the anion exchange membrane (10) into the anode chamber (2), and an electrical current flows.

Provided is a method for producing fluorine gas, capable of suppressing clogging of pipes and valves with mist. Fluorine gas is produced by a method including electrolyzing an electrolyte in an electrolytic cell, measuring the water concentration in a fluid generated in a cathode chamber in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. In the sending, the flow path in which the fluid flows is switched in accordance with the water concentration measured in the measuring the water concentration.

Provided is a method for producing fluorine gas, capable of suppressing clogging of pipes and valves with mist. Fluorine gas is produced by a method including electrolyzing an electrolyte in an electrolytic cell, measuring the water concentration in a fluid generated in a cathode chamber in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. In the sending, the flow path in which the fluid flows is switched in accordance with the water concentration measured in the measuring the water concentration.

Electrode attachment assemblies for electrolytic cells and electrolytic cells having one or more electrode attachment assemblies and the method of using the same are provided that comprise a carbon-containing electrode and one or more deformable attachment elements in direct or indirect contact with said carbon-containing electrode, wherein said one or more deformable attachment elements will deform at a stress lower than the stress that results in fracture of the carbon-containing electrode to accommodate the expansion of the carbon-containing electrode when in use.

Electrode attachment assemblies for electrolytic cells and electrolytic cells having one or more electrode attachment assemblies and the method of using the same are provided that comprise a carbon-containing electrode and one or more deformable attachment elements in direct or indirect contact with said carbon-containing electrode, wherein said one or more deformable attachment elements will deform at a stress lower than the stress that results in fracture of the carbon-containing electrode to accommodate the expansion of the carbon-containing electrode when in use.

An electrode for electrolytic fluorination contains nickel as a base material with a fluorine content <1,000 ppm. Preferably, in at least a surface portion thereof, the nickel content ≥99 mass %, the iron content ≤400 ppm, the copper content ≤250 ppm, and the manganese content ≤1,000 ppm. A method for producing an electrode includes arranging a nickel base material electrode in a nickel plating bath as a cathode, and applying nickel plating to the nickel base material electrode by electrolytic nickel plating, the method including (1) using, as an anode, a nickel component deposited on a cathode, or a nickel component that has settled in a molten salt, in a process of producing nitrogen trifluoride by molten salt electrolysis using a nickel base material anode, or the nickel base material anode; or (2) using, as the cathode, the nickel base material anode.

An electrode for electrolytic fluorination contains nickel as a base material with a fluorine content <1,000 ppm. Preferably, in at least a surface portion thereof, the nickel content ≥99 mass %, the iron content ≤400 ppm, the copper content ≤250 ppm, and the manganese content ≤1,000 ppm. A method for producing an electrode includes arranging a nickel base material electrode in a nickel plating bath as a cathode, and applying nickel plating to the nickel base material electrode by electrolytic nickel plating, the method including (1) using, as an anode, a nickel component deposited on a cathode, or a nickel component that has settled in a molten salt, in a process of producing nitrogen trifluoride by molten salt electrolysis using a nickel base material anode, or the nickel base material anode; or (2) using, as the cathode, the nickel base material anode.

The present invention provides a disinfectant composition, method for preparing a disinfectant composition, and methods of disinfecting of a surface or article using the disinfectant composition. These compositions are light stable, non-toxic, and non-corrosive, achieve a greater than 99% kill rate on a variety of pathogens and do not contain nanoparticles.

An electrolytic cell has a partition that covers an upper region of one electrode of an anode and a cathode in order to separate a gas generated from the anode and a gas generated from the cathode from each other. The partition has wall surfaces that are each opposite a surface of the electrode. The wall surfaces have, in lower end-side regions thereof, ribs extending in a direction that has a lateral direction component. The ribs and the partition are made of a fluororesin and are integrally formed.