Abstract:
PROBLEM TO BE SOLVED: To provide a method for electrochemically oxidizing at least one kind of organic compound by bringing the organic compound into contact with an anode. SOLUTION: The anode comprises a carrier of conductive material and a conductive anodically polarized layer formed on the carrier on the spot by deposition. By the method for oxidizing an organic compound, high space-time yield and high selectivity are attained, the oxidation of solvent is minimized, and the current density is increased.
Abstract:
PROBLEM TO BE SOLVED: To reduce the energy consumption in the manufacture by maintaining the dynamic condition of an alkali metal amalgam forming an anode. SOLUTION: A liquid anode preferably maintains its dynamic condition by the stirring under the atmospheric pressure or the pressure slightly higher than the atmospheric pressure, or the circulation by a pump, or the combination thereof. An anode area and a cathode area are separated from each other by a solid electrolyte which is an alkali metal ion conductor through which helium is impermeable. For example, appropriate solid electrolytes in manufacturing sodium include sodium β"-alumina, and sodium p-alumina. The manufacturing temperature is preferably 310-400 deg.C for sodium, and 260-400 deg.C for potassium. The current density during the manufacture is generally >=250 A/m2, but preferably 0.5-10 kA/m2 for sodium, and 0.3-3 kA/m2 for potassium.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for separating lithium from lithium amalgam. SOLUTION: In the method for separating the lithium from the lithium amalgam by electrolysis using a solid lithium ion conductive body, the lithium ion conductive body has composition of Li 4-X Si 1-X P X O 4 (wherein, X is 0.3-0.7). COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a solid potassium ion conductor having β"-Al 2 O 3 structure, its manufacturing method, and a manufacturing method of potassium using the potassium ion conductor. SOLUTION: The solid potassium ion conductor is obtained by embedding an polycrystalline alkali metal β"-Al 2 O 3 moulding into an oxide powder containing potassium and aluminum, heating it to at least 1,100 °C at least at 100°C/Hr and, further to 1,300°C, and after maintaining for at least one hour, cooling it. The potassium metal is obtained by using potassium amalgam as a material, and by producing by electrolysis by using an anode 16 containing the potassium amalgam and a cathode 17 made of a liquid potassium metal filled inside the solid electrolyte tube 1 made of the solid potassium ion conductor, and by leading into a container 20 in an inactive atmosphere filled with paraffin, and by solidifying in a shape of a globe 23. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an improving method as to an electrochemical production of metallic lithium high in energy efficiency. SOLUTION: By using a method consisting of a stage (I) in which lithium amalgam is produced from and aq. soln. of at least one kind of lithium salt and a stage (II) in which, using an anode contg. lithium amalgam, a solid electrolyte having lithium ion conductivity and a cathode of fused lithium, electrolysis is executed while the driving state of lithium amalgam as the anode is maintained, starting from the aq. soln. of at least one kind of lithium salt, metallic lithium is produced.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a lithium ion conductor for recovering lithium from lithium amalgam. SOLUTION: The solid lithium ion conductor having the composition, Li 4-X Si I-X P X O 4 (wherein, X is 0.3 to 0.7) is prepared by shaping and calcining Li 4-X Si I-X P X O 4 (wherein, X is 0.3 to 0.7) and/or a compound converted into the same during the calcination, wherein Li 4-X Si I-X P X O 4 and/or the compound converted into the same during the calcination are/is used in a state of powder having ≤5 μm average particle diameter. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To energically preferably produce sodium and potassium. SOLUTION: This electrolytic cell being a stirred state comprises an alkali metal amalgam-contg. anode, a solid electrolyte having alkali metal ion conductivity and a cathode. The solid electrolyte and the cathode are mutually divided through an electrolytic soln. As the electyrolyte, dissolved NaOH, NaNH2 or a mixture thereof, or dissolved KOH, KNH2 or a mixture of is used, and the solid electrolyte can be selected from the group consisting of sodium β-alumina, sodium β"-alumina and β/β"-alumina or the group consisting of potassium β-alumina, potassium β" and potassium β/β"-alumina.
Abstract:
PROBLEM TO BE SOLVED: To electrochemically reduce an org. compd. in a high space-time yield by bringing the org. compd. into contact with a conductive substrate and a cathode having a conductive polarized layer formed formed on the substrate by deposition. SOLUTION: Adiponitrile is reduced to hexamethylenediamine in a split electrolytic cell divided into a cathode compartment and an anode compartment with a cation-exchange membrane as a separation medium. In this case, a filter plate covered with the longitudinally diagonal woven fabric of steel alloy is used sa the cathode, a Ti plate coated with a Ta-Ir mixed oxide is used as the anode, and 2% sulfuric acid is employed as the anolyte, and the mixture of methanol, water, NaOH, adiponitrile and Raney nickel as the catholyte. Raney nickel is previously deposited on a cathode and then electrolytically reduced at 30-40 deg.C and 1000A/m current density. NaOH is removed by electrolysis, and the product is separated by distillation to recover hexamethylenediamine.
Abstract:
Electrochemically reducing an organic compound comprises: contacting the compound with a cathode comprising a support of electrically conducting material and an electrically conducting, cathodically polarised layer formed on this by sedimentation in situ.