Porous diaphragms for electrolytic cells having non-uniform hydrophobicity
AssigneeOlin Corporation
InventorIgor V. Kadija
Life of this patent
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Abstract
A porous diaphragm for an electrolytic cell for the electrolysis of alkali metal halides is comprised of a thermoplastic support fabric impregnated with particles of a siliceous composition. The thermoplastic support fabric has an anode side, a cathode side opposite the anode side, and a thickness of at least 0.3 millimeters. The cathode side has a greater hydrophobicity than the anode side. To provide greater hydrophobicity which results in controlled, reduced cell voltages, for example, the cathode side of the support fabric is treated with an oxidizing agent.
Claims10
A porous diaphragm for an electrolytic cell for the electrolysis of alkali metal halides comprised of a thermoplastic support fabric impregnated with particles of a siliceous composition, said thermoplastic support fabric having an anode side, a cathode side opposite said anode side, and a thickness of at least 0.3 millimeters, said cathode side having a greater hydrophobicity than said anode side.
A porous diaphragm for an electrolytic cell for the electrolysis of alkali metal halides comprised of a thermoplastic support fabric impregnated with particles of a siliceous composition, said thermoplastic support fabric having an anode side, a cathode side opposite said anode side, and a thickness of at least 0.3 millimeters, said cathode side having been treated with an oxidizing agent to provide greater hydrophobicity than that of said anode side of said porous diaphragm.
Dependencies are inferred from the claim text.