Ppg Industries, Inc.

Ronald D Chamberlin

Harlan B Johnson

Malcolm Korach

Howard H Hoekje

Disclosed is a method of operating an electrolytic cell having an active, catalytic cathode and an iron structure in contact with an alkaline electrolyte. The dissolution of iron into the electrolyte is reduced by a sacrificial anode in proximity to, and preferably in contact with, the iron structure.

Prevention of corrosion of electrolyte cell components

Discloses a method of operating a chlor-alkali cell having a low hydrogen overvoltage cathode and exposed high hydrogen overvoltage metal structure within the cathode compartment, where a composition of sodium nitrite and sodium benzoate is added to the catholyte to avoid corrosion of the exposed, high hydrogen overvoltage metal.

Method of operating an electrolytic cell

Disclosed is a method of cathode-diaphragm where the cathode is coated with a protective film, and thereafter a diaphragm is deposited thereon.

Method of preparing a cathode-diaphragm unit

Disclosed is a method of electrolyzing alkali metal chloride brine between an anode and a cathode, with oxidant feed to the cathode, where the cathode is a bed of porous particles having HO.sub.2.sup.- disproportionation catalyst. Also disclosed is an electrolytic cell for carrying out the disclosed process.

Fixed bed oxygen depolarized cathode chlor-alkali cell

Disclosed is a method of preparing a cathodic electrocatalyst where the cathode is a bed of porous particles having HO.sub.2.sup.- disproportionation catalyst dispersed on the surfaces and pores thereof.

Method of preparing electrocatalyst for an oxygen depolarized cathode

Disclosed is a method of electrolyzing alkali metal chloride brine between an anode and a cathode, with oxidant feed to the cathode, where the cathode is a bed of porous particles having HO.sub.2.sup.31 disproportionation catalyst. Also disclosed is an electrolytic cell for carrying out the disclosed process.

Brine electrolysis using fixed bed oxygen depolarized cathode

Disclosed is a method of electrolyzing an aqueous alkali metal chloride, which method comprises passing an electrolytic current from an anode of an electrolytic cell through an alkali metal chloride electrolyte to a cathode of the cell, evolving chlorine at the anode and hydrogen at the cathode. The method is characterized by the use of a cathode having a layer of an oxy-compound of a platinum group metal and an alkaline earth metal on an electroconductive cathode substrate.

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Wadsworth, OH, United States of America

Ronald D Chamberlin