Selective cathode for use in electrolytic chlorate process
AssigneeNouryon Chemicals International B.V.
InventorsMats Patrik Wildlock, Nina Natalija Helene Simic, Ann Maria Cornell, Balázs Endrödi, Aleksandra Lindberg
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Abstract
The present disclosure relates to a process for the production of alkali metal chlorate in a single compartment electrolytic cell, which avoids the need for addition of sodium dichromate to the process, in which unwanted side-reactions are reduced by using a cathode having an electrocatalytic top layer on a substrate that optionally also has one or more intermediate layers. The top electrocatalytic layer comprises an oxide of manganese and/or cerium.
Claims20
A process for producing alkali metal chlorate, comprising introducing an electrolyte solution, free of added chromium, said solution comprising alkali metal chloride to a non-divided electrolytic cell comprising at least one anode and at least one cathode, and electrolyzing the electrolyte solution to produce an electrolyzed solution enriched in chlorate, wherein at least one cathode comprises a conductive electrode substrate which may be coated with one or more intermediate conductive layers, and an electrocatalytic top layer applied onto said substrate or onto intermediate layers, said top layer comprising cerium oxide and/or manganese oxide.
A process for producing alkali metal chlorate, comprising introducing an electrolyte solution, free of added chromium, said solution comprising alkali metal chloride to a non-divided electrolytic cell comprising at least one anode and at least one cathode, and electrolyzing the electrolyte solution to produce an electrolyzed solution enriched in chlorate, wherein at least one cathode comprises a titanium substrate which may be coated with one or more intermediate conductive layers, and an electrocatalytic top layer applied onto said substrate or onto intermediate layers, said electrocatalytic top layer comprising Mn2O3, β-MnO2, and/or CeO2.
Dependencies are inferred from the claim text.