Electrolytic production of alkaline peroxide solutions
AssigneeCanadian Patents and Development Limited
InventorsColin William Oloman, Alan Paul Watkinson
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Abstract
A novel electrolytic cell and process are described for producing alkaline peroxide solutions. The cell has an anode and cathode in spaced apart relationship, with the cathode being in the form of a fluid permeable conductive mass e.g. a packed bed of graphite particles, separated from the anode by a barrier wall. This barrier wall can be either a cation specific membrane dividing the cell into separate cathode and anode chambers or an insulating mesh permitting free flow of electrolyte between the cathode and anode. An aqueous alkaline electrolyte and oxygen are passed through the cathode bed and the peroxide is generated in the solution within the cathode bed. The alkaline peroxide obtained is directly usable in wood pulp bleaching operations.
Claims16
A process for producing an alkaline peroxidecontaining solution by the electrolysis of an alkaline electrolyte in an electrolytic cell, which comprises passing an aqueous alkaline electrolyte and oxygen simultaneously in a direction normal to the electric current, through a fluid permeable conductive mass forming a cathode bed in said cell, said bed being separated from the anode by a barrier wall, whereby alkaline peroxide is generated in the solution within the cathode bed by reaction between the aqueous alkaline electrolyte and oxygen on the surfaces of the fluid permeable conductive mass forming the cathode bed.
Dependencies are inferred from the claim text.