Method for concentrating dilute sulfuric acid and an apparatus for concentrating dilute sulfuric acid
AssigneeOutotec Oyj
InventorsMichael Gasik, Anu Lokkiluoto, Heljä Peltola, Pekka Taskinen
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Abstract
A method for concentrating dilute sulfuric acid involves feeding dilute sulfuric acid through at least two electrolytic cells depolarized by sulfur dioxide, and through a cation conductive membrane separating the cathode and anode sides in the electrolytic cell. Also provided is an apparatus for concentrating sulfuric acid, wherein at least a first electrolytic cell is in fluid communication with a second electrolytic cell, and wherein a cation conductive membrane separates the cathode and anode sides in the electrolytic cells.
Claims22
A method for concentrating dilute sulfuric acid, comprises feeding sulfuric acid into a first of at least two electrolytic cells which are depolarized by sulfur dioxide, and wherein a cation conductive membrane separates the cathode and anode sides in the electrolytic cells.
An apparatus for concentrating dilute sulfuric acid, comprises at least a first electrolytic cell depolarized by sulfur dioxide and a second electrolytic cell depolarized by sulfur dioxide, wherein the second electrolytic cell is configured for receiving sulfuric acid concentrated in the first electrolytic cell from the first electrolytic cell, and which apparatus comprises a cation conductive membrane for separating the cathode and anode sides in the electrolytic cells.
Dependencies are inferred from the claim text.