Process for regenerating spent seed materials used in magnetohydrodynamic power generation
AssigneeAllied Corporation
InventorsKrishnamurthy N. Mani, Frederick P. Chlanda
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Abstract
A process for regenerating spent seed materials used in magnethohydrodynamic power generation, such materials comprising an alkali metal carbonate and an alkali metal sulfate as the contaminant which process comprises the steps of introducing an aqueous solution of the spent seed materials into the acid zone of an electrodialysis cell, introducing an aqueous solution of carbon dioxide, an alkali metal carbonate, an alkalimetal bicarbonate or mixture thereof into the base zone of the cell, and thereafter passing a direct current through the cell producing an alkali metal carbonate in the base zone and an alkali metal bisulfate or sulfuric acid in the acid zone.
Claims18
A process for converting alkali metal sulfate compounds into the corresponding metal carbonate which comprises the steps of:
- (a) introducing an aqueous solution comprising an alkali metal sulfate into the acid zone of an electrodialysis cell including one or more acid and base zone pairs, arranged in alternating fashion between an anode and a cathode, said acid zone of each of said pairs being located between a cation face of a bipolar membrane and a face of a cation permselective membrane, and said base zone of each of said pairs being located between an anion face of said bipolar membrane and a face of a cation permselective membrane;
- (b) introducing an aqueous solution comprising carbon dioxide, an alkali metal carbonate, alkali metal bicarbonate or a mixture thereof into said base zone;
- and
- (c) passing direct current through said electrodialysis cell thereby producing an aqueous solution comprising an alkali metal carbonate in said base zone, and an aqueous solution comprising an alkali metal bisulfate or sulfuric acid in said acid zone.
In an improved process for converting spent seed from a magnetohydrodynamic power generating process, said seed comprising potassim sulfate, or a mixture of potassium sulfate and potassium carbonate, said improvement comprising the steps of:
- (a) introducing an aqueous solution comprising said spent seed into the acid zone of an electrodialysis cell including one or more acid zone and base zone pairs, each of said pairs positioned between an anode and a cathode such that said acid zones and said base zones are arranged in alternating fashion, said acid zone of each of said pairs being located between a cation face of a bipolar membrane and a face of a cation permselective membrane, and said base zone of each of said pairs being located between an anion face of said bipolar membrane and a face of a cation permselective membrane;
- (b) introducing an aqueous solution comprising potassium carbonate in said base zone;
- and
- (c) passing direct current through said cell producing a potassium carbonate enriched solution in said base zone.
Dependencies are inferred from the claim text.