PROCESS FOR PURIFYING HYDROXIDE COMPOUNDS

PROBLEM TO BE SOLVED: To provide a method of obtaining regenerated solution of hydroxide compounds of high concentration and purity. SOLUTION: A cation selection membrane is arranged between an anode and a bipolar membrane, and the bipolar membrane is arranged between a cation selection membrane and...

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Bibliographische Detailangaben
Hauptverfasser:	SHARIFIAN HOSSEIN, MOONEY JOHN E
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS THEREOF ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of obtaining regenerated solution of hydroxide compounds of high concentration and purity. SOLUTION: A cation selection membrane is arranged between an anode and a bipolar membrane, and the bipolar membrane is arranged between a cation selection membrane and a cathode. In this way, a supply section between the cation selection membrane and the anode, a recovery section between the bipolar membrane and the cation selection membrane, and a water section between the bipolar membrane and the cathode are prescribed. Next, solution of ionic compounds of first concentration is fed to the water section, and water is fed to the recovery section. Furthermore, solution containing hydroxide compounds of second concentration is fed to the supply section, and also an electrochemical cell is energized to form hydroxide compounds of third concentration in the recovery section. And the hydroxide compounds are recovered from the recovery section.