BRINE ACIDIFICATION WITH SIMULTANEOUS PRODUCTION OF ALKALI METAL HYDROXIDE AND HYDROCHLORIC ACID BY 3-COMPARTMENT ELECTRODIALYTIC WATER SPLITTING

A three-compartment electrodrolytic water splitter having alternating cation, bipolar, and anion membranes is used to remove alkali metal cations from an aqueous alkali metal chloride solution so as to produce an acidified salt solution. The co-products are a base, such as aqueous NaOH or KOH, and a...

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Bibliographische Detailangaben
Hauptverfasser:	CHLANDA, FREDERICK P, MANI, KRISHNAMURTHY N
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	A three-compartment electrodrolytic water splitter having alternating cation, bipolar, and anion membranes is used to remove alkali metal cations from an aqueous alkali metal chloride solution so as to produce an acidified salt solution. The co-products are a base, such as aqueous NaOH or KOH, and aqueous HCl. The acidified salt solution is then fed to an anode compartment of a membrane or diaphragm electrolytic cell for production of chlorine and alkali metal hydroxide.