ELECTRODIALYTIC TREATMENT METHOD

ELECTRODIALYTIC TREATMENT METHOD

PURPOSE:To fractionally recover NaCl with high purity from a mixed soln. of Na, Ca, Cl and SO4. CONSTITUTION:This electrodialytic apparatus is constituted of an electrodialytic cell 1, a desalted soln. tank 21, a divalent ion concn. tank 22, a conc. soln. tank 23, a desalted soln. pump 24 and a conc...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YOSHIOKA CHIKAKO, KUROKAWA HIDEAKI
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:PURPOSE:To fractionally recover NaCl with high purity from a mixed soln. of Na, Ca, Cl and SO4. CONSTITUTION:This electrodialytic apparatus is constituted of an electrodialytic cell 1, a desalted soln. tank 21, a divalent ion concn. tank 22, a conc. soln. tank 23, a desalted soln. pump 24 and a conc. soln. pump 25. A mixed soln. 31 of Na, Ca, Cl and SO4 is sent to the electrodialytic cell 1 and Ca and Na as well SO4 and Cl adsorbed on the monovalent ion permselective ion exchange membranes 12, 13 in the cell 1 are exchanged to adsorb Na and Cl on the membranes while a conc. sol. 33 of Ca and SO4 is recovered in the divalent ion concn. tank 22. In the same way, the mixed soln. 31 is sent to the electrodialytic cell 1 and Na and Cl are selectively transmitted through the monovalent ion permselective ion exchange membranes 12, 13 to recover a high purity NaCl soln.