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Verfahren zur Reinigung von Sole
Description
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Na2 SO4 + Ca (OH)2 = 2 Na OH + Ca SOi nur bis zu technisch nicht verwertbaren Mengen des angewendeten Natriumsulfates sich vollzieht.
Na2 SO1 + Ca (OHJ2 = Ca SOi + 2NaOH
Claims (1)
Hide Dependent
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- Patent-Anspruch:Abänderung des durch Patent 140604 geschützten Verfahrens zur Vermeidung von Krustenbildung beim Eindampfen von Sole im Vakuum, gekennzeichnet "durch den Ersatz der Zugabe von kalkfällenden Mitteln durch Erzeugung von Soda in der Sole aus dem zugesetzten leichtlöslichen Sulfat dadurch, daß man Ätzkalk ·— event, gleich zusammen mit dem Sulfat — in solcher Menge der Sole zusetzt, daß die Sole schließlich einen dem in ihr noch vorhandenen Kalkgehalt entsprechenden oder diesen übersteigenden Gehalt an freiem Alkali zeigt, und dann ' die filtrierte Sole mit Kohlensäure behandelt, bis das freie Alkali in Monokarbonat umgewandelt ist.