AVLAEGSNING AV METALL UR LOESNINGAR

Trace metals such as copper and cadmium are removed from a solution such as a zinc sulphate electrolyte by electrolysis using a particulate bed cathode or a reticulate cathode. Electrolysis is carried out to deposit a relatively electronegative metal which is then used to cement out a less electrone...

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Bibliographische Detailangaben
1. Verfasser:	VANCE CHRISTOPHER JOHN
Format:	Patent
Sprache:	fin
Schlagworte:	APPARATUS THEREFOR CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	Trace metals such as copper and cadmium are removed from a solution such as a zinc sulphate electrolyte by electrolysis using a particulate bed cathode or a reticulate cathode. Electrolysis is carried out to deposit a relatively electronegative metal which is then used to cement out a less electronegative metal from solution. Usually, the more electronegative metal is a contaminant of a co-deposited less electronegative metal and in this case the cementation stage serves to purify the deposit of less-electronegative metal by dissolution of the more-electronegative metal with a simultaneous further reduction of the concentration of the less electronegative metal in solution.