TREATMENT FOR COPPER SCRAP

PURPOSE:To recover tin minimal in impurity content and also to form copper base material into products with obviating the necessity of the application of other treatments, by immersing tinned or solter-plated copper scrap in a solution of copper sulfate. CONSTITUTION:The copper scrap which is tinned...

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Bibliographische Detailangaben
Hauptverfasser:	NARITA KATSUTOSHI, TAKAZAWA YOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To recover tin minimal in impurity content and also to form copper base material into products with obviating the necessity of the application of other treatments, by immersing tinned or solter-plated copper scrap in a solution of copper sulfate. CONSTITUTION:The copper scrap which is tinned or plated with solder is immersed in the copper-sulfate solution, by which tin is leached out by substitution for copper. As the above leach liquor, the one having 50-150g/l sulfuric acid concentration and 5-20g/l copper concentration is suitably used and, moreover, it is desirable that Sn concentration in the leach liquor is regulated to