TREATMENT METHOD FOR SUBSTANCE CONTAINING Sn, Pb AND Cu

PROBLEM TO BE SOLVED: To provide a low-cost means by which, from a substance containing Sn, Pb and Cu, Pb is separated from Sn and Cu. SOLUTION: Treatment where a substance containing Sn, Pb and Cu, e.g., dross generated in a Pb refining stage is immersed into a sulfuric acid aqueous solution contai...

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Bibliographische Detailangaben
Hauptverfasser:	SUGANO MANABU, SUZUKI KAZUNARI, INOGUCHI KOSUKE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS 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 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:	PROBLEM TO BE SOLVED: To provide a low-cost means by which, from a substance containing Sn, Pb and Cu, Pb is separated from Sn and Cu. SOLUTION: Treatment where a substance containing Sn, Pb and Cu, e.g., dross generated in a Pb refining stage is immersed into a sulfuric acid aqueous solution containing a soluble chloride in which hydrogen ion concentration [H+] and Cl-concentration are controlled in such a manner that Sn and Cu are selectively leached, and also, the leaching of Pb is suppressed. In particular, a solution satisfying the following conditions can be used: (a) that the amount (mol) of Cl-in the solution is ≥two times the amount (mol) in the substance to be treated charged to the solution; (b) that the Cl-concentration is ≤1.3 mol/L; and (c) that the hydrogen ion concentration [H+] satisfies 1.0 mol/L≤[H+]≤3.5 mol/L. COPYRIGHT: (C)2005,JPO&NCIPI