Loading patent…
AssigneeJX Nippon Mining & Metals Corporation
InventorsKouichi Takemoto, Toru Imori, Takashi Ouchi, Hirofumi Takahashi
Estimating the term…
Provided is a method for manufacturing high purity tin including: depositing electrodeposited tin on the surface of a cathode 11 by electrowinning in an electrolytic bath in which a diaphragm 14 is placed between an anode 12 and the cathode 11, by using a raw material for tin as the anode 12 and a leachate obtained by electrolytically leaching the raw material for tin in a sulfuric acid solution as an electrolytic solution, the electrolytic solution containing a smoothing agent for improving a surface property of the electrodeposited tin; discharging the electrolytic solution from the electrolytic bath such that lead in the discharged electrolytic solution is removed; and putting the electrolytic solution from which lead is removed back into the electrolytic bath.
A method for manufacturing high purity tin, the method comprising:
An electrowinning apparatus for high purity tin, the apparatus comprising:
High purity tin, wherein the content of lead is less than 0.05 ppm, the content of antimony is less than 0.5 ppm, the content of copper is less than 0.1 ppm, the content of sulfur is 0.5 ppm or less, and the α ray count is 0.001 cph/cm2 or less.
Dependencies are inferred from the claim text.