Process and apparatus for recovery of precious metal compound
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United States of America Patent
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Nov 14, 1989
Grant Date -
N/A
app pub date -
May 16, 1987
filing date -
May 16, 1986
priority date (Note) -
Expired
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Abstract
A process and an apparatus for recovering a precious metal compound, in which the precious metal compound is separated from impurity metals by use of a reverse osmotic membrane, and the separated precious metal compound is recovered in a concentrated state through electrodialysis employing anion-exchange and cation-exchange membranes, whereby the precious metal compound in a process liquid can be recovered efficiently. When the recovered precious metal compound is added in the as-is form to precious metal plating solution, it is possible to control the plating solution.
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