Recovery of gold from potassium iodide-iodine etching solution
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United States of America Patent
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Sep 1, 2009
Grant Date -
Sep 20, 2007
app pub date -
Mar 28, 2007
filing date -
Sep 28, 2004
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Abstract
A process for the recovery of gold from a potassium iodide-iodine solution is provided. The gold is precipitated from the solution using a weak acid, (e.g. ascorbic acid), a buffer, (e.g. sodium bicarbonate), and a dye. The precipitate is then removed from the solution resulting in the recovery the gold precipitate and the potassium iodide-iodine solution.
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