High purity copper sulfate and method for production thereof
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United States of America Patent
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Apr 13, 2010
Grant Date -
Mar 8, 2007
app pub date -
Jul 28, 2004
filing date -
Sep 4, 2003
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Abstract
Provided are high purity copper sulfate wherein the content of Ag impurities is 1 wtppm or less, and having a purity of 99.99 wt % or higher, and a manufacturing method of high purity copper sulfate including the steps of dissolving crude copper sulfate crystals or copper metal, and subjecting this to active carbon treatment or solvent extraction and active carbon treatment in order to realize recrystallization. The present invention aims to provide a manufacturing method of high purity copper sulfate capable of efficiently removing impurities at a low cost by dissolving commercially available copper sulfate crystals in purified water or acid and thereafter subjecting this to the refining process, and high purity copper sulfate obtained thereby.
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