Method for recovery of copper from copper-containing materials
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United States of America Patent
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Dec 22, 1992
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N/A
app pub date -
May 30, 1990
filing date -
May 30, 1990
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Expired
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Abstract
A process for precipitating solid hydrates of cupric tetrammine sulfate from a solution, wherein the solution contains at least 40 grams per liter of free ammonia, at least 50 grams per liter of ammonium sulfate and wherein the temperature of the solution is less than 21.degree. C. The hydrates of cupric tetrammine sulfate can be converted to additional useful copper compounds.
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