Method for extraction of iron aluminum and titanium from coal ash
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United States of America Patent
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Jan 28, 1986
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N/A
app pub date -
Oct 24, 1984
filing date -
Oct 24, 1984
priority date (Note) -
Expired
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Abstract
A method is disclosed for the recovery of iron, aluminum and titanium from coal ash. The method comprises magnetically extracting magnetite from the ash, leaching the ash with a solution of a mineral acid, precipitating and removing titanium and iron hydroxides from the leach solution by adding thereto a solution of a strong base, and precipitating and removing aluminum hydroxide by contacting the remaining solution with carbon dioxide or aluminum hydroxide seeding.
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