Method for extraction of iron aluminum and titanium from coal as

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal

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423 82, 423 85, 423127, 423132, 423140, 423150, C01G 2304, C01G 4902, C01F 702

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045670269

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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