Carbothermic production of aluminum
AssigneeAluminum Company of America
InventorC. Norman Cochran
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Abstract
A process for producing aluminum, including the steps of forming from Al.sub.2 O.sub.3 and C in the ratio one mol Al.sub.2 O.sub.3 to 3 mols C, a first liquid of Al.sub.2 O.sub.3 and Al.sub.4 C.sub.3, creating in the first liquid a zone of increased temperature and/or decreased pressure to decompose the first liquid to a second liquid of Al and C, exhausting gases from the step of forming the first liquid without their passing through the second liquid, and recovering Al from the second liquid.
Claims9
A process for producing aluminum, comprising the steps of forming from Al.sub.2 O.sub.3 and C in the ratio one mol Al.sub.2 O.sub.3 to 3 mols C, a first liquid of Al.sub.2 O.sub.3 and Al.sub.4 C.sub.3 accompanied by the evolution of gases, creating in said first liquid a zone of increased temperature and/or decreased pressure to decompose said first liquid to a second liquid of Al and C, exhausting said gases during the step of forming said first liquid without said gases passing through said second liquid, and recovering Al from said second liquid.
Dependencies are inferred from the claim text.