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AssigneeOrbite Technologies Inc.
InventorsRichard BOUDREAULT, Joël FOURNIER, Hubert DUMONT, Jean-François SAMUEL, Jonathan BOUFFARD, Sophie LEPAGE, Ann-Christine HUARD, Claudia GRAVEL-ROULEAU, Marie-Maxime LABRECQUE-GILBERT
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There is provided a process for purifying aluminum ions comprising: reacting an aluminum-containing material with an acid so as to obtain a composition comprising aluminum ions; precipitating said aluminum ions in the form of AlCl3; optionally converting AlCl3 into Al(OH)3; and heating said AlCl3 or said Al(OH)3 under conditions effective for converting AlCl3 or Al(OH)3 into Al2O3 and optionally recovering gaseous HCl so-produced. Aluminum ions so purified are thus useful for preparing various types of alumina.
A process for purifying aluminum ions comprising:
The process of any one of claims 211 to 2211, wherein the concentration of gaseous HCl is increased from a value below the azeotropic point before treatment to a value above the azeotropic point after treatment.
Dependencies are inferred from the claim text.