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US 2009/0022640 A1Published application
Processes for treating aluminium dross residues
AssigneeGroupe Conseil Procd, Inc.
InventorsMartin BEAULIEU, Stephane CHABOT, Yves CHAREST, Jean-Francois SAVARD
Life of this patent
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Abstract
There is provided a process for preparing aluminium chloride comprising leaching aluminium dross residues with H2SO4 so as to obtain a leachate; and hydrochlorinating the leachate so as to obtain aluminium chloride. If desired, aluminium chloride can then be converted into alumina.
Claims25
A process for preparing aluminium chloride comprising:
- leaching aluminium dross residues with H2SO4 so as to obtain a leachate;
- and
- hydrochlorinating said leachate so as to obtain aluminium chloride.
A process for preparing aluminium chloride comprising:
- treating aluminium dross residues so as to reduce the amount of aluminium nitride present therein;
- leaching aluminium said dross residues with H2SO4 so as to obtain a leachate;
- and
- hydrochlorinating said leachate so as to obtain aluminium chloride.
1 more element
A process for preparing alumina comprising:
- optionally treating aluminium dross residues so as to reduce the amount of aluminium nitride present therein;
- leaching aluminium said dross residues with H2SO4 so as to obtain a leachate;
- hydrochlorinating said leachate so as to obtain aluminium chloride;
- and
- converting said aluminium chloride into alumina.
2 more elements
Dependencies are inferred from the claim text.