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US 11,746,021 B2Granted
High purity aluminum oxide via electrodialysis
AssigneeNextchem S.P.A.
InventorJoseph J. Stevens, III
Life of this patent
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Abstract
The invention describes methods for the production of a high purity aluminum salt solution via electrodialysis, and ultimately, the conversion of the high purity aluminum salt to high purity aluminum oxide.
Claims20
A method for the production of aluminum oxide comprising the steps:
- providing an aluminum salt in an initial aluminum salt solution;
- subjecting the initial aqueous aluminum salt solution to electrodialysis to remove non-aluminum monovalent and/or multivalent cations from the initial aqueous aluminum salt solution, wherein a purified aqueous aluminum salt solution is produced with a reduction of non-aluminum monovalent and/or multivalent cations from the initial aqueous aluminum salt solution;
- and subjecting the purified aluminum salt solution to heating to provide aluminum oxide.
A method for the removal of non-aluminum monovalent and/or multivalent metal cations from an aqueous aluminum salt solution to provide aluminum oxide comprising the steps:
- providing an aluminum salt in an initial aluminum salt solution;
- subjecting the initial aqueous aluminum salt solution to electrodialysis to remove non-aluminum monovalent and/or multivalent cations from the initial aqueous aluminum salt solution, wherein a purified aqueous aluminum salt solution is produced with a reduction of non-aluminum monovalent and/or multivalent cations from the initial aqueous aluminum salt solution;
- and subjecting the purified aluminum salt solution to heating to provide the aluminum oxide.
Dependencies are inferred from the claim text.