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1. (WO2016049777) METHODS FOR PURIFYING ALUMINUM IONS

Pub. No.:    WO/2016/049777    International Application No.:    PCT/CA2015/050998
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Sat Oct 03 01:59:59 CEST 2015
IPC: C22B 3/10
C01F 7/02
C01F 7/56
C22B 3/42
C22B 3/46
C22B 21/00
Applicants: ORBITE TECHNOLOGIES INC.
Inventors: BOUDREAULT, Richard
FOURNIER, Joël
DUMONT, Hubert
SAMUEL, Jean-françois
BOUFFARD, Jonathan
LEPAGE, Sophie
HUARD, Ann-christine
GRAVEL-ROULEAU, Claudia
LABRECQUE-GILBERT, Marie-Maxime
Title: METHODS FOR PURIFYING ALUMINUM IONS
Abstract:
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.