Processes for treating aluminium dross residues

Details Processes for treating aluminium dross residues Processes for treating aluminium dross residues

C - Chemistry, Metallurgy

01

F

C01F 7/56 (2006.01) C01F 7/30 (2006.01) C22B 3/08 (2006.01) C22B 3/10 (2006.01)

Patent

CA 2610918

There is provided a process for preparing aluminium chloride comprising: leaching aluminium dross residues with HCI so as to obtain a mixture comprising a solid and a liquid; and hydrochlorinating the liquid obtained from the mixture, so as to form a precipitate comprising aluminium chloride. Such a sequence can also be used for preparing alumina. In such a case, the process can further comprise the step of converting the so-obtained aluminium chloride into alumina. In the processes previously defined, the solid so-obtained can also be leached with H2SO4, thereby generating a leachate. The leachate can also eventually be hydrochlorinated so as to increase the yield of the desired product obtained i.e. alumina or aluminium chloride.

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