How to precipitate Al(OH)3 from potassium aluminate in KOH?

[Antwerp]

How to precipitate aluminium hydroxide Al(OH)3 from potassium aluminate K2Al2O4 which is dissolved in potassium hydroxide KOH? Are there any seeding agents which could be used? What will be the resulting compound(s) (ions) of the reaction(s)? Alternatively other methods how to make aluminium precipitate?

Any information on this topic appreciated.

Many thanks!

 

[Borek]

Hint: aluminum is amphoteric.

 

[Antwerp]

so adding an acid to the solution?

and what about other ways (without changing pH)? it doesn't necessarily need to be Al(OH)3 precipitated, could be in other form, the important thing is to get aluminium in the form of solid...

thanks!