Products of aluminum sulfate electrolysis

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SUMMARY

Electrolyzing a solution of aluminum sulfate does not straightforwardly yield aluminum and sulfuric acid due to aluminum's high reactivity, which often leads to the electrolysis of water instead, producing hydrogen. Similar to zinc sulfate electrolysis, where zinc can be deposited with the right bath composition, aluminum can also be produced using nonaqueous solutions or molten salts. This method aligns with industrial practices for aluminum production.

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  • Understanding of electrolysis principles
  • Knowledge of aluminum sulfate chemistry
  • Familiarity with nonaqueous solutions and molten salts
  • Experience with electrodeposition techniques
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  • Research the electrolysis of aluminum sulfate solutions
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Chemists, materials scientists, and engineers involved in electrochemical processes and aluminum production will benefit from this discussion.

SMD1990
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I could not find anything online indicating that such was so, but...

If electrolysis of a solution of zinc sulfate results in zinc and sulfuric acid, is it also correct that electrolyzing a solution of aluminum sulfate will result in aluminum and sulfuric acid?
 
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It doesn't want to be easy. Aluminum is highly reactive, so its presence in water may mean you will be just electrolyzing water and producing hydrogen, instead of depositing aluminum. That being said, zinc is also reactive, yet with a correct choice of bath composition, it can be electrodeposited on steel.

It can be easier to use nonaqueous solution, or even some molten salt. After all, that's more or less how the Al is produced.
 

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