Generation of aluminum hydroxide from industrial waste

Hydrogen generation conditions for industrial use of aluminum hydroxide, which is produced as a byproduct of hydrogen generation reactions, were investigated experimentally. Powders of by-products obtained under the existing experimental conditions of hydrogen generation were quantitatively analyzed using an XRD analyzer. It was found that about 60% of the by-product was aluminum hydroxide, about 8% was unreacted aluminum, and about 20% was baemite (AlOOH), which is a type of aluminum hydroxide but has a different crystal form. Based on these results, the addition of sodium hydroxide and the setting of the reaction temperature were examined. As a result, it was confirmed that the purity of aluminum hydroxide was improved by suppressing the formation of baemite and decreasing the ratio of unreacted aluminum compared to existing methods.