Abstract
In the present investigation, aluminum nitrate nonahydrate \({{\rm Al}({\rm NO}_{3})_{3}\cdot9{\rm H}_{2}{\rm O}}\) has been prepared using aluminum trihydrate Al(OH)3 as precursor. The reactivity of aluminum trihydrate toward nitric acid was studied as a function of water of crystallization, concentration of nitric acid, pressure, reaction time, surface area and aging. It was found dependent primarily on ignition and subsequently on other factors. During ignition, the crystalline phase transformed from gibbsite to amorphous alumina via boehmite with the ultimate reduction of reactivity to half. It was further found that nitric acid either decomposed into nitrite ions or in excess pacifies the reaction. Moreover, aging of precursor in nitric acid and its exposed surface area had critical effect on the reaction time and profoundly increased the percentage yield of aluminum nitrate nonahydrate.
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Shaheen, F., Shah, W.A., Irfan, M. et al. Development of Aluminum Nitrate Nonahydrate and Optimization of Various Reaction Parameters. Arab J Sci Eng 38, 1749–1755 (2013). https://doi.org/10.1007/s13369-012-0396-x
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DOI: https://doi.org/10.1007/s13369-012-0396-x