Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed

The addition of active seed for increasing the precipitation rate leads to formation fine Al(OH)3 particles that complicates separation solid from mother liquor. In this study, enhanced coarse sodium aluminate solution using agglomerated was investigated. Aluminum salt (Al2(SO4)3) were used at initial process. About 50% obtained when these agglomerates as a in amount 20 g L−1 25 °C within 10 h. and precipitate samples characterized X-ray diffraction (XRD), scanning electron microscopy (SEM) Fourier-transform infrared spectroscopy (FTIR). SEM images showed consist flake-like can be stick together by bayerite (β-Al(OH)3) acting binder. temperature above 35 high concentration free alkali (αk = 1.645Na2Ok/Al2O3 > 3) lead refinement associated with dissolution.