Abstract：Nanosized Al(OH)3 powder was prepared by the carbonation method from sodium aluminates solution and carbon dioxide. The influence of concentration of reactant, rotating speed of rotating packed bed and ratio of gas-liquid flow rate on Al(OH)3 particle size in the preparation process was investigated. The optimal operating optimum conditions were determined as follows: sodium aluminates 120 g/L, ratio of gas-liquid flow rate 1.5~4.0, rotating speed 1200 r/min. Adding surface modifier TEBAC/PO43- is helpful to the control of agglomeration of Al(OH)3 particles. The product was characterized by TEM and XRD. The prepared particles are monoclinic and well-dispersed with a mean size of 20 nm .
2003, Vol. 3 
