Synthetic reaction of aluminum isopropoxide, which is used as a starting material for catalytic-grade alumina, has been studied in the presence of a small amount of HgI2, HgCl2, I2 or FeCl3 from aluminum dross. It was synthesized by solid-liquid reaction between the aluminum metal and isopropyl alcohol, using vacuum distillation process. The purity of the synthesized aluminum isopropoxide was obtained over 97.6% experimentally, which had been analyzed quantitatively by complexometric method. The initial amount of sodium, which directly affects the catalytic activation in the alumina catalyst, was in the range of 0.926 to 1.563 wt% in the aluminum dross. Finally, it was decreased to 0.007 wt% in the aluminum isopropoxide product. Yield was changed according to the amount of aluminium existing in the aluminum dross. Aluminum could mostly be recovered regardless of the amount of aluminium existing in the aluminum dross.