Aluminum alkoxide, $Al(OC_3H_7^i)_3;and;Al(OC_4H_9^s)_3$, were synthesized using aluminum sheet and corresponding alcohols to prepare various phase alumina in high purity. Aluminum hydroxides were prepared by hydrolysis of synthesized Al-alkoxides and from reagent $AlCl_3$. The catalytic properties of ${gamma}$ and ${eta}-Al_2O_3$ prepared at various temperatures were investigated and the reaction kinetics of ${alpha}-Al_2O_3$ formation from $Al(OH)_3$ was considered.