Production of Alumina from Aluminum Nitrate Solutions.
Eichbaum-BR; Eisele-JA; Bauer-DJ
U S Pat 4 260 589 1981 Apr; :
The al(no3)3 in a solution is hydrolyzed in a reaction vessel at 250 deg-350 deg c while the pressure is maintained at approximately 60 psi by allowing the steam and nitrogen oxides to escape continuously. The product is a noncrystalline al2o3 that is easily washed with water and readily converted to a crystalline form at 750 deg-1,000 deg c. The steam and nitrogen oxides from the reaction vessel are discharged into a chamber containing clay for acid treatment.
U.S. Pat. 4,260,589, Apr. 7, 1981; Chem. Abstr. 93:10,351Z