Abstract: In the present work, the processes of aluminum oxyhydroxides synthesis by hydrothermal hydrolysis in water solutions and in solid phase are considered. The process studies were conducted using a batch type autoclave at temperatures from 443 to 503K at a pressure of 1.6 -2.3 MPa with the variation of such parameters as temperature, pressure, residence time of the reaction mixture in the reactor, flow velocity of the displacing gas during hydrolysis; number of washes, time and rate of hydrothermal decomposition products centrifugation, time and temperature of aluminium hydroxide drying. It is shown that Al-O-H product formed by hydrothermal hydrolysis of aluminum chloride hexahydrate AlCl3* 6 H2O, and urea jointly in water solutions is a highly dispersed (nano) γ-AlOOH (boehmite). Hydrothermal process of self-hydrolysis of aluminum chloride hexahydrate in solid phase with the use of crystalline water is lead to formation of bayerite (mainly) and aluminum oxychlorides with a total Cl content of not more than 4%.

Cite: Dobrynkin N.M. , Batygina M.V. , Noskov A.S.
Synthesis of Oxide Materials by Hydrothermal Hydrolysis of Aluminum Chloride Hexahydrate
37th International Conference and Exhibition of ICSOBA in cooperation with 25th “Aluminium of Siberia” Conference within XI International Congress & Exhibition “Non-Ferrous Metals and Minerals” 16-20 Sep 2019