The Development of the Process of Hydrothermal Decomposition of Chloride Solutions in Batch and Flow Reactors
Доклады на конференциях
Study the hydrolysis of metal chlorides is of particular interest in connection with the problems of materials science, geochemistry, general and technical chemistry and chemical engineering problems. In this study special attention special attention was paid to the development of effective methods of hydrothermal decomposition of aluminum chloride solutions to create innovative technology for hydro-chemical alumina production from kaolin raw material.
The study of influence of the process conditions such as pH values, temperature, ionic strength, the presence of coagulants and surfactants, and other components (additives) showed the possibility of process control deposition of metal hydroxides and controlling the formation of oxide materials of desired texture. The possibility of hydrolysis of aluminum chloride under hydrothermal conditions the temperature range below 250 ° C is shown experimentally.
Hydrothermal process for producing aluminum hydroxide provides:
a) processing of aluminum-chloride solutions with AlCl3 content over a wide range from 11 to 21%;
b) preparing at least 90% of aluminum hydroxide from aluminum-chloride solution as a filterable precipitate;
c) the content of chloride ion in dried to constant weight aluminum hydroxide is not more than 4%;
d) obtaining products with alumina predetermined morphology and texture.