M. A. Medkov, G. F. Krysenko, E. E. Dmitrieva, E. B. Merkulov, S. I. Ivannikov
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引用次数: 0
Abstract
The results of a study on the interaction of loparite concentrate with ammonium sulfate are presented. It was found that the reactions of the main components of the concentrate with (NH4)2SO4 begin after the thermal decomposition of ((NH4)2SO4 with the formation of ammonium hydrosulfate and proceed in the temperature range of 280–350°C to form double sulfates of ammonium and the elements contained in the concentrate. It was shown that aqueous leaching of the reaction product at 340°C followed by holding the resulting solution at 80°C makes it possible to completely precipitate titanium, niobium, and tantalum as hydroxides, while transferring the rare-earth elements into the solution.
期刊介绍：
Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.
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