caa a22 4500 445850760 CHVBK 20180317145412.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1134/S0040579511050113 doi (NATIONALLICENCE)springer-10.1134/S0040579511050113 Extraction of boron and silicon in hydrodifluoride processing of a datolite concentrate [Elektronische Daten] [G. Krysenko, D. Epov, M. Medkov, E. Merkulov] The composition of volatile products upon heating of a datolite concentrate that was fluorinated with ammonium hydrodifluoride were studied; the temperature parameters of the transition of the boron and silicon compounds to the gaseous phase were determined and it was established that the difference of the volatilities of the boron and silicon fluoroammoium salts allows selective extraction of these products. A closed technical scheme for processing datolite concentrate by ammonium hydrodifluoride to produce commercial products, viz., ammonium fluoborate, boric acid, amorphous silica, and fluorite, was proposed. Pleiades Publishing, Ltd., 2011 datolite nationallicence ammonium hydrodifluoride nationallicence fluorination nationallicence sublimation nationallicence ammonium fluoborate nationallicence ammonium hexafluorosilicate nationallicence Krysenko G. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut Epov D. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut Medkov M. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut Merkulov E. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut Theoretical Foundations of Chemical Engineering SP MAIK Nauka/Interperiodica 45/5(2011-10-01), 713-716 0040-5795 45:5<713 2011 45 11236 https://doi.org/10.1134/S0040579511050113 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0040579511050113 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Krysenko G. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut NATIONALLICENCE 700 1- Epov D. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut NATIONALLICENCE 700 1- Medkov M. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut NATIONALLICENCE 700 1- Merkulov E. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia aut NATIONALLICENCE 773 0- Theoretical Foundations of Chemical Engineering SP MAIK Nauka/Interperiodica 45/5(2011-10-01), 713-716 0040-5795 45:5<713 2011 45 11236 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer