Chemistry & Chemical Technology. – 2016. – Vol. 10, No. 4

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The scientific-technical journal

It is the scientific-technical journal in English in Ukraine discussing actual problems of chemistry and chemical technology. Compared with other chemical journals Ch&ChT is publishing materials of both theoretical and practical values in such fields as analytical, general organic, physical and inorganic chemistry; chemistry of high molecular compounds; materials science and engineering; chemical kinetics and catalysis; technology of inorganic substances; technology of organic synthesis products; chemical technology of processing of combustible minerals; processes and apparatus of chemical and food productions; biotechnology and ecology.

Chemistry & Chemical Technology : [the scientific-technical journal] / Lviv Polytechnic National University ; editor-in-chief M. Bratychak. – Lviv : Publishing House of Lviv Polytechnic National University, 2016. – Volume 10, number 4. – P. 387–518 : ill.

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Author: search.filters.author.Kravchenko, Alexander

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    Obtaining of high purity amorphous silicon dioxide from rice husk
    (Publishing House of Lviv Polytechnic National University, 2016) Gridneva, Tatiana; Kravchenko, Alexander; Barsky, Vadim; Gurevina, Natalia
    Using maximum extraction of carbon-containing components the content of amorphous silicon dioxide was increased in the rice husk solid residue. In accordance with the hypothesis about the mechanism of extracting carbon-containing components from rice husk by liquid extractants, proper extractants were selected. The effect of main technological factors including a process temperature, time and concentration of the extractants was determined. Внаслідок максимального вилучення карбон-вмісних компонентів, підвищено вміст аморфного силіцій(IV) оксиду у твердому залишку рисового лушпиння. Вибрано екстрагенти відповідно до гіпотези про механізм екстрагування карбонвмісних компонентів з рисового лушпиння рідкими екстрагентами. Встановлено вплив основних технологічних чинників: температура, час процесу та концентрація екстрагенту.