Obtaining of High Purity Amorphous Silicon Dioxide from Rice Husk

Abstract

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.

Studying the kinetics of extraction treatment of rice husk when obtaining silicon carbide

“…The empirical formula of cellulose is (С 6 H 10 O 5 ) n . When cellulose is treated with concentrated acids, the formation of jelly-like sediment is observed, which is difficult to separate from the insoluble part of the rice husk [23]. Therefore, the diluted aqueous solutions of sulphuric acid were used in our study.…”

Technical research and development

“…Many researchers have established the feasibility of using crushed vegetable waste in various industries. In particular, the products of fine grinding of vegetable waste can be the final product and can be used for energy purposes [431], as feed in agriculture [432,433], or be an intermediate product in the production of plastic composites [434,435], in technology obtaining silicon dioxide [436], silicon carbide…”

Характеристика Діоксиду Кремнію, Отриманого Із Рисового Лушпиння

“…Elaborate purification of raw materials of plant origin from impurities, such as metal ions, lignin, and cellulose, is possible using the double extraction method [24]. The method involves two successive chemical treatments of the raw material prior to heat treatment.…”

“…The purpose of this study is to identify the main characteristics of silicon dioxide obtained from rice husk using chemical purification by double extraction [24].…”