Получение аморфного диоксида кремния повышенной чистоты из рисовой шелухи
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Дата
2016
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
Аморфный диоксид кремния широко используется в электронике, медицине, в производстве строительных материалов и других отраслях промышленности. Основными требованиями, предъявляемыми к аморфному диоксиду, являются аморфная структура, степень очистки и размер частиц. Необходимость создания экономически выгодных технологий с использованием нового сырьевого источника делает получение аморфного диоксида кремния актуальной проблемой. В работе путем максимального извлечения углеродсодержащих компонентов повышали содержание аморфного диоксида кремния в твердом остатке рисовой шелухи. В соответствии с гипотезой о механизме извлечения углеродсодержащих компонентов из рисовой шелухи жидкими экстрагентами подобраны экстрагенты и к числу основных технологических факторов отнесены температура, время процесса и концентрация экстрагента.
Amorphous silicon dioxide is widely used in electronics, medicine, in the production of building manufacture materials and other branches of industry. Different demands are made in every case to amorphous silicon dioxide but the main ones are amorphous structure, purity level and particles size. Modern methods of amorphous silicon dioxide production are based on the silica processing and are power-consuming, expensive and its price and quality are not always satisfied for consumers. The necessity of making economically sound technologies with using a new raw source creation receiving amorphous silicon dioxide and urgent problem. In the work the results of learning processes of coaly components extraction, such as lignin and cellulose in the different technological conditions. Amorphous silicon dioxide content in the hard remainder of a rice peel was raised by maximum coaly components extraction. The hypothesis about mechanism of amorphous silicon dioxide (lignin and cellulose) transition from a rice peel to a liquid state with help of liquid extragents was formulated. In accordance with the hypothesis about mechanism of processing technological characteristics of processes providing maximum level of coaly components extraction were determined, liquid extragents were chosen. For lignin extraction ethyl alcohol with hydrochloric acid addition was used and for cellulose extraction aqueous solution of sulfuric acid was used. It has been stated that temperature, time of extraction process and liquid extragents concentration apply to a number of main technological factors.
Amorphous silicon dioxide is widely used in electronics, medicine, in the production of building manufacture materials and other branches of industry. Different demands are made in every case to amorphous silicon dioxide but the main ones are amorphous structure, purity level and particles size. Modern methods of amorphous silicon dioxide production are based on the silica processing and are power-consuming, expensive and its price and quality are not always satisfied for consumers. The necessity of making economically sound technologies with using a new raw source creation receiving amorphous silicon dioxide and urgent problem. In the work the results of learning processes of coaly components extraction, such as lignin and cellulose in the different technological conditions. Amorphous silicon dioxide content in the hard remainder of a rice peel was raised by maximum coaly components extraction. The hypothesis about mechanism of amorphous silicon dioxide (lignin and cellulose) transition from a rice peel to a liquid state with help of liquid extragents was formulated. In accordance with the hypothesis about mechanism of processing technological characteristics of processes providing maximum level of coaly components extraction were determined, liquid extragents were chosen. For lignin extraction ethyl alcohol with hydrochloric acid addition was used and for cellulose extraction aqueous solution of sulfuric acid was used. It has been stated that temperature, time of extraction process and liquid extragents concentration apply to a number of main technological factors.
Опис
Ключові слова
аморфный диоксид кремния, рисовая шелуха, извлечение, лигнин, целлюлоза, механизм, гипотеза, amorphous silicon dioxide, rice peel, extraction, lignin, cellulose, mechanism, hypothesis
Бібліографічний опис
Получение аморфного диоксида кремния повышенной чистоты из рисовой шелухи / Т. В. Гриднева [и др.] // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Хімія, хімічна технологія та екологія. – Харків : НТУ "ХПІ", 2016. – № 35 (1207). – С. 55-63.