FIELD: chemistry.
SUBSTANCE: method of processing rice husks and producing β-cristobalite involves: sieving, treatment with hot water, treatment with anaerobic bacteria, washing with deionised water, drying at 90-100°C, burning in an oxidative atmosphere at 280-320°C while raising temperature from 100 to 280-320°C at a rate of not more than 2°/min, high-temperature burning at 700-900°C in an oxidative atmosphere.
EFFECT: invention enables to cut total wastes of the processing process, cut the duration of washing with deionised water, cut consumption of deionised water, obtain methane, carbon dioxide gas and powder of nanocrystalline silicon dioxide in a β-cristobalite phase with high purity and whiteness.
2 cl, 3 tbl, 33 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROCESSING RICE HUSKS | 2010 |
|
RU2436730C1 |
| RUBBER FILLER | 2011 |
|
RU2530130C2 |
| METHOD OF PREPARING HIGHLY PURE AMORPHOUS SILICON DIOXIDE AND CARBON FROM RICE HUSK | 1999 |
|
RU2144498C1 |
| METHOD OF PREPARING SUPERDISPERSED AMORPHOUS OR NANOCRYSTALLINE SILICA | 2001 |
|
RU2191159C1 |
| METHOD OF PREPARING RICE HUSK FOR HIGH-PURE SILICON DIOXIDE PRODUCING | 1999 |
|
RU2161124C1 |
| METHOD OF OBTAINING RUBBER FILLER | 2012 |
|
RU2531180C2 |
| METHOD OF PRODUCTION OF HIGH-PURITY WATER GLASS | 1998 |
|
RU2160707C2 |
| METHOD OF PREPARING RICE SHELL FOR PRODUCING HIGH-PURITY SILICON DIOXIDE | 2001 |
|
RU2191158C1 |
| RICE SHELL COMPLEX REPROCESSING MODULE | 1999 |
|
RU2171780C2 |
| METHOD OF PRODUCING AMORPHOUS SILICON DIOXIDE FROM RICE HUSKS | 2011 |
|
RU2480408C1 |
