FIELD: chemistry.
SUBSTANCE: process for producing finely dispersed amorphous microsilica by sol-gel method. The process comprises a preliminary drying and milling diatomite. The micronized diatomite added 10-30% sodium hydroxide solution, incubated at 70-90°C for 2-3 hours at a ratio of liquid and solid phases 12: 1. Silicic acid precipitation is carried out from the filtrate by addition of concentrated hydrochloric acid solution. Separate the precipitate of silica and dried.
EFFECT: invention provides a dispersion of fine amorphous microsilica 0,062-0,097 micron with high purity from inexpensive mineral raw materials in a high yield the desired product.
3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING MICROSILICA FROM NATURAL DIATOMITE BY PRECIPITATION OF NITRIC ACID SOLUTION | 2020 |
|
RU2740995C1 |
| METHOD OF PRODUCING ULTRAFINE SILICON DIOXIDE POWDER | 2018 |
|
RU2690830C1 |
| METHOD OF OBTAINING FINELY-DISPERSE AMORPHOUS MICROSILICA | 2013 |
|
RU2526454C1 |
| METHOD OF PRODUCING AMORPHOUS SILICON DIOXIDE | 2011 |
|
RU2474535C1 |
| METHOD FOR PRODUCING LIQUID GLASS | 2011 |
|
RU2480409C1 |
| LIGHTWEIGHT CONCRETE FOR STRUCTURAL, HEAT-INSULATING AND STRUCTURAL PURPOSES | 2022 |
|
RU2783073C1 |
| METHOD OF OBTAINING SILUMIN | 2018 |
|
RU2683176C1 |
| METHOD OF PRODUCING ALUMINIUM-SILICON ALLOY IN ELECTROLYZER FOR ALUMINIUM PRODUCTION | 2015 |
|
RU2599475C1 |
| AMORPHOUS SILICON DIOXIDE SYNTHESIS METHOD | 2009 |
|
RU2402485C1 |
| HIGH POROUS DIATOMITE-BASED MATERIAL AND A METHOD FOR PRODUCTION THEREOF | 2019 |
|
RU2727393C1 |
