FIELD: chemistry.
SUBSTANCE: silica particles of a defined size are added in a regulated way, to a solution of an inorganic acid, heated to 50-110°C with acidity equivalent to the acidity of hydrochloric acid with concentration of 10-37 wt %. The obtained silica is settled and separated from undissolved olivine and other minerals. Further the suspension is filtered and washed from dissolved metal salts. The obtained filtration cake is suspended in a water solution so as to obtain a silica suspension, which has low viscosity and 10-30% content of solid particles. The suspension is separated from the remaining mineral impurities and dried.
EFFECT: obtaining silica in form of powder, teardrop-shaped particles or granules with specific area of 100 m2/g with low content of impurities.
13 cl, 2 dwg, 10 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF INTEGRATED PROCESSING OF MAGNESIUM-CHROME CRUDE ORE | 2006 |
|
RU2344076C2 |
| METHOD FOR PREPARING LAMINATE SILICA | 0 |
|
SU1134542A1 |
| METHOD OF COMPLEX PROCESSING OF SERPENTINE-CHROMITE CRUDE ORE | 2013 |
|
RU2535254C1 |
| METHOD OF PROCESSING SILICATE RAW MATERIAL | 2001 |
|
RU2179527C1 |
| PRECIPITATED SILICA USED AS REINFORCED MATERIAL FOR ELASTOMERS, AND METHOD OF PREPARING THEREOF | 1998 |
|
RU2170212C2 |
| FUNCTIONALIZED SILICON WITH ELASTOMER BINDING | 2015 |
|
RU2669869C2 |
| HIGHLY EFFICIENT CLEANING SILICA MATERIALS OBTAINED THROUGH CONTROL OF PRODUCT MORPHOLOGY AND DENTAL CARE AGENT CONTAINING SAID MATERIALS | 2005 |
|
RU2394763C2 |
| CHARGE FOR PREPARATION OF CATALYST TO OXIDIZE SULFUR DIOXIDE INTO SULFUR TRIOXIDE AND METHOD OF ITS PRODUCTION | 2002 |
|
RU2216400C1 |
| SILICON DIOXIDE BASED SOLS, THEIR PREPARATION AND USAGE | 2005 |
|
RU2363656C2 |
| STABILISED FOR LONG PERIOD SUSPENSION FOR PLATING ON IRON MATERIAL AND TECHNOLOGY OF ITS MANUFACTURING | 2004 |
|
RU2374036C2 |
