METHOD OF PREPARING HIGH-DISPERSION SILICON DIOXIDE Russian patent published in 1997 - IPC

FIELD: production of inorganic materials. SUBSTANCE: invention concerns preparing high-dispersion silica useful as mineral filler to synthetic rubbers, plastics, etc. Aqueous sodium silicate solution is carbonized, silica is separated from soda solution by filtration, and wet silica precipitate is neutralized with hydrochloric acid and then washed with surfactant-containing water. Utilized surfactant possesses wetting and detergent activity and its concentration is preferably 0.001%. EFFECT: optimized process parameters. 4 cl, 1 tbl