FIELD: chemistry.
SUBSTANCE: invention can be used in the chemical industry. A solution of silicon-containing material is prepared by adding sodium silicate with silica modulus of 2.8-3.7 to filtered water while stirring thoroughly, heating to 100°C and keeping density of the solution not lower than 1.09 g/cm3. The aqueous solution of the acidifying agent is obtained by adding the acidifying agent to filtered water while thoroughly stirring and keeping density of the solution not lower than 1.02 g/cm3. After reaction of the aqueous solution of the silicon-containing material with the aqueous solution of the acidifying agent, the obtained gel matures in not less than 20 minutes. The ready product is extracted and dried by sharply reducing the pressure in the gel medium.
EFFECT: invention enables to obtain nano-dispersed silicon dioxide, which provides good thixotropic properties with low sedimentation effect.
2 cl
