| 摘要 |
FIELD: chemistry.SUBSTANCE: invention can be applied in chemical and pulp and paper industry. Silicon-dioxide-based sol has concentration of soluble silicon dioxide is lower than approximately 800 mg of SiO/l, SiOcontent at least 3 wt %, electric conductivity at least approximately 2.0 mS/cm and S-parameter is lower than approximately 50%. Method of obtaining silicon dioxide-based sol includes processing of aqueous solution of alkali metal silicate by electrodialysis with further acidification of electrodialysed sol to pH from approximately 5.0 to approximately 10.EFFECT: silicon dioxide-based sol is applied as flocculant, as well as additive in paper production.14 cl, 8 tbl |
