Process for producing high solids colloidal silica
US10087081B2 · kind B2 · utility
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37References
10Claims
0Family size
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Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Nov 14, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a method for improving the effectiveness of colloidal silica. The method involves removing enough charged impurities from the colloid to prevent the charged particles from causing the colloid to become a viscous gel. The method however also involves not removing too many charged particles so the silica material doesn't gel by cross-linking with itself. This method is quite effective because it recognizes that materials that have accumulated during the formation of the colloid do perform an important function, but they can perform better at a lower concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.