Method for preparing acidic solutions of activated silica and polyvalent metal salt for water treatment
US7674374B2 · kind B2 · utility
3Cited by
20References
7Claims
0Family size
Inventor
Key dates
| Filing date | Nov 1, 2005 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Nov 21, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/66
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process is disclosed for the production of acidic solutions of activated silica for water treatment. Activated silica is formed during the process of acidifying a sodium silicate solution to below pH 4 with sulfuric acid. A polyvalent metal salt is then added to stabilize the acidified activated silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.