Production and use of polysilicate particulate materials
US10227238B2 · kind B2 · utility
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28References
23Claims
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Key dates
| Filing date | Apr 4, 2006 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | May 5, 2031 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of preparing a particulate material comprising the steps of adding silicic acid solution, optionally doped with aluminum, optionally added to a slurry of pre-existing nanoparticles at a neutral to slightly acidic pH of no more than seven, and at a temperature of about 20° to 30° C. This yields a polysilicate particulate dispersion. Then, the pH of the dispersion is raised to greater than seven, to stabilize/reinforce particles of the particulate dispersion. Optionally, the particles may be dried, and have increased porosity and surface area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.