Process for manufacturing high purity silica
US4683128A · kind A · utility
20Cited by
4References
27Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 25, 1986 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Jun 25, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention deals with a process for manufacturing high purity silica which comprises making an aqueous alkali silicate solution into fine fibrous gel in a coagulant, treating the fibrous gel obtained with an acid-containing solution, and then with water to extract and remove impurities; and optionallly heating a resulting silica at a temperature of 1,000.degree. C. or higher. Thus obtained silica is preferably used as a filler, especially, the one for resin compositions for encapsulating electronic parts; etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.